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Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen, Total:497 items.

In the international standard classification, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen involves: Vocabularies, Air quality, Ferrous metals, Inorganic chemicals, Water quality, Sugar. Sugar products. Starch, Non-ferrous metals, Farming and forestry, Soil quality. Pedology, Tea. Coffee. Cocoa, Test conditions and procedures in general, Analytical chemistry, Metalliferous minerals, Cereals, pulses and derived products, Pesticides and other agrochemicals, Fertilizers, Non-metalliferous minerals, Nuclear energy engineering, Ferroalloys, Materials for the reinforcement of composites, Conducting materials, Environmental protection, Insulating fluids, Fruits. Vegetables, Welding, brazing and soldering, Testing of metals, Measurement of fluid flow, Geology. Meteorology. Hydrology, Raw materials for rubber and plastics, Burners. Boilers, Refractories, Animal feeding stuffs, Iron and steel products, Products of the chemical industry, TEXTILE AND LEATHER TECHNOLOGY, Laboratory medicine, Fuels, Petroleum products in general, General methods of tests and analysis for food products, Milk and milk products, Plastics, Organic chemicals, Pharmaceutics, Glass, Power stations in general, Electrical accessories.

Professional Standard - Environmental Protection, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

HJ 536-2009 Water quality.Determination of ammonia nitrogen.Salicylic acid spectrophotometry
HJ 535-2009 Water quality.Determination of ammonia nitrogen.Nessler's reagent spectrophotometry
HJ/T 64.3-2001 stationary source emission.Determination of cadmium.p-Azobenzenediazoaminazobenzene sulfonic acid spectrophotometric method
HJ 634-2012 Soil.Determination of ammonium, nitrite and nitrate by extraction with potassium chloride solution-spectrophotometric methods
HJ 550-2009 Water quality.Determination of cobalt.5-CI-PADAB spectrophotometry
HJ 665-2013 Water quality.Determination of ammonium nitrogen by continuous flow analysis (CFA) and Salicylic acid spectrophotometry
HJ 666-2013 Water quality.Determination of ammonium nitrogen by flow injection analysis (FIA) and Salicylic acid spectrophotometry
HJ 1191-2021 Spectrophotometric method for the determination of water quality azide
HJ 550-2015 Water quality.Determination of cobalt.5-Cl-PADAB Spectrophotometry
HJ 667-2013 Water quality.Determination of total nitrogen by continuous flow analysis (CFA) and N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometry
HJ 668-2013 Water quality.Determination of total nitrogen by flow injection analysis (FIA) and N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometry
HJ 636-2012 Water quality.Determination of total nitrogen.Alkaline potassium persulfate digestion UV spectrophotometric method
HJ/T 195-2005 Water quality - Determination of ammonia-nitrogen Gas-phase molecular absorption spectrometry
HJ 479-2009 Ambient air.Determination of nitrogen oxides.N-(1-Naphthyl)ethylene diamine dihydrochloride spectrophotometric method
HJ/T 346-2007 Water quality. Determination of nitrate-nitrogen. Ultraviolet spectrophotometry
HJ/T 199-2005 Water quality Determination of tota-nitrogen Gas-phase molecular absorption spectrometry
HJ/T 42-1999 Stationary source emission.Determination of nitrogen oxide.Ultraviolet spectrophotometric method
HJ 479-2009(XG1-2018) Determination of nitrogen oxides (nitrogen monoxide and nitrogen dioxide) in ambient air Spectrophotometric method of naphthalene ethylenediamine hydrochloride "No. 1 Amendment"
HJ 811-2016 Water quality―Determination of total selenium―3,3′-Diaminobenzidine spectrophotometric method
HJ/T 43-1999 Stationary source emission-Determination of nitrogen oxide-N-(1-naphthyl)-ethylenediamine dihydrochloride spectrophotometric method
HJ/T 196-2005 Water quality - Determination of Kjeldahl-nitrogen Gas-phase molecular absorption spectrcmetry
HJ/T 198-2005 Water quality - Determination of nitrate-nitrogen Gas-phase molecular absorption spectrometry
HJ/T 197-2005 Water quality - Determination of nitrite-nitrogen Gas-phase molecular absorption spectrometry
HJ 597-2011 Water quality- Determination of total mercury -Cold atomic absorption spectrophotometry
HJ 632-2011 Soil. Determination of Total Phosphorus by alkali fusion. Mo-Sb Anti spectrophotometric method
HJ 503-2009 Water quality.Determination of volatile phenolic compounds.4-AAP spectrophotometric method
HJ 533-2009 Ambient air exhaust gas.Determination of ammonia.Nessler's reagent spetcrophotometry
HJ 534-2009 Ambient air.Determination of ammonia.Sodium hypochlorite.salicylic acid spectrophotometry

Association Francaise de Normalisation, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

NF A06-555:2010 Steel - Determination of nitrogen content - Spectrophotometric method.
NF T20-286:1982 Nitric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method.
NF A06-555*NF EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
NF T90-080:1997 Water quality - Determination of ammonium nitrogen by flow analysis (CFA and FIA) and spectrometric detection.
NF T20-297:1971 Chemical analysis of sulphuric acid and oleum. Determination of ammoniacal nitrogen. Spectrophotometric method.
NF T90-080*NF EN ISO 11732:2005 Water quality - Determination of ammonium nitrogen - Method by flow analysis (CFA and FIA) and spectrometric detection.
NF EN ISO 11732:2005 Qualité de l'eau - Dosage de l'azote ammoniacal - Méthode par analyse en flux (CFA et FIA) et détection spectrométrique
NF EN ISO 5378:1994 Amidons, fécules et produits dérivés - Dosage de l'azote selon la méthode de Kjeldahl - Méthode spectrophotométrique.
NF V03-608*NF EN ISO 5378:1994 Starches and derived products. Determination of nitrogen content by the kjeldahl method. Spectrophotometric method.
NF A06-323:1987 Chemical analysis of steels. Determination of nitrogen content. Molecular absorption spectrophotometric method.
NF X43-339*NF ISO 11564:2000 Stationary source emissions - Determination of the mass concentration of nitrogen oxides - Naphthylethylenediamine photometric method.
NF T90-026:1993 Water quality - Determination of total arsenic - Silver diethyldithiocarbamate spectrophotometric method.
NF A06-373*NF EN 10179:1989 Chemical analysis of ferrous materials. Determination of nitrogen (trace amounts) in steels. Spectrophotometric method.
NF EN ISO 13395:1996 Qualité de l'eau - Détermination de l'azote nitreux et de l'azote nitrique et de la somme des deux par analyse en flux (CFA et FIA) et détection spectrométrique
NF T90-012*NF EN ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection.
NF X43-373:2006 Stationary source emissions - Determination of mass concentration of nitrogen oxides (NOx) - Reference method : chemiluminescence.
NF M07-058:1992 Produits pétroliers - Dosage de l'azote total dans les distillats pétroliers - Méthode par combustion et détection par chimioluminescence.
NF T20-805:1980 Light olefins for industrial use. Determination of ammonia. Spectrophotometric method.
NF T20-482:1979 Phosphoric acid for industrial use (including foodstuffs. Determination of oxides of nitrogen content ). 3,4-xylenol spectrophotometric method.
NF EN 17041:2018 Engrais - Dosage du bore dans des concentrations inférieures ou égales à 10 % par spectrométrie avec l'azométhine H
NF ISO 11564:2000 Émissions de sources fixes - Détermination de la concentration en masse des oxydes d'azote - Méthode photométrique à la naphtyléthylène diamine (NEDA)
NF V18-106*NF ISO 6491:2011 Animal feeding stuffs - Determination of phosphorus content - Spectrophotometric method
NF V18-106:1980 Animal feeding stuffs. Determination of total phosphorus content. Spectrophotometric method.
NF X43-373*NF EN 14792:2017 Stationary source emissions - Determination of mass concentration of nitrogen oxides - Standard reference method : chemiluminescence
NF EN 14792:2017 Émissions de sources fixes - Détermination de la concentration massique des oxydes d'azote - Méthode de référence normalisée : chimiluminescence

