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Total Nitrogen Determination Method UV Spectrophotometry

Total Nitrogen Determination Method UV Spectrophotometry, Total:499 items.

In the international standard classification, Total Nitrogen Determination Method UV Spectrophotometry involves: Water quality, Soil quality. Pedology, Vocabularies, Fertilizers, Environmental protection, Burners. Boilers, Air quality, Organic chemicals, Ferrous metals, Sugar. Sugar products. Starch, General methods of tests and analysis for food products, Fuels, Non-metalliferous minerals, Radiation measurements, Products of the chemical industry, Tea. Coffee. Cocoa, Spices and condiments. Food additives, Wastes, Natural gas, Analytical chemistry, Farming and forestry, Non-ferrous metals, Biology. Botany. Zoology, Metalliferous minerals, Veterinary medicine, Optics and optical measurements, Tobacco, tobacco products and related equipment, Animal feeding stuffs, Lamps and related equipment, Body care equipment, Cereals, pulses and derived products, Pesticides and other agrochemicals, Inorganic chemicals, Milk and milk products, Test conditions and procedures in general, Insulating fluids, Rubber, Pharmaceutics, Electrical and electronic testing, Plastics, Testing of metals, Welding, brazing and soldering, Lubricants, industrial oils and related products, Measurement of fluid flow, Nuclear energy engineering, Ferroalloys, Meat, meat products and other animal produce, Power stations in general, Laboratory medicine, Materials and articles in contact with foodstuffs, Materials for the reinforcement of composites, Conducting materials, Non-destructive testing, Fruits. Vegetables, Solar energy engineering.


Professional Standard - Water Conservancy, Total Nitrogen Determination Method UV Spectrophotometry

  • SL 84-1994 Determination of nitrogen (nitrate)(Ultraviolet spectrophtometric method)
  • SL 93.2-1994 Determination of oil and grease (Vitraviolet spectrophotometric method)

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • 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 14422-1993 Analysis of water used in boiler and cooling system. Determination of benzotriazole. Ultraviolet spectrophotometry
  • GB/T 16077-1995 Workplace air--Determination of phosgene--Ultraviolet spectrophotometric method
  • GB/T 14571.4-2008 Ethylene glycol for industrial use.Determination of ultraviolet transmittance.Ultraviolet spectrophotometric method
  • GB/T 18932.6-2002 Method for the determination of glycerol contents in honey--UV spectrophotometric method
  • GB/T 23195-2008 Determination method of catalase in bee pollen by ultraviolet spectrophotometry
  • GB/T 12153-1989 Analysis of water used in boiler and cooling system--Determination for mineral oil--Ultraviolet spectrophotometry
  • GB/T 16055-1995 Workplace air--Determination of diphenyl-diphenyl ether--Ultraviolet spectrophotometric method
  • GB/T 11060.8-2012 Natural gas.Determination of sulfur compound.Part 8:Determination of total sulfur content by ultraviolet fluorescence method
  • GB/T 15438-1995 Ambient air--Determination of ozone--Ultraviolet photometric method
  • GB/T 34796-2017(英文版) Quantification and purity analysis of nucleic acid concentration in solution—Ultraviolet spectrophotometry
  • GB/T 20931.9-2007 Methods for chemical analysis of lithium Determination of nitrogen content Mercuric potassium iodide spectrophotometric method
  • GB/T 2136-1980 Determination of thallium content in cadmium--Crystal violet photometric method
  • GB/T 14423-1993 Analysis of water used in boiler and cooling system. 2-Mercaptobenzothiazole. Ultraviolet spectrophotometry
  • 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 20931.4-2007 Methods for chemical analysis of lithium Determination of iron content Orthopenanthroline spectrophotometric method
  • GB/T 7493-1987 Water quality--Determination of nitrogen (nitrite)--Spectrophotometric method
  • GB/T 4702.9-1985 Methods for chemical analysis of chromium metal--The crystal violet spectrophotometric method for the determination of antimony content
  • GB/T 4702.11-1985 Methods for chemical analysis of chromium metal--The alizarin violet spectrophotometric method for the determination of tin content
  • GB 4702.9-1985 Chromium Metal Chemical Analysis Method Crystal Violet Spectrophotometric Determination of Antimony Content
  • GB 4702.11-1985 Chromium Metal Chemical Analysis Method Alizarin Violet Spectrophotometry Determination of Tin Content
  • GB/T 6730.24-2006 Iron ores Determination of total rare earth contentd Chlorophosphonazo mA spectrophotometric method
  • GB/T 19611-2004 Tobacco and tobacco products Determination of maleic hydrazide residues UV Spectrophotometer Method
  • GB/T 8220.2-1998 Methods for chemical analysis bismuth--Determination of iron content--1,10-Phenanthroline photometric method
  • GB/T 6437-2002 Determination of phosphorus in feed--Spectphotometry
  • 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 4375.8-1984 Methods for chemical analysis of gallium--The ethyl violet photometric method for the determination of indium content
  • 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 20574-2006 Method for determination of total flavonoids in propolis. Colorimetric 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 14849.1-1993 Silicon metal.Determination of iron content.1,10-Phenanthroline spectrophotometric 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 11893-1989 Water quality--Determination of total phosphorus--Ammonium molybdate spectrophotometric method
  • 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 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 6912.1-1986 Determination of nitrate and nitrite - Nitrate UV photometric method
  • GB/T 13748.2-2005 Chemical analysis methods of magnesium and magnesium alloys.Determination of tin content.Pyrocatechol violet spectrophotometric method
  • 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 13748.9-2005 Chemical analysis methods of magnesium and magnesium alloys.Determination of iron content.Orthopenanthroline spectrophotometric method
  • 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 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 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 16032-1995 Workplace air--Determination of nitrogen oxides--Naphthyl ethylenediamine dihydrochloride 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 23278.2-2009 Methods for chemical analysis of sodium stannate.Part 2:Determination of iron content.1,10-phenanthroline photometric method
  • GB 6912.2-1986 Determination of nitrate and nitrite - Nitrite UV photometric method
  • GB/T 3253.2-2008 Methods for chemical analysis of antimony and antimony trioxide.Determination of iron content.Orthophenanthroline spectrophotometric 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 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 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 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 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/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/T 10574.13-1989 Tin-lead solders--Determination of phosphorus content--Phosphor-vanadium-molybdium poly acid-crystal violet spectrophotometric method
  • GB/T 13293.5-1991 Higher purity copper cathode.Determination of arsenic content.Heteropoly arsenomolybdic acid-crystal violet spectrophotometric method
  • GB/T 4918-1985 Waste water from manufacturing process--Determination of total nitro compounds--Spectrophotometric method
  • GB/T 223.70-2008 Iron,steel and alloy.Determination of iron contents. o-Phenanthroline spectrophotometric method
  • 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 2441.2-2001 Determination of urea Determination of biuret content Spectrophotometric method
  • GB/T 6912.1-1986 Methods for analysis of water for boiler and for cooling--The determination of nitrates and nitrites--Ultraviolet spectrophotometry for nitrates
  • 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 20975.4-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 4: Determination of iron content.Orthopenanthroline photometric method
  • GB/T 13293.6-1991 Higher purity copper cathode.Determination of phosphorus content.Heteropoly phosphato-vanadato-molybdicacid-crystal violet spectrophotometric method
  • GB/T 13747.23-1992 Zirconium and zirconium alloys--Determination of nitrogen content--Distillation--Nessler reagent spectrophotometric method
  • GB/T 4702.7-2016 Chromium metal.Determination of nitrogen content.Distillation-nessler reagent spectrophotometric method
  • GB/T 17136-1997 Soil quality--Determination of total mercury--Cold atomic absorption spectrophotometry
  • GB/T 7717.8-1994 Acrylonitrile for industrial use-Determination of content of total aldehydes-Spectrophotometric method
  • GB/T 15555.1-1995 Solid waste--Determination of total mercury--Cold atomic absorption spectrometry
  • GB/T 6912.2-1986 Methods for analysis of water for boiler and for cooling--The determination of nitrates and nitrites--Ultraviolet spectrophotometry for nitrites