YU-JUS, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

JUS H.B8.637-1981 Sulphuric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method
JUS H.G8.130-1984 Reagents. Ammonia solution. Determination of iron content. 1,10—Phenanthrolinespectrophotometric method
JUS H.B8.287-1983 Fertilizers. Determination of content amid-nitrogen. Spectrophotometric method
JUS H.G8.418-1991 Reagents. Sodium hvdroxide. Determination of arsenic content. Silver diethvldithiocarbamate spectrophotometric method
JUS H.B8.636-1981 Sulphuric acid for industrial u se. Determination of oxides of nitrogen. 2,4-xyleno/ spectrophotometric method
JUS H.B8.815-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of copper content - Atomic absorption spectrophotometric method
JUS H.Z1.137-1985 Testing of industrial vvaters. Determination of nitrite-nitrate and the combined nitrite-nitrate nitrogen, Spectrophotometric method
JUS E.Z8.014-1993 Soups,broaths,sauces and seasonings - Spectrophotometric determination of total creatinine content
JUS H.G8.128-1984 Reagents. Ammonia solution. Determination of phosphate content. Spectrophotometric method
JUS H.B8.043-1991 Liquid hydrocarbons. Determination of total chloride content. Spectrophotonetric method
JUS H.Z1.175-1985 Testing of industrial waters. Determination of total arsenic. Spectrophotometric method with silver die- thyldithiocarbamate

TR-TSE, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

TS 2466-1976 Nitric Acit For Industrial Use Determination of Ammoniacal Nitrogen Content Spectrophotoraetric Method
TS 3651-1981 METHODS FOR THE ANALYSIS OF WATER — DETERMINATION OF IRON CONTENT — 1,10 Phenanthroline Spectrophotometry Method
TS 2918-1978 PHOSPHORIC ACID FOR INDUSTRIAL USE (INCLUDING FOODSTUFFS) — DETERMINATION OF OXIDES OF NITROGEN CONTENT — 3,4 — XYLENOL SPECTROPHOTOMETRY

Hunan Provincial Standard of the People's Republic of China, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DB43/T 1403-2018 Water Quality Determination of Ammonia Nitrogen-Gas-liquid Separation and Collection Spectrophotometry

German Institute for Standardization, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DIN EN ISO 4945:2019-03 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018); German version EN ISO 4945:2018
DIN EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977); German version EN ISO 4945:2009
DIN EN 10179:2023-07 Steels - Determination of nitrogen (trace amounts) - Spectrophotometric method; German and English version prEN 10179:2023 / Note: Date of issue 2023-05-26*Intended as replacement for DIN EN 10179 (1990-04).
DIN EN ISO 4945:2019 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)
DIN EN ISO 5378:1994-10 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978); German version EN ISO 5378:1994
DIN EN 10179:1990 Chemical analysis of ferrous materials; determination of nitrogen (trace amounts) in steels; spectrophotometric method; German version EN 10179:1989
DIN EN 10179:1990-04 Chemical analysis of ferrous materials; determination of nitrogen (trace amounts) in steels; spectrophotometric method; German version EN 10179:1989
DIN EN ISO 13395:1996-12 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection (ISO 13395:1996); German version EN ISO 13395:1996
DIN EN 17041:2018 Fertilizers - Determination of boron in concentrations 10 % using spectrometry with azomethine-H
DIN EN ISO 11732:2005 Water quality - Determination of ammonium nitrogen - Method by flow analysis (CFA and FIA) and spectrometric detection (ISO 11732:2005); German version EN ISO 11732:2005
DIN EN ISO 5378:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978); German version EN ISO 5378:1994
DIN EN 14792:2017-05 Stationary source emissions - Determination of mass concentration of nitrogen oxides - Standard reference method: chemiluminescence; German version EN 14792:2017
DIN EN ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection (ISO 13395:1996); German version EN ISO 13395:1996

ES-UNE, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

UNE-EN ISO 4945:2019 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)
UNE-EN 17041:2019 Fertilizers - Determination of boron in concentrations = 10 % using spectrometry with azomethine-H

KR-KS, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

KS D ISO 4945-2022 Steel — Determination of nitrogen — Spectrophotometric method
KS I ISO 6332-2021 Water quality ― Determination of iron —Spectrometric method using 1,10-phenanthroline
KS I ISO 7996-2021 Ambient air — Determination of the mass concentration of nitrogen oxides — Chemiluminescence method

International Organization for Standardization (ISO), Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

ISO 2991:1974 Nitric acid for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
ISO 4945:1977 Steel; Determination of nitrogen content; Spectrophotometric method
ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
ISO 2899:1974 Sulphuric acid and oleums for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
ISO 11732:2005 Water quality - Determination of ammonium nitrogen - Method by flow analysis (CFA and FIA) and spectrometric detection
ISO 6332:1982 Water analysis — Determination of iron — 1,10-phenanthroline photometric method
ISO 5378:1978 Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Spectrophotometric method
ISO/TR 11905-2:1997 Water quality - Determination of nitrogen - Part 2: Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
ISO 11564:1998/cor 1:2000 Stationary source emissions - Determination of the mass concentration of nitrogen oxides - Naphthylethylenediamine photometric method; Technical Corrigendum 1
ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
ISO 2363:1972 Sulphuric acid and oleums for industrial use; Determination of oxides of nitrogen; 2,4- Xylenol spectrophotometric method
ISO 7996:1985 Ambient air; Determination of the mass concentration of nitrogen oxides; Chemiluminescence method
ISO 3709:1976 Phosphoric acid for industrial use (including foodstuffs); Determination of oxides of nitrogen content; 3,4- Xylenol spectrophotometric method
ISO 6595:1982 Water quality; Determination of total arsenic; Silver diethyldithiocarbamate spectrophotometric method
ISO 1657:1975 Raw rubber and rubber latex — Determination of iron content — 1,10- Phenanthroline photometric method
ISO 25761:2008 Plastics - Polyols for use in the production of polyurethanes - Determination of basicity (total amine value), expressed as percent nitrogen
ISO 5375:1979 Condensed phosphates for industrial use (including foodstuffs); Determination of oxides of nitrogen content; 3,4- Xylenol spectrophotometric method
ISO 6491:1980 Animal feeding stuffs; Determination of total phosphorus content; Spectrophotometric method
ISO 25761:2014 Plastics - Polyols for use in the production of polyurethanes - Determination of basicity (total amine value), expressed as percent nitrogen
ISO 29441:2010 Water quality - Determination of total nitrogen after UV digestion - Method using flow analysis (CFA and FIA) and spectrometric detection

BE-NBN, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

NBN T 03-041-1979 Nitric acid for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
NBN T 91-254-1976 Water analysis methods - Determination of the ammoniacal nitrogen -Direct photometric methodwith sodium phenate
NBN T 03-024-1979 Sulphuric acid and oleum for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
NBN T 91-251-1976 Water analysis methods — Determination of the ammoniacal nitrogen — Direct photometric method with Nessler reagent
NBN T 91-257-1977 Water analysis methods - Determination of the nitrite nitrogen - Photoraetric method
NBN-EN ISO 5378:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
NBN T 91-256-1977 Water analysis methods - Determination of the nitrate nitrogen -Photometric method with chromotropic acid
NBN T 04-304-1983 Urea for indus trial use - Determination of iron content-2,2'-Bipyridyl photometric method
NBN T 03-270-1980 Phosphoric acid for industrial use (including foodstuffs)-Determi-nation of oxides of nitrogen content - 3,4-Xylenol spectrophotometric method
NBN T 95-301-1977 Determination of the nitrogen oxides content of flue gasses -Photometrie method with chromotropic acid
NBN-EN 10179-1992 Chemical analysis of ferrous materials. Determination of nitrogen (trace amounts) in steels. Spectrophotometric method
NBN T 03-021-1979 Sulphuric acid and oleum for industrial use - Determination of oxides of nitrogen - 2,4-Xylenol spectrophotometric method
NBN T 03-313-1980 Condensed phosphates for industrial use (including foodstuffs) Determination of oxides of nitrogen content - 3,4-Xylenol spectrophotometric method

Group Standards of the People's Republic of China, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

T/CHES 27-2019 Water Quality Determination of Ammonia Nitrogen Automatic Analysis Nessler's Reagent Spectrophotometry
T/NAIA 004-2020 Determination of Ammonia Nitrogen Concentration in Rumen Fluid Alkaline Sodium Hypochlorite-Phenol Spectrophotometry
T/CHES 12-2017 Water Quality Determination of Ammonia Nitrogen Gas Phase Molecular Absorption Spectrometry
T/CHES 15-2017 Determination of Total Nitrogen in Water Quality Gas Phase Molecular Absorption Spectrometry
T/QAS 046-2021 Determination of total iron, ferrous iron and ferric iron in brine by phenanthroline spectrophotometric method
T/QAS 082.4-2023 Rock Salt and Glauber's Salt Chemical Analysis Part 4: Determination of Iron Phthalene Spectrophotometric Method
T/CHES 13-2017 Water Quality Determination of Nitrate Nitrogen Gas Phase Molecular Absorption Spectrometry
T/CAIA SH002-2014 Water for drinking determination of fluoride 2-(parasulfophenylazo)-1,8-dihydroxy-3,6-naphthalene disulfonic acid, zirconium salt spectrophotometric method
T/CHES 14-2017 Water Quality Determination of Nitrite Nitrogen Gas Phase Molecular Absorption Spectrometry
T/NAIA 097-2021 Determination of total phenolic content in Lycium barbarum by spectrophotometric method
T/GDFDTAEC 03-2022 Determination of total ginsenosides in health food by Spectrophotometry
T/GXAF 0010-2023 Spectrophotometric method for the determination of free amino acid content in water-soluble fertilizers
T/ZCSIA 8-2023 Determination of total polyphenol content in sweet potato leaves by spectrophotometric method

CEN - European Committee for Standardization, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
EN ISO 11732:1997 Water Quality - Determination of Ammonium Nitrogen by Flow Analysis (CFA and FIA) and Spectrometric Detection

British Standards Institution (BSI), Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

BS EN ISO 4945:2010 Steel. Determination of nitrogen content. Spectrophotometric method
BS EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
BS EN ISO 4945:2018 Tracked Changes. Steel. Determination of nitrogen. Spectrophotometric method
23/30472739 DC BS EN 10179. Steels. Determination of nitrogen (trace amounts). Spectrophotometric method
BS EN ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
BS EN 17041:2018 Fertilizers. Determination of boron in concentrations ≤ 10 % using spectrometry with azomethine-H
BS ISO 11564:1998 Stationary source emissions - Determination of the mass concentration of nitrogen oxides - Naphthylethylenediamine photometric method
BS 6200-3.22.3:1986 Sampling and analysis of iron, steel and other ferrous metals. Methods of analysis. Determination of nitrogen. Steel: spectrophotometric method (for trace amounts)
BS EN 26595:1983 Water quality - Determination of total arsenic - Silver diethyldithiocarbamate spectrophotometric method
BS ISO 25761:2008 Plastics - Polyols for use in the production of polyurethanes - Determination of basicity (total amine value), expressed as percent nitrogen
BS ISO 25761:2014 Plastics. Polyols for use in the production of polyurethanes. Determination of basicity (total amine value), expressed as percent nitrogen
BS EN 14792:2005 Stationary source emissions - Determination of mass concentration of nitrogen oxides (NOx) - Reference method: Chemiluminescence
BS 6200 SubSec.3.22.2:1985 Sampling and analysis of iron, steel and other ferrous metals. Methods of analysis. Determination of nitrogen. Steel: spectrophotometric method
BS EN ISO 11732:2005 Water quality. Determination of ammonium nitrogen. Method by flow analysis (CFA and FIA) and spectrometric detection
BS 6200 SubSec.3.22.3:1986 Sampling and analysis of iron, steel and other ferrous metals. Methods of analysis. Determination of nitrogen. Steel: spectrophotometric method (for trace amounts)

European Committee for Standardization (CEN), Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
EN 10179:1989 Chemical Analysis of Ferrous Materials - Determination of Nitrogen (Trace Mounts) in Steel Spectrophotometric Method
EN ISO 13395:1996 Water Quality - Determination of Nitrite Nitrogen and Nitrate Nitrogen and the Sum of Both by Flow Analysis (CFA and FIA) and Spectrometric Detection
EN 17041:2018 Fertilizers - Determination of boron in concentrations ��10 % using spectrometry with azomethine-H
EN 26595:1992 Water Quality - Determination of Total Arsenic - Silver Diethyldithiocarbamate Spectrophotometric Method (ISO 6595:1982)
EN 14792:2005 Stationary source emissions - Determination of mass concentration of nitrogen oxides (NOx) - Reference method: Chemiluminescence
EN 14792:2017 Stationary source emissions - Determination of mass concentration of nitrogen oxides - Standard reference method: chemiluminescence
EN ISO 11732:2005 Water quality - Determination of ammonium nitrogen - Method by flow analysis (CFA and FIA) and spectrometric detection (ISO 11732:2005)

Korean Agency for Technology and Standards (KATS), Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

KS D ISO 4945:2002 Steel－Determination of nitrogen content－Spectrophotometric method
KS H ISO 5378-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS D ISO 4945-2002(2017) Steel－Determination of nitrogen content－Spectrophotometric method
KS I ISO 6332:2021 Water quality ― Determination of iron —Spectrometric method using 1,10-phenanthroline
KS I ISO 11732:2008 Water quality－Determination of ammonium nitrogen－Method by flow analysis(CFA and FIA) and spectrometric detection
KS I ISO 11732-2008(2018) Water quality－Determination of ammonium nitrogen－Method by flow analysis(CFA and FIA) and spectrometric detection
KS H ISO 5378:2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS D ISO 1812-2002(2017) Copper alloys－Determination of iron content－1,10-Phenanthroline spectrophotometric method
KS D ISO 1812-2002(2022) Copper alloys－Determination of iron content－1,10-Phenanthroline spectrophotometric method
KS I ISO 13395-2008(2018) Water quality－Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
KS I ISO 11564:2004 Stationary source emissions-Determination of the mass concentrationof nitrogen oxides(Naphthylethylenediamine photometric method)
KS I ISO 11564:2014 Stationary source emissions — Determination of the mass concentration of nitrogen oxides(naphthylethylenediamine photometric method)
KS I ISO 11905-2-2008(2013) Water quality－Determination of nitrogen－Part 2：Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
KS I ISO 11905-2:2008 Water quality-Determination of nitrogen-Part 2:Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
KS M 9143-2002 WATER QUALITY-DETERMINATION OF TOTAL ARSENIC-SILVER DIETHYLDITHIOCARBAMATE SPECTROPHOTOMETRIC METHOD
KS I ISO 13395:2008 Water quality-Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
KS D ISO 793-2002(2022) Aluminium and aluminium alloys－Determination of iron－Orthophenanthroline photometric method
KS M 9143-2005 WATER QUALITY-DETERMINATION OF TOTAL ARSENIC-SILVER DIETHYLDITHIOCARBAMATE SPECTROPHOTOMETRIC METHOD
KS D ISO 793-2002(2017) Aluminium and aluminium alloys－Determination of iron－Orthophenanthroline photometric method
KS I ISO 11564-2014(2019) Stationary source emissions — Determination of the mass concentration of nitrogen oxides(naphthylethylenediamine photometric method)
KS I ISO 7996:2006 Ambient air－Determination of the mass concentration of nitrogen oxides(Chemiluminescence method)
KS I ISO 7996-2006(2016) Ambient air－Determination of the mass concentration of nitrogen oxides(Chemiluminescence method)
KS I ISO 7996:2021 Ambient air — Determination of the mass concentration of nitrogen oxides — Chemiluminescence method
KS M ISO 1657-2012(2022) Rubber, raw and rubber latex－Determination of iron content－1,10-Phenanthroline photometric method
KS M ISO 1657-2012(2017) Rubber, raw and rubber latex－Determination of iron content－1,10-Phenanthroline photometric method
KS E ISO 6607-2011(2016) Aluminium ores－Determination of total silicon content－Combined gravimetric and spectrophotometric method

Danish Standards Foundation, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DS/EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
DS/EN ISO 5378:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophometric method
DS/EN ISO 13395:1997 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
DS/EN 10179:1989 Chemical analysis of ferrous materials. Determination of nitrogen (trace amount) in steels. Spectrophotometric method
DS/ISO 11564+Cor.1:2000 Stationary source emissions - Determination of the mass concentration of nitrogen oxides - Naphthylethylenediamine photometric method
DS/ISO 29441:2010 Water quality - Determination of total nitrogen after UV digestion - Method using flow analysis (CFA and FIA) and spectrometric detection
DS/EN ISO 11732:2005 Water quality - Determination of ammonium nitrogen - Method by flow analysis (CFA and FIA) and spectrometric detection
DS/EN 14792:2006 Stationary source emissions - Determination of mass concentration of nitrogen oxides (NOx) - Reference method: Chemiluminescence