Professional Standard - Environmental Protection, Total Nitrogen Determination Method UV Spectrophotometry

  • HJ 636-2012 Water quality.Determination of total nitrogen.Alkaline potassium persulfate digestion UV spectrophotometric method
  • HJ/T 346-2007 Water quality. Determination of nitrate-nitrogen. Ultraviolet spectrophotometry
  • HJ/T 42-1999 Stationary source emission.Determination of nitrogen oxide.Ultraviolet spectrophotometric method
  • HJ 756-2015 Determination of water quality butyl xanthate by UV spectrophotometry
  • HJ 970-2018 Water Quality Determination of Petroleum by UV Spectrophotometry (Trial)
  • HJ/T 31-1999 Stationary source emission.Determination of phosgene.Aniline ultraviolet spectrophotometric method
  • HJ 590-2010 Ambient air.Determination of ozone.Ultraviolet photometric method
  • HJ 1191-2021 Spectrophotometric method for the determination of water quality azide
  • 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 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 550-2009 Water quality.Determination of cobalt.5-CI-PADAB spectrophotometry
  • HJ 1051-2019 Soil Petroleum Determination Infrared 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 590-2010(XG1-2018) Determination of ambient air ozone UV photometry "No. 1 Amendment"
  • HJ/T 64.3-2001 stationary source emission.Determination of cadmium.p-Azobenzenediazoaminazobenzene sulfonic acid spectrophotometric method
  • 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 634-2012 Soil.Determination of ammonium, nitrite and nitrate by extraction with potassium chloride solution-spectrophotometric methods
  • HJ 712-2014 Solid waste.Determination of total phosphorus.Ammonium metamolybdate spectrophotometric method
  • HJ 745-2015 Soil-Determination of cyanide and total cyanide-Spectrometric method
  • HJ 491-2009 Soil quality.Determination of total chromium.Flame atomic absorption spectrometry
  • HJ 671-2013 Water quality.Determination of total phosphorus.Flow injection Analysis (FIA) and Ammonium molybdate spectrophotometry
  • HJ 811-2016 Water quality―Determination of total selenium―3,3′-Diaminobenzidine spectrophotometric method

Professional Standard - Agriculture, Total Nitrogen Determination Method UV Spectrophotometry

  • NY/T 1116-2006 Fertilizers-Determination of nitrate nitrogen content.UItraviolet spectro-photometric method
  • NY/T 1279-2007 Determination of Nitrate in Vegetables and Fruits UV-spectrophotometer
  • NY/T 4306-2023 Determination of activity of papaya and bromelain by ultraviolet spectrophotometry
  • NY/T 1799-2009 Determination of oxazolidinethione in rapeseed meal and feed Spectrometric method
  • 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 2332-2013 Determination of total sugars in red ginseng.Spectrophotometry
  • SN/T 5658.3-2023
  • NY/T 1373-2007 Determination of Sulfite in Edible Fungus Distill under Nitrogen with the Method of Spectrophotometer
  • DBJ440100/T 43-2009 Determination of Total Chromium in Water Quality Graphite Furnace Atomic Absorption Spectrophotometry

Shandong Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB37/T 4149-2020 Determination of water quality UV254 by ultraviolet spectrophotometry

Military Standard of the People's Republic of China-General Armament Department, Total Nitrogen Determination Method UV Spectrophotometry

Association Francaise de Normalisation, Total Nitrogen Determination Method UV Spectrophotometry