CZ-CSN, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

CSN 65 1025 Cast.10-1989 Sulphuric acid for industrial use. pectrophotometric method for the etermination of total nitrogen xides
CSN 42 0691 Cast.2-1985 Chemical analysis of non-ferrous metals and alloys. Titanium. Determination of nitrogen by the photometric method and titrimetric method
CSN ISO 6332:1995 Water quality - Determination of iron - Spectrometric method using 1,10-phenantroline
CSN EN 10 179-1993 Chemical analysis of ferrous metals — Determination of nitrogen (trace amounts) in steels — Spectrophotometric method
CSN ISO 9061:1992 Acid-grade and ceramic-grade fluorspar - Determination of iron content - 1,10-Phenantroline spectrometric method
CSN 72 0120 Z1-1997
CSN 72 0112 Cast.3 Z1-1997
CSN 83 4721 Cast.4-1987 Air Pollution Control. Determination of nitrogen oxides emissions from stationary sources. Photometric measurement method
CSN 70 0626 Cast.2-1976 Glass testing. Chemical analysis of glass. Determination of iron(III)-oxide. Photometric method with the use of 1,10-phenanthroline

NL-NEN, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

NEN 6646-1990 Water - Photometric determination of the content of ammonium nitrogen and of the sum of the contents of ammoniacal and organically bound nitrogen according to Kjeldahl by continuous flow analysis
NEN 2040-1979 Ambient air - Photometric determination of nitrogen dioxide content (Saltzman method)
NEN 2848-1986 Fruit juices - Determination of the total pectin content - Spectrophotometric method

Professional Standard - Water Conservancy, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

SL 84-1994 Determination of nitrogen (nitrate)(Ultraviolet spectrophtometric method)

ES-AENOR, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

Professional Standard - Geology, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DZ/T 0064.57-2021 Analytical Methods of Groundwater Quality Part 57: Determination of Ammonia Nitrogen by Nessler's Reagent Spectrophotometry
DZ/T 0064.23-1993 Groundwater quality testing method Determination of iron by phenanthrene spectrophotometry
DZ/T 0064.23-2021 Analytical methods for groundwater quality - Part 23: Determination of iron content by phenanthroline spectrophotometric method

中华人民共和国环境保护部, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

GB 7493-1987 Water quality-Determination of nitrogen (nitrite)-Spectrophotometric method
GB 7480-1987 Water quality-Determination of nitrate-Spectrophotometric method with phenol disulfonic acid
GB 11220.1-1989 Determination of uranium in soil-CL-5209 extractant-containing resin separation 2-(5-bromo-2-pyridylazo)-5-diethlaminophenol spectrophotometry
GB 11894-1989 Water quality-Determination of total nitrogen-Alkaline potassium persulfate digestion-UV spectrophotometric method
GB 11889-1989 Water quality-Determination of auiline compounds-Spectrophotometric method with N-(1-naphthyl)echylenediamine
GB 7485-1987 Water quality-Determination of total arsenic-Silver diethyldithiocarbamate spectrophotometric method
GB 11893-1989 Water quality-Determination of total phosphorus-Ammonium molybdate spectrophotometric method

Lithuanian Standards Office , Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

LST EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
LST EN ISO 5378:2000 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
LST EN 10179-2000 Chemical analysis of ferrous materials - Determination of nitrogen (trace mounts) in steel - Spectrophotometric method
LST EN ISO 13395:2000 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection (ISO 13395:1996)
LST ISO 7996:1999 Ambient air. Determination of the mass concentration of nitrogen oxides. Chemiluminescence method (ISO 7996:1985)
LST EN 14792-2006 Stationary source emissions - Determination of mass concentration of nitrogen oxides (NOx) - Reference method: Chemiluminescence

AENOR, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

UNE-EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
UNE-EN ISO 5378:1995 STARCHES AND DERIVED PRODUCTS. DETERMINATION OF NITROGEN CONTENT BY THE KJELDHAL METHOD. SPECTROPHOTOMETRIC METHOD. (ISO 5378:1978).
UNE 36317-2:1989 Chemical analysis of ferrous materials - Determination of nitrogen (trace mounts) in steel - Spectrophotometric method
UNE 77228:2002 Stationary source emissions. Determination of the mass concentration of nitrogen oxides. Naphthylethylenediamine photometric method.
UNE 77212:1993 AMBIENT AIR. DETERMINATION OF THE MASS CONCENTRATION OF NITROGEN OXIDES. CHEMILUMINESCENCE METHOD.
UNE-EN ISO 13395:1997 WATER QUALITY. DETERMINATION OF NITRITE NITROGEN AND NITRATE NITROGEN AND THE SUM OF BOTH BY FLOW ANALYSIS (CFA AND FIA) AND SPECTROMETRIC DETECTION. (ISO 13395:1996).
UNE-EN 14792:2017 Stationary source emissions - Determination of mass concentration of nitrogen oxides - Standard reference method: chemiluminescence

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

GB/T 7493-1987 Water quality--Determination of nitrogen (nitrite)--Spectrophotometric method
GB/T 32737-2016 Determination of nitrate nitrogen in soil - Ultraviolet spectrophotometry method
GB/T 11894-1989 Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photometric method
GB/T 6730.24-2006 Iron ores Determination of total rare earth contentd Chlorophosphonazo mA spectrophotometric method
GB/T 7630-1987 The tribromoarsenazo photometric method for the determination of rare earth oxide content in rice and wheat
GB 7630-1987 The tribromoarsenazo photometric method for the determination of rare earth oxide content in rice and wheat
GB/T 6730.24-1986 Methods for chemical analysis of iron ores--The arsenazo 3 photometric method for the determination of rare earth elements content
GB/T 7480-1987 Water quality--Determination of nitrate--Spectrophotometric method with phenol disulfonic acid
GB/T 5195.10-2006 Fluorspar. Determination of iron content. 1,10-phenanthroline spectrophotometric method
GB/T 8220.2-1998 Methods for chemical analysis bismuth--Determination of iron content--1,10-Phenanthroline photometric method
GB/T 20931.9-2007 Methods for chemical analysis of lithium Determination of nitrogen content Mercuric potassium iodide spectrophotometric method
GB/T 11843-1989 Uranium dioxide powder and pellets--Determination of nitrogen--Spectrophotometric method
GB/T 24583.5-2009 Vanadium-Nitrogen alloy.Determination of phosphorus content.The bismuth molybdenum blue spectrophotometry method
GB 11843-1989 Determination of Nitrogen in Uranium Dioxide Powder and Pellets Spectrophotometric Method
GB/T 11067.4-1989 Silver--Determination of antimony content--2-(5-bromo -2-pyridylazo)-5-diethylaminophenol spectrophotometricmethod
GB 11067.4-1989 Silver—Determination of antimony content—2-(5-bromo-2-pyridylazo)-5-diethylaminophenol spectrometric method
GB/T 20931.4-2007 Methods for chemical analysis of lithium Determination of iron content Orthopenanthroline spectrophotometric method
GB/T 11198.11-1989 Sulphuric acid for industrial use--Determination of oxides of nitrogen-2.4-xylenol spectrophotometric method
GB/T 223.49-1994 Methods for chemical analysis of iron,steel and alloy. Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content
GB/T 14849.1-1993 Silicon metal.Determination of iron content.1,10-Phenanthroline spectrophotometric method
GB/T 6987.24-2001 Aluminium and aluminium alloys--Determination of the cerium subgroup of rare earth elements content--Tribromoarsenazo spectrophotometric method
GB/T 223.70-2008 Iron,steel and alloy.Determination of iron contents. o-Phenanthroline spectrophotometric method
GB/T 4324.26-1984 Methods for chemical analysis of tungsten--The Nessler reagent photometric method for the determination of nitrogen content
GB/T 4325.26-1984 Methods for chemical analysis of molybdenum--The nessler reagent photometric method for the determination of nitrogen content
GB/T 10574.5-1989 Tin-lead solders--Determination of iron content--1,10-phenanthroline spectrophotometric method
GB/T 4702.7-2016 Chromium metal.Determination of nitrogen content.Distillation-nessler reagent spectrophotometric method
GB/T 4324.6-1984 Methods for chemical analysis of tungsten--The ortho-phenanthroline photometric method for the determination of iron content
GB/T 4325.15-1984 Methods for chemical analysis of molybdenum--The chlorophosphonazo 1 photometric method for the determination of magnesium content
GB/T 4325.6-1984 Methods for chemical analysis of molybdenum--The ortho-phenanthroline photometric method for the determination of iron content
GB/T 4324.15-1984 Methods for chemical analysis of tungsten--The chlorophosphonazo I photometric method for the determination of magnesium content
GB/T 6987.4-2001 Aluminium and aluminium alloys--Determination of iron content--Orthopenanthroline photometric method
GB/T 7315.3-1987 Methods for chamical analysis of vanadium pentixide--The ortho-phenanthroline spectrophotometric method forthe determination of iron content
GB/T 13747.2-1992 Zirconium and zirconium alloys--Determination of iron content--1,10-phenanthroline spectrophotometric method
GB/T 13748.4-1992 Magnesium and its alloys--Determination of cerium content--Tribromoarsenazo spectrophotometric method
GB/T 13748.5-1992 Magnesium and its alloys--Determination of iron content--Orthophenanthroline spectrophotometric method
GB/T 3257.15-1999 Methods for chemical analysis of bauxite--Determination the total content of rare earth oxide--Tribromo-arsenazo photometric method
GB/T 4324.6-2012 Methods for chemical analysis of tungsten.Part 6:Determination of iron content.1,10-phenanthroline spectrophotometry
GB/T 3260.2-2013 Methods for chemical analysis of tin.Part 2:Determination of iron content.1,10-phenanthroline photometric method
GB/T 6730.37-1986 Methods for chemical analysis of iron ores--The 4-[(5-chloro-2-pyridyl)azo]-1,3-diaminobenzene photometric method for the determination of cobalt content
GB 6730.37-1986 Methods for chemical analysis of iron ores--The 4-[(5-chloro-2-phridyl)azo]-1,3-diamino-benzene photometric method for the determination of cobalt content
GB/T 16032-1995 Workplace air--Determination of nitrogen oxides--Naphthyl ethylenediamine dihydrochloride spectrophotometric method
GB/T 4699.3-2007 Ferrochromium, silicochromium and nitrogen-bearing ferrochromium.Determination of phosphorus content.Molybdobismuthylphosphoric blue speckophotometric method and the molybdenum blue spectrophotometric method
GB 10267.5-1988 Analytical method for calcium metal Distillation-Nessler reagent photometric determination of nitrogen
GB/T 10267.5-1988 Method for analysis of calcium metal--The determination of nitrogen by distillation--Nessler reagent photometric method
GB 223.49-1985 Methods for chemical analysis of iron,steel and alloy--The extraction separation-chlorophosphonazo mA photometric method for the determination of rare earth elements
GB/T 11220.1-1989 Determination of uranium in soil--CL-5209 extractant-containing resin separation 2-(5-bromo-2-pyridylazo) -5-diethlaminophenol spectrophotometry
GB/T 15076.4-2020 Methods for chemical analysis of tantalum and niobium—Part 4:Determination of iron content—1,10-Phenanthroline spectrophotometry
GB/T 14506.26-1993 Silicate rocks. Determination of cobalt content. 4-[(5-Chtoro-2-pyridyl)-azo]-1,3-diamino benzene photometric method
GB/T 13748.9-2005 Chemical analysis methods of magnesium and magnesium alloys.Determination of iron content.Orthopenanthroline spectrophotometric method
GB/T 14422-1993 Analysis of water used in boiler and cooling system. Determination of benzotriazole. Ultraviolet spectrophotometry
GB/T 8158.4-1987 Methods for chemical analysis of sodium fluoride--The 1,10-phenanthroline spectro photometric method for the determination of iron content
GB/T 8654.1-1988 Methods for chemical analysis of manganese metal--The ortho-phenanthroline photometric method for the determination of iron content
GB/T 23278.2-2009 Methods for chemical analysis of sodium stannate.Part 2:Determination of iron content.1,10-phenanthroline photometric method
GB/T 11889-1989 Water quality--Determination of aniline compounds--Spectrophotometric method with N-(1-naphthyl) ethylenediamine
GB/T 5686.4-2022 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal—Determination of phosphorus content—Molybdenum blue spectrophotometric method and bismuth phosphomolybdate b
GB/T 3253.2-2008 Methods for chemical analysis of antimony and antimony trioxide.Determination of iron content.Orthophenanthroline spectrophotometric method
GB/T 4698.2-1996 Sponge titanium, titanium and titanium alloys--Determination of iron content--1,10-Phenanthroline spectrophotometric method
GB/T 10574.7-1989 Tin-lead solders--Determination of copper content--2,9-dimethyl-1,10-phenanthroline spetrophotometric method
GB/T 12689.11-2004 The methods for chemical analysis of zinc and zinc alloys-The determination of lanthanum and cerium contents-The tri-bromide arsenazo spectrophotometric method
GB/T 23274.2-2009 Methods for chemical analysis of stannic oxide.Part 2:Determination of iron content.1，10-phenanthroline photometric method
GB/T 14849.1-2007 Methods for chemical analysis of silicon metal-Part 1:Determination of iron content-1,10-Phenanthrolion spectrophotometric method
GB/T 13747.23-1992 Zirconium and zirconium alloys--Determination of nitrogen content--Distillation--Nessler reagent spectrophotometric method
GB/T 15400-1994 Determination of tryptophan in feedstuffs--Spectrophotometry
GB/T 13747.6-1992 Zirconium and zirconium alloys--Determination of copper content-2,9-dimethyl-1,10-phenanthroline spectrophotometric method
GB/T 12690.19-1990 Rare-earth metals and their oxides--Determination of iron content--1,10-phenanthroline spectrophotometric method
GB/T 4375.5-1984 Methods for chemical analysis of gallium--The N2O-C2H2flame atomic absorption spectrophotometric method for the determination of calcium content
GB/T 13748.8-1992 Magnesium and its alloys--Determination of copper content-2,9-dimethyl-1,10-phenanthroline spectrophotometric method
GB/T 8654.1-2007 Manganese metal,ferromanganese-silicon,ferromanganese and nitrogen-bearing ferromanganese Determination of iron content The ortho-phenanthrdine spectrophotometric method and the titanium trichloride-potassium dichromate titrimetric method
GB/T 13748.9-2013 Chemical analysis methods of magnesium and magnesium alloys.Part 9:Determination of iron content.Orthopenanthroline spectrophotometric method
GB/T 7485-1987 Water quality--Determination of total arsenic--Silver diethyldithiocarbamate spectrophotometric method
GB/T 6609.4-1986 Methods for chemical analysis of aluminium oxide--The orthophenanthroline photometric method for the determination of ferric oxide content
GB/T 4375.4-1984 Methods for chemical analysis of gallium--The 4,7-diphenyl-1,10-phenanthroline photometric method for the determination of iron content
GB/T 20975.4-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 4: Determination of iron content.Orthopenanthroline photometric method
GB 223.37-1989 Methods for chemical analysis of iron,steel and alloy The indophenol blue photometric methods for the determination of nitrogen content after distillation seperation
GB/T 223.37-1989 Methods for chemical analysis of iron,steel and alloy--The indophenol blue photometric methods for the determination of nitrogen content after distillation separation
GB/T 4375.2-1984 Methods for chemical analysis of gallium--The 4-(2-pyridylazo)-resorcinol photometric method for the determination of lead content
GB/T 8156.7-1987 Methods for chemical analysis of aluminium fluoride for industrial use--The 1,10-phenanthroline photometric method for the determination of iron content
GB/T 6437-2002 Determination of phosphorus in feed--Spectphotometry
GB/T 4698.7-1996 Sponge titanium, titanium and titanium alloys--Determination of nitrogen content--Distillation--Nessler reagent spectrophotometric method
GB/T 17134-1997 Soil quality--Determination of total arsenic--Silver diethyldithiocarbamate spectrophotometry
GB/T 11064.7-1989 Lithium carbonate,lithium hydroxide monohydrate and lithium chloride--Determination of iron content--1.10-phenanthroline spectrophotometric method
GB/T 6730.44-1986 Methods for chemical analysis of iron ores--The 1-(2-pyridylazo)-2-naphthol photometric method for the determination of zinc content
GB/T 21994.7-2008 Chemical analysis of magnesium fluoride.Part 7:Determination of iron content.Orthophenantholine photometric method
GB/T 22660.7-2008 Chemical analysis methods of lithium fluoride.Part 7:Determination of iron content.Orthophenantholine photometric method
GB/T 223.33-1994 Methods for chemical analysis of iron,steel and alloy. The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation
GB 223.33-1984 Methods for chemical analysis of iron,steel and alloy--The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation
GB/T 223.30-1994 Methods for chemical analysis of iron,steel and alloy. The arsenazo Ⅲ spectrophotometric method for the determination of zirconium content after separation by p-bromomandelic acid
GB/T 3257.5-1999 Methods for chemical analysis of bauxite--Determination of iron oxide content--Orthophenanthroline photometric method
GB/T 4374.2-1984 Methods for chemical analysis of magnesium powders and aluminum-magnesium alloy powders--The 1,10-phenanthroline photometric method for the determination of iron content
GB/T 8762.2-1988 Yttrium oxide and europium oxide of phosphor grade--Determination of calcium oxide content--N2O-C2H2 flame atomic absorption spectrophotometric method
GB/T 4325.7-2013 Methods for chemical analysis of molybdenum.Part 7:Determination of iron content.1,10-phenanthroline spectrophotometry and inductively coupled plasma atomic emission spectrometry
GB/T 11893-1989 Water quality--Determination of total phosphorus--Ammonium molybdate spectrophotometric method
GB/T 16484.4-2009 Chemical analysis methods of rare earth chloride and light rare earth carbonate.Part 4:Determination of thorium oxide content.ArsenazoⅢ spectrophotometry
GB/T 4375.1-1984 Methods for chemical analysis of gallium--The 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline photometric method for the determination of copper content
GB/T 6610.4-2003 Chemical analysis methods of aluminium hydroxide Determination of ferric oxide content-Orthophenanthroline photometric method
GB/T 4324.26-2012 Methods for chemical analysis of tungsten.Part 26:Determination of nitrogen content.Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry
GB 223.30-1984 Methods for chemical analysis of iron,steel and alloy--The arsenazo 3 photometric method for the determination of zirconium content after separation by p-bromomandelic acid
GB/T 16484.21-2009 Chemical analysis methods of rare earth chloride and light rare earth carbonate.Part 21:Determination of iron oxide content.1,10-phenanthroline spectrophotometry
GB/T 15507-1995 Water quality--Determination of hydrazine--p-Dime-tylaminobenzaldehyde spectrophotometric method
GB/T 16031-1995 Workplace air--Determination of ammonia--Messler's reagent spectrophotometric method
GB/T 6901.4-1986 Silica refractories--Determination of iron oxide content-0-phenanthroline photometric method
GB/T 11064.7-2013 Methods for chemical analysis of lithium carbonate,lithium hydroxide monohydrate and lithium chloride.Part 7:Determination of iron content.1,10-Phenanthroline spectrophotometric method
GB/T 7468-1987 Water quality--Determination of total mercury--Cold atomic absorption spectrophotometry
GB 7468-1987 Determination of Total Mercury in Water Quality by Cold Atomic Absorption Spectrophotometry
GB/T 6901.4-2004 Chemical analysis of silica refractories-Part 4:Determination of iron oxide-o-phenanthroline photometric method
GB/T 3286.4-2012 Methods for chemical analysis of limestone and dolomite.Part 4:The determination of iron oxide content.The o-phenanthroline spectrophotometric method and the flame atomic absorption spectrometric method
GB/T 16555.5-1996 Chemical analysis for silicon carbide refractories--Determination of ferric oxide--o-Phenanthroline photometric method
GB/T 8570.7-1988 Liquefied anhydrous ammonia--Determination of iron content--o-Phenanthroline spectrophotometric method
GB/T 14679-1993 Air quality. Determination of Ammonia. Sodium salicylate-sodium hypochlorite spectrophotometric method