  • NF A06-555:2010 Steel - Determination of nitrogen content - Spectrophotometric method.
  • NF A06-555*NF EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
  • NF T75-122*NF ISO 4735:2002 Oils of Citrus - Determination of CD value by ultraviolet spectrometric analysis.
  • NF M41-020*NF ISO 17198:2015 Dimethyl ether (DME) for fuels - Determination of total sulfur - Ultraviolet fluorescence method
  • NF X20-518*NF ISO 20729:2018 Natural gas - Determination of sulfur compounds - Determination of total sulfur content by ultraviolet fluorescence method
  • NF ISO 20729:2018 Gaz natural - Détermination des composés soufrés - Détermination de la teneur en soufre total par la méthode par fluorescence UV
  • NF T20-286:1982 Nitric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method.
  • NF EN 14625:2013 Air ambiant - Méthode normalisée de mesurage de la concentration en ozone par photométrie U.V
  • NF ISO 13964:1999 Qualité de l'air - Dosage de l'ozone dans l'air ambiant - Méthode photométrique dans l'ultraviolet.
  • NF EN 14212:2013 Air ambiant - Méthode normalisée pour le mesurage de la concentration en dioxyde de soufre par fluorescence UV
  • 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 X43-064*NF EN 14625:2013 Ambient air quality - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • NF A06-323:1987 Chemical analysis of steels. Determination of nitrogen content. Molecular absorption spectrophotometric method.
  • NF ISO 17198:2015 DME comme carburants ou combustibles - Détermination de la teneur en soufre total - Méthode par fluorescence ultraviolet
  • NF T20-297:1971 Chemical analysis of sulphuric acid and oleum. Determination of ammoniacal nitrogen. Spectrophotometric method.
  • XP M07-115:2003 Petroleum products - Determination of Solvent Yellow 124 content in middle distillates - Method by extraction with hydrochloric acid and determination by UV-Visible spectrophotometry
  • XP CEN/TS 17784-1:2022 Engrais organo-minéraux - Identification des agents complexants - Partie 1 : méthode utilisant la spectrophotométrie UV-Vis et la gravimétrie
  • NF V03-613*NF EN ISO 3946:1994 Starches and derived products. Determination of total phosphorus content. Spectrophotometric method.
  • NF X43-339*NF ISO 11564:2000 Stationary source emissions - Determination of the mass concentration of nitrogen oxides - Naphthylethylenediamine photometric method.
  • NF EN 16318/IN1:2016 Engrais - Dosage des éléments trace - Dosage du chrome (VI) par spectrophotométrie (méthode A) et chromatographie ionique avec détection spectrophotométrique (méthode B)
  • NF EN 16318+A1:2016 Engrais - Dosage des éléments trace - Dosage du chrome (VI) par spectrophotométrie (méthode A) et chromatographie ionique avec détection spectrophotométrique (méthode B)

国家市场监督管理总局、中国国家标准化管理委员会, Total Nitrogen Determination Method UV Spectrophotometry

  • GB/T 14571.4-2022 Test method of ethylene glycol for industrial use—Part 4:Determination of ultraviolet transmittance—Ultraviolet spectrophotometric method
  • GB/T 11060.8-2020 Natural gas—Determination of sulfur compounds—Part 8:Determination of total sulfur content by ultraviolet fluorescence method
  • GB/T 6437-2018 Determination of phosphorus in feeds—Spectrophotometry
  • GB/T 37186-2018 Gas analysis—Determination of sulfur dioxide and nitrogen oxides—Ultraviolet differential optical absorption spectroscopy
  • 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

Ningxia Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB64/T 1515-2017 Determination of Total Glucosides in Sheep Placenta Capsules by Ultraviolet Spectrophotometry
  • DB64/T 1082-2015 Determination of total flavonoids content in wolfberry - spectrophotometric colorimetry

Group Standards of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • T/QAS 035-2021 Determination of nitrate in brine by ultraviolet spectrophotometry
  • T/GXAS 545-2023 Seawater—Rapid determination of petroleum on site—Ultraviolet spectrophotometric method
  • T/NAIA 0193-2023 Determination of Concentration and Purity of Single-chain Antibody Eukaryotic Expression Plasmid DNA by UV Spectrophotometry
  • T/CSTM 00198-2021 Graphene quantum dots—Determination of enzyme-like activities — Ultraviolet-visible spectrophotometry
  • T/QAS 082.3-2022 Chemical Analysis of Rock Salt and Glauber's Salt Part 3: Determination of Nitrate by Ultraviolet Spectrophotometry
  • T/CHES 15-2017 Determination of Total Nitrogen in Water Quality Gas Phase Molecular Absorption Spectrometry
  • T/NAIA 097-2021 Determination of total phenolic content in Lycium barbarum by spectrophotometric method
  • T/ZSA 39-2020 Characterization of Graphene - Work function - Ultraviolet photoelectron spectroscopy (UPS) method
  • T/ZGIA 002-2020 Graphene Test Methods Determination of Work Function Ultraviolet Photoelectron Spectroscopy
  • T/GDFDTAEC 03-2022 Determination of total ginsenosides in health food by Spectrophotometry
  • T/CHES 27-2019 Water Quality Determination of Ammonia Nitrogen Automatic Analysis Nessler's Reagent Spectrophotometry
  • T/ZCSIA 8-2023 Determination of total polyphenol content in sweet potato leaves by spectrophotometric method
  • T/QAS 046-2021 Determination of total iron, ferrous iron and ferric iron in brine by phenanthroline spectrophotometric method
  • T/GDFDTAEC 05-2022 Determination of total flavonoids in propolis health food by Spectrophotometry
  • T/GDFDTAEC 06-2022 Determination of total triterpenoids in Ganoderma lucidum health food by Spectrophoto

Korean Agency for Technology and Standards (KATS), Total Nitrogen Determination Method UV Spectrophotometry