RO-ASRO, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

STAS SR 13257-1996 COFFEE Determination of nitrogen content by the Kjeldahi method Spectrophotometric method
STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method
STAS SR 9763-13-1996 Spices and condiments. Determination of nitrogen content by the Kjeldahl method. Spectrophotometric method
STAS SR EN 10179-1994 Chemicat analysis of ferrous materials - Determination of nitrogen (trace amounts) in steel - Spectrophotometric method
SR ISO 6685:1996 Chemical products for industrial use-General method for determination of iron content - 1,10 - Phenanthroline spectrophotometric method
STAS SR 13385-1997 Leather - Determination of hydroxyproline - Spectrophotometrie analysis

Professional Standard - Machinery, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

JB/T 11938-2014 Ammonia-nitrogen automatic analyzers for laboratory.Nessler's reagent spectrophotometry
JB/T 9552.6-1999 Methods for chemical analysis of copper-chromium-zirconium alloys.The determination of zinconium by arsenazo Ⅲ photometric method after fuse with potassium phrosuifate

Professional Standard - Urban Construction, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

CJ/T 63-1999 Municipal sewage.Determination of aniline compounds.AZO spectrophotometric method
CJ/T 76-1999 Municipal sewage.Determination of nitrogen(nitrite).Sepectrophotometric method
CJ 26.13-1991 Municipal sewage water quality test method Determination of standard aniline Azo spectrophotometric method
CJ 26.26-1991 Municipal sewage water quality inspection method standard Determination of nitrite nitrogen spectrophotometric method
CJ/T 73-1999 Municipal sewage.Determination of total arsenic.Silver diethyldithiocarbamate spectrophotometric method
CJ/T 78-1999 Municipal sewage.Determination of total phosphorus.Spectrophotometric method

SE-SIS, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

SIS SS 02 81 86-1985 Determination of total arsenic in water - Silver diethyldithiocarbamate spectrometric method
SIS SS 18 71 60-1983 General method for the determination of arsenic - Silver diethyldithiocarbamate photometric method
SIS SS-EN 10 179-1989 Chemical analysis of ferrous materials — Determination of nitrogen (trace amounts) in steel — spectrophotometric method

American Society for Testing and Materials (ASTM), Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

ASTM UOP276-85 Pyrrole Nitrogen in Petroleum Distillates by Visible Spectrophotometry
ASTM D8083-16 Standard Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection
ASTM D5176-91(2003) Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection
ASTM D5176-91(1995) Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection
ASTM D5176-08 Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection
ASTM D5176-08(2015) Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection

Professional Standard - Agriculture, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

NY/T 30-1986 Determination of rare earth oxide content in soil.Chlorophosphonazo-p-hippuric acid photometric method
GB 6260-1986 Determination of Total Oxidized Rare Earth in Soil Spectrophotometric Method for Azochlorophosphorus Hippurate
NY/T 1116-2006 Fertilizers-Determination of nitrate nitrogen content.UItraviolet spectro-photometric method
SC/T 9444-2023 Determination of ammonia nitrogen in aquaculture water by gas phase molecular absorption spectrometry
NY/T 1373-2007 Determination of Sulfite in Edible Fungus Distill under Nitrogen with the Method of Spectrophotometer
NY/T 2332-2013 Determination of total sugars in red ginseng.Spectrophotometry
GB 8570.7-1988 Determination of the content of liquid anhydrous ammonium ferric o-phenanthroline spectrophotometric method

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

GB/T 6730.37-2017 Iron ores—Determination of cobalt content—4-[(5-chloro-2-pyridyl)azo]-1,3-diamino-benzene spectrophotometric method
GB/T 6730.44-2017 Iron ores—Determination of zinc content—1-(2-pyridylazo)-2-naphthol spectrophotometric method
GB/T 34176-2017 Chemical analysis methods for determination of Fe2+ and Fe3+ in refractory products by the spectral photometric method with 1,10-phenanthroline

IT-UNI, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

UNI 7336-1974 Chemical analysis of ferrous materials. Determination of nitrogen in steel. Spectrophotometric method.

Professional Standard - Non-ferrous Metal, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

YS/T 74.7-1994 Cadmium Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content
YS/T 536.2-2006 Bismuth Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content
YS/T 575.14-2006 Chemical analysis method of bauxite ore-tribromoarsine spectrophotometric determination of total rare earth oxides
YS/T 74.7-2010 Mehtods for chemical analysis of cadmium- Part 7:Determination of iron content- 1,10-Phenanthroline spectrophotometry
YS/T 372.18-2006 Methods for elementary analysis of precious alloy. Determination of gadolinium content. Chlorophosphonazo Ⅲ spectrophotometry
YS/T 372.19-2006 Methods for elementary analysis of precious alloy. Determination of yttrium content.Chlorophosphonazo Ⅲ spectrophotometry
YS/T 535.4-2006 Sodium fluoride chemical analysis method o-phenanthrene spectrophotometric determination of iron content
YS/T 535.4-2009 Chemical analysis methods of sodium fluoride.Part 4:Determination of iron content.1,10-phenanthroline spectrophotometric method
YS/T 520.5-2006 Gallium Chemical Analysis Method for Determination of Calcium by Nitrous Oxide-Acetylene Flame Atomic Absorption Spectrophotometry
YS/T 239.6-2010 Methods for chemical analysis of antimony trisulfide- Part 6:Determination of iron content-Neighbouring phenanthroline spectrophotometric method
YS/T 575.14-2007 Methods for chemical analysis of bauxite.Part 14:Determination the total content of rare earth oxide.Tribromo-arsenazo photometric method
YS/T 520.4-2006 Gallium Chemical Analysis Method 4,7-Diphenyl-1,10-Phenanthroline Spectrophotometric Determination of Iron Content
YS/T 520.4-2007 Chemical analysis of gallium.Part 4: Determination of iron content.The 4,7-diphenyl-1,10-phenanthroline spectrophotometric method
YS/T 520.2-2006 Gallium Chemical Analysis Method 4-(2-Pyridylazo)-Resorcinol Spectrophotometric Determination of Lead Content
YS/T 520.2-2007 Chemical analysis of gallium.Part 2: Determination of lead content.The 4-(2-pyridy lazo)-resorcinol spectrophotometric method
YS/T 746.16-2010 Methods for chemical analysis of lead-free tin-based solders- Part 16: Determination of total rare earth content- Arserazo Ⅲ spectrophotometry
YS/T 1075.1-2015 Methods for chemical analysis of vanadium-aluminium and molybdenum-aluminium master alloys.Part 1:Determination of iron content.1,10-Phenanthroline spectrophotometry
YS/T 575.5-2006 Bauxite ore chemical analysis method o-phenanthrene spectrophotometric determination of ferric oxide content
YS/T 581.7-2006 Determination of chemical contents and physical properties of aluminium fluoride Part 7:Determination of iron content by orthophenantholine photometric method
YS/T 273.7-2006 Chemical analysis methods and physical properties of cryolite. Part 7:Determination of iron content by orthophenantholine photometric method
YS/T 520.1-2007 Chemical analysis of gallium.Part 1:Determination of copper content.The 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline spectrophotometric method
YS/T 520.1-2006 Gallium chemical analysis method 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthrene-diazepine spectrophotometric determination of copper content
YS/T 534.4-2006 Aluminum Hydroxide Chemical Analytical Method for the Determination of Ferric Oxide by O-Phenanthrophenanthrene Spectrophotometry
YS/T 509.5-2008 Methods for chemical analysis of spodumene and lepidolite concentrates.Determination of ferric oxide content.O-phenanthroline photometric method and EDTA compleximetric method
YS/T 244.1-2008 Chemical analysis methods of high purity aluminum.Part 1: Determination of iron content by 1,10-phenanthroline-thiocyanate photometric method

国家市场监督管理总局、中国国家标准化管理委员会, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

GB/T 24583.5-2019 Vanadium-nitrogen—Determination of phosphorus content—Bismuth molybdenum blue spectrophotometric method
GB/T 223.37-2020 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation
GB/T 38386-2019 Gas analysis—Determination of oxynitride in gases—The method of Cavity Ring-Down Spectroscopy
GB/T 6437-2018 Determination of phosphorus in feeds—Spectrophotometry
GB/T 13747.6-2019 Methods for chemical analysis of zirconium and zirconium alloys—Part 6：Determination of copper content—2,9-Dimethyl-1,10-phenanthroline spectrophotometry

Professional Standard - Nuclear Industry, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

EJ/T 20172-2018 Determination of Nitrogen in Sodium Cooled Fast Neutron Breeder Reactor by Spectrophotometry
EJ/T 814-1994 Determination of Thorium in Uranium Ore PMBP Extraction and Separation of Arsenazo Ⅲ Spectrophotometry
EJ/T 20167-2018 Determination of nitrogen content in reprocessed uranium trioxide powder by distillation-Nessler reagent spectrophotometry
EJ 267.4-1984 Determination of uranium in low-grade uranium ore Tri-n-octylphosphine oxide (or trialkylphosphine oxide) extraction 2-(5-bromo-2-pyridylazo)-5-ethylaminophenol spectrophotometric method

工业和信息化部, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

YB/T 4582.3-2017 Determination of phosphorus content in silicon iron nitride bismuth phosphorus molybdenum blue spectrophotometry
YB/T 4582.6-2017 Determination of silicon ferromanganese nitride content sodium periodate spectrophotometry
YB/T 4566.6-2016 Determination of phosphorus content in vanadium iron nitride bismuth phosphorus molybdenum blue spectrophotometry
YB/T 5157-2016 Determination of iron in high-purity graphite products by phenanthroline spectrophotometry
YB/T 4582.2-2017 Determination of ferrochromium content in silicon nitride diphenylcarbazide spectrophotometric method
YB/T 4582.9-2017 Determination of titanium silicon nitride content diantipyrine methane spectrophotometry
YS/T 540.4-2018 Methods for chemical analysis of vanadium Part 4: Determination of iron content 1,10-phenanthroline spectrophotometric method
YS/T 424.3-2022 Methods for chemical analysis of titanium diboride powder Part 3: Determination of iron content 1,10-phenanthroline spectrophotometric method

Japanese Industrial Standards Committee (JISC), Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

JIS G 1228-2:2022 Iron and steel -- Determination of nitrogen -- Part 2: Spectrophotometric methods after ammonium distillation separation

PL-PKN, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

PN Z04009-03-1990 Air purity protection Tests for nitrogen compounds Determination of ammonia in work places by spectrophotometry in visible spectra] region, indopheno] method
PN Z04009-02-1991 Air purity protection Tests for nitrogen compounds Determination of ammonia in the atmosphere (imision) by photometric, indophenol method
PN EN 10179-1992 Chemical analysis of ferrous materials. Determination of nitrogen (trace amounts) in steels. Spectrophotometric method
PN Z04092-08-1989 Air purity protection Tests for nitric acid and nitrogen oxides Determination of nitrogen dioxide in ambient air (imision) by spectrophotometric method with passive sampling
PN-EN 17041-2018-07 P Fertilizers--Determination of boron in concentrations ≤ 10 % using spectrometry with azomethine-H

Professional Standard - Ferrous Metallurgy, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

YB/T 5157-1993 Determination of iron in graphite products of high purity by ortho-phenathroline photometric method
YB/T 5330-2009 Determination of Ferrovanadium Pentoxide Content O-Phenanthroline Spectrophotometry
YB/T 5330-2006 Vanadium pentoxide chemical analysis method o-phenanthroline spectrophotometric method for determination of iron content
YB/T 174.4-2000 Chemical analysis for silicon nitride bonded silicon carbide product.Determination of iron oxide content.o-Phenanthroline photometric method
YB/T 190.8-2014 Continuous casting powder.The determination of iron content.The o-phenanthroline spectrophotometric method and the flame atomic absorption method
YB/T 4013-1991 Method for chemical analysis of high-quality magnesia
YB/T 174.3-2000 Chemical analysis for silicon nitride bonded silicon carbide product.Determination of free silicon content.Molybdenum blue photometric method

Professional Standard - Aviation, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

HB 5297.17-2001 Chemical Analysis Method of Titanium Alloy AzoarsenicⅢ Spectrophotometric Determination of Zirconium Content
HB 5218.14-1995 Aluminum Alloy Chemical Analysis Method Tribromoarsine Spectrophotometric Determination of Total Rare Earth in Cerium Group
HB 5220.39-1995 Chemical Analysis Method of Superalloys PMBP Direct Extraction-ArsenazoⅢ Absorbance Spectrophotometry Determination of Total Rare Earth
HB 5297.13-1984 Determination of Cerium in Titanium Alloy Chlorophosphine Azo Ⅲ Absorption Spectrophotometry
HB 5297.20-2001 Chlorophosphine azo Ⅲ Spectrophotometric Method for Chemical Analysis of Titanium Alloy Determination of Cerium Content
HB 5422.23-1989 Determination of zirconium content by arsenazoⅢ absorptiophotometric method for chemical analysis of copper alloy
HB 5220.42-1995 Determination of Cerium Content by DBC-Arsenazo Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5220.43-1995 Determination of Lanthanum Content by DBC-Arsenazo Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5220.39-2008 Methods for chemical analysis of superalloys. Part 39: Determination of total rare earth content by PMBP direct extraction-arsenazo Ⅲ photometric method
HB/Z 5218.14-2004 Methods for chemical analysis of aluminium alloys-Part 14:Determination of the cerium subgroup of rare earth elements content by tribromoarsenazo spectrophtometric method
HB 5220.36-1995 Determination of Zirconium Content by Arsenazo Ⅲ Direct Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5220.42-2008 Methods for chemical analysis of superalloys. Part 42: Determination of cerium content by DBC-arsenazo photometric method
HB 5220.43-2008 Methods for chemical analysis of superalloys. Part 43: Determination of lanthanum content by DBC-arsenazo photometric method
HB 5220.38-1995 Extraction and Separation by Chemical Analysis Method of Superalloy - Determination of Cerium Content by ArsenazoⅢ Absorbance Spectrophotometry
HB 5219.19-1998 Determination of Cerium Content by Spectrophotometric Method of Tribromoarsine in Magnesium Alloy
HB 5220.48-1995 Superalloy Chemical Analysis Method Water Steam Distillation - Volumetric Method (or Absorptiometry) Determination of Nitrogen Content
HB 5220.36-2008 Methods for chemical analysis of superalloys. Part 36: Determination of zirconium content by arsenazo Ⅲ photometric method
HB 5220.38-2008 Methods for chemical analysis of superalloys. Part 38: Determination of cerium content by extraction separation-arsenazo Ⅲ photometric method
HB 5220.37-1995 Chemical analysis methods of superalloys Tantalum reagent-benzene extraction-ArsenazoⅢ Absorption photometry Determination of zirconium content
HB 5220.48-2008 Methods for chemical analysis of superalloys. Part 48: Determination of nitrogen content by water vapour distillation-volumetric method( or photometric method)
HB 5220.37-2008 Methods for chemical analysis of superal loys. Part 37: Determination of zirconium content by N-benzoyl-N-phenylhydroxylamine-benzene extraction-arsenazo Ⅲ photometric method
HB 5297.21-2001 Titanium alloy chemical analysis method copper iron reagent, copper reagent extraction separation - azochloric acid Ⅲ spectrophotometric determination of yttrium content