  • KS M 2231-2010 Testing method for naphthalene type hydrocarbon contents in aviation turbine fuels by ultraviolet spectrophotometry
  • KS M 2231-1980 Testing method for naphthalene type hydrocarbon contents in aviation turbine fuels by ultraviolet spectrophotometry
  • KS H ISO 4735:2011 Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
  • KS H ISO 4735:2014 Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
  • KS D ISO 4945:2002 Steel-Determination of nitrogen content-Spectrophotometric method
  • KS D ISO 4945-2002(2017) Steel-Determination of nitrogen content-Spectrophotometric method
  • KS I ISO 13964:2004 Air quality-Determination of ozone in ambient air-Ultraviolet photometric method
  • KS I ISO 13964:2014 Air quality — Determination of ozone in ambient air — Ultraviolet photometric method
  • KS I ISO 10566-2008(2018) Water quality-Determination of aluminium-Spectrometric method using pyrocatechol violet
  • KS M ISO 17198:2021 Dimethyl ether(DME) for fuels — Determination of total sulfur, ultraviolet fluorescence method
  • KS I ISO 6332:2021 Water quality ― Determination of iron —Spectrometric method using 1,10-phenanthroline
  • 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 13964-2014(2019) Air quality — Determination of ozone in ambient air — Ultraviolet photometric method
  • KS E ISO 6607-2011(2016) Aluminium ores-Determination of total silicon content-Combined gravimetric and spectrophotometric method
  • KS M 9102-1996(2001) WATER QUALITY-DETERMINATION OF TOTAL MERCURY BY FLAMELESS ATOMIC ABSORPTION SPECTROMETRY(METHOD AFTER PRETREATMENT WITH ULTRAVIOLET RADITION)
  • KS H ISO 3946-2008(2018) Starches and derived products-Determination of total phosphorus content-Spectrophotometric method
  • 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 21258:2012 Stationary source emissions-Determination of the mass concentration of dinitrogen monoxide(N2O)-Reference method:Non-dispersive infrared method
  • KS H ISO 3946:2008 Starches and derived products-Determination of total phosphorus content-Spectrophotometric method

Professional Standard - Light Industry, Total Nitrogen Determination Method UV Spectrophotometry

  • QB/T 2334-1997 Qualitative determination of ultraviolet absorbers in cosmetics by ultraviolet spectrophotometry

Professional Standard - Geology, Total Nitrogen Determination Method UV Spectrophotometry

  • DZ/T 0064.59-1993 Groundwater Quality Examination Method Determination of Nitrate by Ultraviolet Spectrophotometry
  • DZ/T 0064.59-2021 Methods of Analytical Groundwater Quality Part 59: Determination of Nitrate by Ultraviolet 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
  • DZ/T 0064.57-2021 Analytical Methods of Groundwater Quality Part 57: Determination of Ammonia Nitrogen by Nessler's Reagent Spectrophotometry

中华人民共和国环境保护部, Total Nitrogen Determination Method UV Spectrophotometry

  • GB 11894-1989 Water quality-Determination of total nitrogen-Alkaline potassium persulfate digestion-UV spectrophotometric method
  • GB 7493-1987 Water quality-Determination of nitrogen (nitrite)-Spectrophotometric method
  • GB 11893-1989 Water quality-Determination of total phosphorus-Ammonium molybdate spectrophotometric method
  • GB 7480-1987 Water quality-Determination of nitrate-Spectrophotometric method with phenol disulfonic acid
  • GB 4918-1985 Waste Water from manufacturing process-Determination of total nitro compounds-Spectrophotometric method

IN-BIS, Total Nitrogen Determination Method UV Spectrophotometry

German Institute for Standardization, Total Nitrogen Determination Method UV Spectrophotometry

  • 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 14625:2012-12 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry; German version EN 14625:2012 / Note: To be replaced by DIN EN 14625 (2022-11).
  • DIN EN 14625:2022-11 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry; German and English version prEN 14625:2022 / Note: Date of issue 2022-09-30*Intended as replacement for DIN EN 14625 (2012-12).
  • DIN ISO 13964:1999 Air quality - Determination of ozone in ambient air - Ultraviolet photometric method (ISO 13964:1998)
  • DIN ISO 13964:1999-12 Air quality - Determination of ozone in ambient air - Ultraviolet photometric method (ISO 13964:1998)
  • DIN EN 14212 Berichtigung 1:2014-08 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence; German version EN 14212:2012, Corrigendum to DIN EN 14212:2012-11 / Note: To be replaced by DIN EN 14212 (2022-11).
  • DIN EN 14212:2012-11 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence; German version EN 14212:2012 / Note: To be replaced by DIN EN 14212 (2022-11).
  • DIN EN 14212:2022-11 Ambient air - Standard method for the measurement of the concentration of sulfur dioxide by ultraviolet fluorescence; German and English version prEN 14212:2022 / Note: Date of issue 2022-09-30*Intended as replacement for DIN EN 14212 (2012-11), DIN EN...
  • DIN CEN/TS 17784-1:2022-07 Organo-mineral fertilizers - Identification of complexing agents - Part 1: Method using UV-Vis spectrophotometry and gravimetry; German version CEN/TS 17784-1:2022
  • 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

ES-UNE, Total Nitrogen Determination Method UV Spectrophotometry

  • UNE-EN ISO 4945:2019 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)
  • UNE-EN 14212:2013/AC:2014 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
  • UNE-CEN/TS 17784-1:2022 Organo-mineral fertilizers - Identification of complexing agents - Part 1: Method using UV-Vis spectrophotometry and gravimetry (Endorsed by Asociación Española de Normalización in May of 2022.)