PT-IPQ, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

Professional Standard - Rare Earth, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

XB/T 601.7-1993 Lanthanum hexaboride chemical analysis method 1,10-phenanthrene-phenanthrene spectrophotometric determination of iron content

VN-TCVN, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

TCVN 6624-2-2000 Water quality.Determination of nitrogen.Part 1: Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
TCVN 6138-1996 Ambient air.Determination of the mass concentration of nitrogen oxides.Chemiluminescence method
TCVN 7172-2002 Stationary source emissions.Determination of the mass concentration of nitrogen oxides.Naphthylethylenediamine photometric method
TCVN 6182-1996 Water quality.Determination of total arsenic.Silver diethyldithiocarbamate spectrophotometry method

未注明发布机构, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DIN EN 14211:2005 Air quality — measurement method for determining the concentration of nitrogen dioxide and nitrogen monoxide using chemiluminescence
BS EN ISO 13395:1996(1998) Water quality — Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
BS EN 26595:1993(2008)*BS 6068-2.1:1993*ISO 6695:1982 Water quality — Determination of total arsenic — Silver diethyldithiocarbamate spectrophotometric method
GJB 8793.6-2015 Testing method for niobium-coated uranium dioxide microspheres used in submarine nuclear power plants - Part 6: Determination of nitrogen by distillation and separation - Nessler spectrophotometry

Professional Standard - Ocean, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

HY/T 0345-2022 Determination of seawater trace nitrite—Flow analysis,diazotization and spectrophotometric detection witha long path length flow cell
HY/T 0346-2022 Determination of seawater trace nitrate—Flow analysis,cadmium reduction,diazotization and spectrophotometric detection with a long path length flow cell

RU-GOST R, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

GOST 28647-1990 Rubber, raw and rubber latex. Determination of iron content. 1,10-phenanthroline photometric method
GOST 30181.5-1994 Mineral fertilizers. Method for determination of mass fraction of amide nitrogen in compound fertilizers (spectrophotocolorimetric method)
GOST 31584-2012 Milk. Spectrophotometric method for determination of total phosphorus content
GOST 31980-2012 Milk. Spectrometric method for determination of total phosphorus content
GOST 28902-1991 Animal feeding stuffs. Determination of total phosphorus content. Spectrophotometric method

Heilongjiang Provincial Standard of the People's Republic of China, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DB23/T 2963-2021 Determination of Trace Calcium Content in Natural Flake Graphite by Calcium-Arsenazo Ⅲ Spectrophotometric Method

Professional Standard - Energy, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

NB/SH/T 6014-2020 Determination of Nitrogenous Compounds in Middle Distillates by Gas Chromatography-Nitrogen Chemiluminescence Detection

水利部, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

SL/T 788-2019 Determination of total nitrogen, volatile phenols, sulfides, anionic surfactants and hexavalent chromium in water quality continuous flow analysis-spectrophotometry

ZA-SANS, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

SANS 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
SANS 11732:2006 Water quality - Determination of ammonium nitrogen - Method by flow analysis (CFA and FIA) and spectrometric detection

Association of German Mechanical Engineers, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

VDI 4301 Blatt 1-1997 Indoor air pollution measurement - Determination of the concentration of nitrogen dioxide - Manual photometric method (Saltzman)
VDI 2453 Blatt 1-1990 Gaseous air pollution measurement; determination of nitrogen dioxide concentration; photometric manual standard method (Saltzmann)
VDI 2453 Blatt 2-2002 Gaseous air pollution measurement - Measurement of concentration of nitrogen monoxide and nitrogen dioxide - Calibration of NO/NOx chemiluminescence analysers using gas phase titration

Professional Standard - Petrochemical Industry, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

SH/T 1499.3-1997 Pure adipic acid.Measurement of ammonia solution colour(in Pt-Co scale).Spectrophotometric method

GOSTR, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

GOST 28326.4-1989 Technical liquid ammonia. Determination of oil mass concentration by spectrophotometry method

Professional Standard - Meteorology, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

QX/T 217-2013 Determination of ammonia and ammonium in ambient air with indophenol blue spectrophotometry

中华人民共和国国家卫生和计划生育委员会, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

WS/T 55-1996 Urine.Determination of 4-aminophenol.Spectrophotometric method

Tianjin Provincial Standard of the People's Republic of China, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DB12/T 847-2018 Spectrophotometric method for the determination of total sugar in feed

Indonesia Standards, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

SNI 19-7117.5-2005 Exhaust gas emissions - Stationary sources - Part 5: Test methods of nitrogen oxides by phenol dissulphonic acid (PDS) using spectrophotometers
SNI 19-7119.2-2005 Ambient atmospheres - Part 2: Test methods of nitrogen dioxide (NO2) content by Griess Saltzman using spectrophotometers
SNI 19-7119.1-2005 Ambient atmospheres - Part 1: Test methods of ammonia (NH3) content by indophenols using spectrophometers

Professional Standard - Railway, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

TB/T 2544.3-1995 Quick Analysis Method for Corrosion Inhibitor in Cooling Water of Railway Diesel Locomotive Determination of Benzotriazole by UV Spectrophotometry

冶金工业部, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

YB 4013-1991 Chemical analysis method of high-quality magnesia, determination of iron oxide content by photometric method of phenanthroline

Professional Standard - Commodity Inspection, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

SN/T 0850-2000 Method for the determination of proline in honey for import and export.Spectrophotometry
SN/T 0481.9-2010 Methods for inspection of bauxite for export.Part 9:Determination of free iron content.1,10-Phenanthroline spectrophotometric method

AT-ON, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

ONORM EN 26595-1993 Water quality - Determination of total arsenic - Silver diethyldithiocarbamate spectrophotometric method (ISO 6595:1982)

Professional Standard - Hygiene , Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

WS/T 23-1996 Urine.Determination ofδ-aminolevulinic acid.Spectrophotometric method

Professional Standard - Electricity, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DL/T 1984-2019 Determination of Ammonia Content in Coal-fired Boiler Fly Ash by Spectrophotometry
DL/T 2374-2021 Determination of fugitive ammonia in flue gas of thermal power plant by indophenol blue spectrophotometric method

Professional Standard - Chemical Industry, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

HG/T 4327-2012 Reclaimed water.Determination of total iron content.Spectrophotometric method

农业农村部, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

NY/T 3676-2020 Determination of total triterpene content in Ganoderma lucidum by spectrophotometric method

Standard Association of Australia （SAA）, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

AS 2365.1.1:1990 Methods for the sampling and analysis of indoor air - Determination of nitrogen dioxide - Spectrophotometric method - Treated mesh/passive tube sampling procedures
AS 2365.1.1:1990(R2014)

Yunnan Provincial Standard of the People's Republic of China, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

DB53/T 625-2014 Determination of Total Phosphorus in Coking Sewage by Phosphomolybdenum Blue Spectrophotometry

Military Standard of the People's Republic of China-Commission of Science,Technology and Industry for National Defence, Spectrophotometric Determination of Total Nitrogen and Ammonium Nitrogen

GJB 5969.6-2007 Test methods for microsphere uranium dioxide with coated niobium for submarine nuclear power plant.Part 6: Determination of nitride by distillation.Nessler regent spedrophotometry