KR-KS, Total Nitrogen Determination Method UV Spectrophotometry

  • KS D ISO 4945-2022 Steel — Determination of nitrogen — Spectrophotometric method
  • KS M ISO 17198-2021 Dimethyl ether(DME) for fuels — Determination of total sulfur, ultraviolet fluorescence method
  • KS I ISO 6332-2021 Water quality ― Determination of iron —Spectrometric method using 1,10-phenanthroline

Danish Standards Foundation, Total Nitrogen Determination Method UV Spectrophotometry

  • 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 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
  • DS/EN 14625:2012 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • DS/R 209:1980 Determination of oil and grease in water. Infrared spectrophotometric method
  • DS/EN 14212:2012 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
  • DS/EN 15486:2007 Ethanol as a blending component for petrol - Determination of sulfur content - Ultraviolet fluorescence method

Professional Standard - Petrochemical Industry, Total Nitrogen Determination Method UV Spectrophotometry

  • SH/T 1498.7-1997 Nylon 66 salt.Determination of UV index.Ultraviolet spectrophotometric method
  • SH/T 0662-1998 Mineral oil.Determination of ultraviolet absorbance
  • SH/T 0409-1992 Determination of Aromatics Content in Liquid Paraffin (UV Spectrophotometry)
  • SH/T 0181-2005 Standard test method for naphthalene hydrocarbons in jet fuels by ultraviolet spectrophotometry
  • SH/T 0181-1992 Method for Determination of Naphthalene Hydrocarbon Content in Jet Fuel (Ultraviolet Spectrophotometry)
  • SH/T 1498.5-1997 Nylon 66 salt.Determination of content of pseudo diaminocyclohexane.Ultraviolet spectrophotometric method
  • SH/T 0689-2000 Standard test method for determination of total sulfur in light hydrocarbons,motor fuels and oils by ultraviolet fluorescence

国家能源局, Total Nitrogen Determination Method UV Spectrophotometry

  • SH/T 0966-2017 Determination of aromatic hydrocarbon content in white oil by UV spectrophotometry

AENOR, Total Nitrogen Determination Method UV Spectrophotometry

  • UNE 55047:1973 FATS. SPECTROPHOTOMETRIC MEASURE OF ABSORPTION IN THE ULTRAVIOLET AREA.
  • UNE 84124:2014 Cosmetic raw materials. Determination of UV-filters by spectrophotometric absorbance.
  • UNE-EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
  • UNE-EN 14625:2013 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • UNE-EN 61228:2008 Method of measuring and specifying fluorescent ultraviolet lamps used for tanning
  • UNE 77221:2000 AIR QUALITY. DETERMINATION OF OZONE IN AMBIENT AIR. ULTRAVIOLET PHOTOMETRIC METHOD.
  • UNE-EN 14212:2013 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
  • UNE-EN 15486:2008 Ethanol as a blending component for petrol - Determination of sulfur content - Ultraviolet fluorescence method

RU-GOST R, Total Nitrogen Determination Method UV Spectrophotometry

  • GOST 16948-1979 Light sources, artificial. Method of determining ultraviolet radiation density energy flow
  • GOST ISO 4735-2015 Essential oils of citrus. Determination of CD value by ultraviolet spectrometric analysis
  • GOST 31980-2012 Milk. Spectrometric method for determination of total phosphorus content
  • GOST R EN ISO 20846-2006 Petroleum products. Determination of sulfur content by ultraviolet fluorescence method
  • GOST 28902-1991 Animal feeding stuffs. Determination of total phosphorus content. Spectrophotometric method
  • GOST 33343-2015 Aviation turbine fuels. Determination of naphthalene hydrocarbons by ultraviolet spectrophotometry method
  • GOST 17.1.4.02-1990 Water. Spectrophotometric determination of chlorophyll a
  • GOST R 56341-2015 Aromatic hydrocarbons and related chemicals. Determination of total sulfur by method of ultraviolet fluorescence

Professional Standard - Railway, Total Nitrogen Determination Method UV Spectrophotometry

  • TB/T 2544.3-1995 Quick Analysis Method for Corrosion Inhibitor in Cooling Water of Railway Diesel Locomotive Determination of Benzotriazole by UV Spectrophotometry
  • TB/T 2544.2-1995 Quick Analysis Method for Corrosion Inhibitor in Cooling Water of Railway Diesel Locomotive Determination of Nitrite Ultraviolet Spectrophotometry

CZ-CSN, Total Nitrogen Determination Method UV Spectrophotometry

  • CSN 65 1025 Cast.10-1989 Sulphuric acid for industrial use. pectrophotometric method for the etermination of total nitrogen xides
  • CSN ISO 6332:1995 Water quality - Determination of iron - Spectrometric method using 1,10-phenantroline
  • CSN 56 0186-8-1995 Methods of test for beer. Colour determination by spectrophotometric method
  • CSN EN 10 179-1993 Chemical analysis of ferrous metals — Determination of nitrogen (trace amounts) in steels — Spectrophotometric method

International Organization for Standardization (ISO), Total Nitrogen Determination Method UV Spectrophotometry

  • ISO 4735:2002 Oils of citrus - Determination of CD value by ultraviolet spectrometric analysis
  • ISO 4945:1977 Steel; Determination of nitrogen content; Spectrophotometric method
  • ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
  • ISO 13964:1998 Air quality - Determination of ozone in ambient air - Ultraviolet photometric method
  • ISO 20729:2017 Natural gas - Determination of sulfur compounds - Determination of total sulfur content by ultraviolet fluorescence method
  • ISO 4735:1981 Oils of citrus; Determination of CD value by ultraviolet spectrophotometric analysis
  • ISO 29441:2010 Water quality - Determination of total nitrogen after UV digestion - Method using flow analysis (CFA and FIA) and spectrometric detection
  • ISO 2991:1974 Nitric acid for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
  • ISO 6491:1980 Animal feeding stuffs; Determination of total phosphorus content; Spectrophotometric method
  • ISO 6332:1982 Water analysis — Determination of iron — 1,10-phenanthroline photometric method
  • ISO 3946:1982 Starches and derived products; Determination of total phosphorus content; Spectrophotometric method

RO-ASRO, Total Nitrogen Determination Method UV Spectrophotometry

  • STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen 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

中华全国供销合作总社, Total Nitrogen Determination Method UV Spectrophotometry

  • GH/T 1290-2020 Determination of the total content of Zanthoxylum amide in Zanthoxylum bungeanum and Zanthoxylum bungeanum processing products by UV spectrophotometry

CEN - European Committee for Standardization, Total Nitrogen Determination Method UV Spectrophotometry

  • EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
  • EN 14625:2005 Ambient air quality - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • EN 14212:2005 Ambient air quality - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence

British Standards Institution (BSI), Total Nitrogen Determination Method UV Spectrophotometry

  • 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
  • BS ISO 20729:2017 Natural gas. Determination of sulfur compounds. Determination of total sulfur content by ultraviolet fluorescence method
  • 23/30472739 DC BS EN 10179. Steels. Determination of nitrogen (trace amounts). Spectrophotometric method
  • PD CEN/TS 17784-1:2022 Organo-mineral fertilizers. Identification of complexing agents.. Method using UV-Vis spectrophotometry and gravimetry
  • BS EN 14625:2012 Ambient air. Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • 22/30450365 DC BS EN 14625. Ambient air. Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • BS EN 14625:2005 Ambient air quality - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • 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 62805-1:2017 Method for measuring photovoltaic (PV) glass - Measurement of total haze and spectral distribution of haze
  • 22/30450996 DC BS EN 14212. Ambient air. Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
  • BS EN 16318:2013 Fertilizers. Determination of trace elements. Determination of chromiumVI by photometry method A and by ion chromatography with spectrophotometric detection method B
  • BS 7020-13:1988 Analysis of iron ores. Method for the determination of arsenic content. Spectrophotometric method

European Committee for Standardization (CEN), Total Nitrogen Determination Method UV Spectrophotometry

  • EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
  • EN 14625:2012 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • prEN 14212 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
  • EN 14212:2012 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
  • EN 16318:2013 Fertilizers and liming materials - Determination of chromium(VI) by photometry (method A) and by ion chromatography with spectrophotometric detection (method B) (Incorporates Amandment A1: 2016)

American Society for Testing and Materials (ASTM), Total Nitrogen Determination Method UV Spectrophotometry

  • ASTM D1840-22 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM E2193-23 Standard Test Method for Ultraviolet Transmittance of Monoethylene Glycol (using Ultraviolet Spectrophotometry)
  • ASTM D7183-12 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D7183-07e1 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D7183-07 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D1840-03 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM D1840-01 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM D1840-96 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM D1840-02 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM D1017-51(1978)e1 Test Method for Benzene and Toluene in 250F and Lighter Petroleum Products by Ultraviolet Spectrophotometry
  • ASTM D1840-07 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM D1840-07(2013) Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM D7183-16 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM UOP495-00 Aromatics in Molex n-Paraffin Products by Ultraviolet Spectrophotometry
  • ASTM E878-12 Standard Test Method for Determination of Titanium in Iron Ores and Related Materials by Diantipyrylmethane Ultraviolet Spectrophotometry
  • ASTM UOP276-85 Pyrrole Nitrogen in Petroleum Distillates by Visible Spectrophotometry
  • ASTM E2193-04 Standard Test Method for Ultraviolet Transmittance of Monoethylene Glycol (Ultraviolet Spectrophotometric Method)
  • ASTM E2193-02a Standard Test Method for Ultraviolet Transmittance of Monoethylene Glycol (Ultraviolet Spectrophotometric Method)
  • ASTM E2193-02 Standard Test Method for Ultraviolet Transmittance of Monoethylene Glycol (Ultraviolet Spectrophotometric Method)
  • ASTM E2193-08 Standard Test Method for Ultraviolet Transmittance of Monoethylene Glycol (Ultraviolet Spectrophotometric Method)
  • ASTM D7183-23 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D3677-00 Standard Test Methods for Rubber--Identification by Infrared Spectrophotometry
  • ASTM D3677-10(2019) Standard Test Methods for Rubber--Identification by Infrared Spectrophotometry
  • ASTM D7183-18 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D7183-18a(2023) Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D7183-18a Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D7183-15 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D7183-18ae1 Standard Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet Fluorescence
  • ASTM D5453-05 Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Motor Fuels and Oils by Ultraviolet Fluorescence
  • ASTM D5453-03 Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Motor Fuels and Oils by Ultraviolet Fluorescence
  • ASTM D5453-03a Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Motor Fuels and Oils by Ultraviolet Fluorescence
  • ASTM E878-20 Standard Test Method for Determination of Titanium in Iron Ores and Related Materials by Diantipyrylmethane Ultraviolet Spectrophotometry
  • ASTM D1840-07(2017) Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
  • ASTM D5453-04 Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Motor Fuels and Oils by Ultraviolet Fluorescence
  • ASTM D6667-04(2010) Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
  • ASTM D5453-00 Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Motor Fuels and Oils by Ultraviolet Fluorescence
  • ASTM D5453-00e1 Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Motor Fuels and Oils by Ultraviolet Fluorescence
  • ASTM E1754-17 Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine By Infrared Spectrophotometry
  • ASTM E1754-17a Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine By Infrared Spectrophotometry
  • ASTM E1754-08 Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine By Infrared Spectrophotometry
  • ASTM D6667-21 Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
  • ASTM D6667-01 Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
  • ASTM D6667-14(2019) Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
  • ASTM D6667-04 Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
  • ASTM D6667-14 Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
  • ASTM D3124-98(2003) Standard Test Method for Vinylidene Unsaturation in Polyethylene by Infrared Spectrophotometry
  • ASTM D3124-98 Standard Test Method for Vinylidene Unsaturation in Polyethylene by Infrared Spectrophotometry
  • ASTM D3124-98(2019) Standard Test Method for Vinylidene Unsaturation in Polyethylene by Infrared Spectrophotometry
  • ASTM E1754-95(2001)e1 Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine By Infrared Spectrophotometry
  • ASTM E1754-95 Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine By Infrared Spectrophotometry
  • ASTM E1786-96 Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine by On-Line Infrared Spectrophotometry
  • ASTM E1786-02 Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine by On-Line Infrared Spectrophotometry
  • ASTM E1786-08 Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine by On-Line Infrared Spectrophotometry

PL-PKN, Total Nitrogen Determination Method UV Spectrophotometry

  • PN C97087-1987 UV Spectrophotometric determination of phenols in coke and waste waters
  • PN-ISO 20729-2020-10 P Natural gas -- Determination of sulfur compounds -- Determination of total sulfur content by ultraviolet fluorescence method
  • PN P04990-1989 Methods of chemical tests Knitted medical articles Determination of ultraviolet radiation absorbance
  • PN Z04200-02-1988 Air purity protection ests for oxalic acid etermination of oxalic acid by ltraviolet absorption spectrophotometry
  • PN-EN 17178-2020-01 P Liquid petroleum products--Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
  • PN C97088-1987 Coal derivative products UV spectrophotometric determination of tar acids content in coal tar and oils
  • PN EN 10179-1992 Chemical analysis of ferrous materials. Determination of nitrogen (trace amounts) in steels. Spectrophotometric method

国家质量监督检验检疫总局, Total Nitrogen Determination Method UV Spectrophotometry

  • SN/T 0859-2016 Determination of dehydroacetic acid in export seasonings by UV spectrophotometry
  • SN/T 4383-2015 Determination of polyvinyl alcohol (PVA) content in glutinous rice paper, food contact materials, by UV-visible spectrophotometry

Professional Standard - Non-ferrous Metal, Total Nitrogen Determination Method UV Spectrophotometry

  • YS/T 74.8-1994 Method for chemical analysis of cadmium Crystal violet spectrophotometric method for determination of thallium
  • YS/T 74.8-2010 Mehtods for chemical analysis of cadmium- Part 8:Determination of thallium content- Crystal violet spectrophotometry
  • 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 520.8-2007 Chemical analysis of gallium.Part 8:Determination of indium content.The ethyl violet spectrophotometric method
  • YS/T 520.8-2006 Gallium Chemical Analysis Method Ethyl Violet Spectrophotometric Determination of Indium Content
  • YS/T 74.7-2010 Mehtods for chemical analysis of cadmium- Part 7:Determination of iron content- 1,10-Phenanthroline spectrophotometry
  • YS/T 569.8-2015 Methods for chemical analysis of thallium.Part 8:Determination of indium content.Crystal violet benzene extraction 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 575.14-2006 Chemical analysis method of bauxite ore-tribromoarsine spectrophotometric determination of total rare earth oxides
  • YS/T 248.2-1985 Crude lead chemical analysis method Catechol violet photometric method Determination of tin 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 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 535.4-2006 Sodium fluoride chemical analysis method o-phenanthrene 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

Hebei Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB13/T 5028-2019 Determination of total sulfur content in alcohol-based fuels by ultraviolet fluorescence method
  • DB13/T 2589-2017 Infrared Spectrophotometric Method for Determination of Industrial Fume Concentration
  • DB13/T 2899-2018 Determination of iminodisuccinate content in urea by ultraviolet-visible spectrophotometry
  • DB13/T 2499.3-2017 Determination methods for liquid mixtures: Part 3: Determination of total phosphorus (ammonium molybdate spectrophotometric method)

Professional Standard - Commodity Inspection, Total Nitrogen Determination Method UV Spectrophotometry

  • SN/T 4117-2015 Determination of total volatile sulfur in liquefied petroleum gases and gaseous hydrocarbons by ultraviolet fluorescence
  • SN/T 4779.3-2017 Determination of total hardness in bottled water for export---Method by specrophotometry coupled with flow injection analysis(FIA)

Jiangsu Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB32/T 4344-2022 Determination of Oils in Marine Sediments Ultrasonic Extraction-Ultraviolet Spectrophotometry

Tianjin Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB12/T 884-2019 Determination of Polysaccharide Content in Lily Bulbs by UV/Vis Spectrophotometry
  • DB12/T 885-2019 Determination of Proanthocyanidins in Plant Extracts by UV/Vis Spectrophotometry
  • DB12/T 847-2018 Spectrophotometric method for the determination of total sugar in feed

TR-TSE, Total Nitrogen Determination Method UV Spectrophotometry

  • TS 3651-1981 METHODS FOR THE ANALYSIS OF WATER — DETERMINATION OF IRON CONTENT — 1,10 Phenanthroline Spectrophotometry 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, Total Nitrogen Determination Method UV Spectrophotometry

  • GB/T 34796-2017 Quantification and purity analysis of nucleic acid concentration in solution—Ultraviolet spectrophotometry
  • GB/T 36084-2018 Nanotechnology—Determination of copper, manganese and chromium ions in aqueous solution—Ultraviolet-visible spectrophotometry

Standard Association of Australia (SAA), Total Nitrogen Determination Method UV Spectrophotometry

  • AS 3753:2001 Recommended practice for chemical analysis by ultraviolet/visible spectrophotometry
  • AS/NZS 1050.18:1994 Methods for the analysis of iron and steel - Determination of phosphorus - Spectrophotometric method

Lithuanian Standards Office , Total Nitrogen Determination Method UV Spectrophotometry

  • LST EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
  • LST EN 14625-2012 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
  • LST EN 14212-2012 Ambient air - Standard method for the measurement of the concentration of sulphur dioxide by ultraviolet fluorescence
  • LST EN 15486-2007 Ethanol as a blending component for petrol - Determination of sulfur content - Ultraviolet fluorescence method
  • LST ISO 13964:1999 Air quality. Determination of ozone in ambient air. Ultraviolet photometric method (ISO 13964:1998)

Sichuan Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB51/T 1689-2013 Determination of total sulfur content in liquefied natural gas (LNG) by ultraviolet fluorescence method
  • DB51/T 1699-2013 Determination of total sulfur content in liquefied petroleum gas (LPG) by ultraviolet fluorescence method

International Electrotechnical Commission (IEC), Total Nitrogen Determination Method UV Spectrophotometry

  • IEC 61228:1993 Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning
  • IEC 61228/AMD1:1996 Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning; Amendment 1

YU-JUS, Total Nitrogen Determination Method UV Spectrophotometry

  • JUS H.B8.287-1983 Fertilizers. Determination of content amid-nitrogen. Spectrophotometric method
  • JUS C.A1.049-1989 Methods for chemical analysis of iron and steel. Determination of total silicon content between 0,05 and 1,0 %. Spectrophotometric method
  • JUS B.G8.518-1990 AluminiuB ores. Detemiuat ioa of total silicon content. Combived gravlmetric and spectrophotometric metbod
  • JUS H.B8.636-1981 Sulphuric acid for industrial u se. Determination of oxides of nitrogen. 2,4-xyleno/ spectrophotometric method
  • JUS C.A1.232-1990 Methods for chemical analysis of cadmium. Determination of copper content. Spectrophotometric method
  • JUS C.A1.234-1990 Methods for chemical analysis of cadinium. Determination of thallium content. Spectrophotometric method
  • JUS C.A1.239-1990 Methods for chemical analysis of cadmium. Determination of tin content. Spectrophotometric method
  • JUS H.F8.153-1986 Gases. Determination of carbon dioxid content. Infrared spectrophotometric method

Professional Standard - Urban Construction, Total Nitrogen Determination Method UV Spectrophotometry

  • CJ/T 63-1999 Municipal sewage.Determination of aniline compounds.AZO spectrophotometric method
  • CJ/T 78-1999 Municipal sewage.Determination of total phosphorus.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 26.28-1991 Municipal sewage water quality inspection method standard Determination of total phosphorus spectrophotometric method
  • CJ 26.26-1991 Municipal sewage water quality inspection method standard Determination of nitrite nitrogen spectrophotometric method

Universal Oil Products Company (UOP), Total Nitrogen Determination Method UV Spectrophotometry

  • UOP 495-2003 AROMATICS IN MOLEX PROCESS n-PARAFFIN PRODUCTS BY ULTRAVIOLET SPECTROPHOTOMETRY

BE-NBN, Total Nitrogen Determination Method UV Spectrophotometry

  • NBN T 91-257-1977 Water analysis methods - Determination of the nitrite nitrogen - Photoraetric method
  • NBN T 91-256-1977 Water analysis methods - Determination of the nitrate nitrogen -Photometric method with chromotropic acid
  • NBN T 03-041-1979 Nitric acid for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric 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 91-254-1976 Water analysis methods - Determination of the ammoniacal nitrogen -Direct photometric methodwith sodium phenate
  • NBN T 04-304-1983 Urea for indus trial use - Determination of iron content-2,2'-Bipyridyl photometric method

PT-IPQ, Total Nitrogen Determination Method UV Spectrophotometry

Professional Standard - Petroleum, Total Nitrogen Determination Method UV Spectrophotometry

  • SY/T 6009.9-2003 Test method of samples of geochemical exploration for oil and gas Part 9:Determination of the gross amount of aromatic hydrocarbons and their ramifications Ultraviolet spectroscopy

Hunan Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

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

Professional Standard - Aviation, Total Nitrogen Determination Method UV Spectrophotometry

  • HB 5220.39-1995 Chemical Analysis Method of Superalloys PMBP Direct Extraction-ArsenazoⅢ Absorbance Spectrophotometry Determination of Total Rare Earth
  • HB 5218.14-1995 Aluminum Alloy Chemical Analysis Method Tribromoarsine Spectrophotometric Determination of Total Rare Earth in Cerium Group
  • HB 5297.17-2001 Chemical Analysis Method of Titanium Alloy AzoarsenicⅢ Spectrophotometric Determination of Zirconium Content
  • 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 5422.12-1989 Copper alloy chemical analysis method crystal violet-toluene extraction absorptiometry for determination of antimony content
  • 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 5220.48-1995 Superalloy Chemical Analysis Method Water Steam Distillation - Volumetric Method (or Absorptiometry) Determination of Nitrogen Content

未注明发布机构, Total Nitrogen Determination Method UV Spectrophotometry

  • BS 684-1.15:1990(1999)*ISO 4656:1989 Methods of analysis of Fats and fatty oils — Part 1 : Physical methods — Section 1.15 Determination of ultraviolet absorbance
  • BS ISO 13964:1998(1999) Air quality — Determination of ozone in ambient air — Ultravioletphotometric method
  • DIN EN 14211:2005 Air quality — measurement method for determining the concentration of nitrogen dioxide and nitrogen monoxide using chemiluminescence

工业和信息化部, Total Nitrogen Determination Method UV Spectrophotometry

  • YS/T 540.4-2018 Methods for chemical analysis of vanadium Part 4: Determination of iron content 1,10-phenanthroline spectrophotometric method
  • 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

NL-NEN, Total Nitrogen Determination Method UV Spectrophotometry

  • NEN 2848-1986 Fruit juices - Determination of the total pectin content - Spectrophotometric method
  • 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

IT-UNI, Total Nitrogen Determination Method UV Spectrophotometry

  • UNI 7336-1974 Chemical analysis of ferrous materials. Determination of nitrogen in steel. Spectrophotometric method.
  • UNI 7691-1977

VN-TCVN, Total Nitrogen Determination Method UV Spectrophotometry

  • TCVN 7737-2007 Glass in building.Method for determination of light transmittance, light reflectance, total solar energy transmittance and ultraviolet transmittance
  • TCVN 7171-2002 Air quality.Determination of ozone in ambient air.Ultraviolet photometric method

Professional Standard - Chemical Industry, Total Nitrogen Determination Method UV Spectrophotometry

  • HG/T 3027-1988(1997) Determination of plasticizer content in polymethylmethacrylate-Ultraviolet spectrometry method
  • HG/T 3027-1988 Determination of plasticizer content in polymethylmethacrylate-Ultraviolet spectrometry method
  • HG/T 4327-2012 Reclaimed water.Determination of total iron content.Spectrophotometric method

Professional Standard - Rare Earth, Total Nitrogen Determination Method UV Spectrophotometry

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

ZA-SANS, Total Nitrogen Determination Method UV Spectrophotometry

  • SANS 13964:2004 Air quality - Determination of ozone in ambient air - Ultraviolet photometric method

Fujian Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB35/T 1351-2013 Determination of total sulfur content in gaseous hydrocarbons and liquefied petroleum gases by ultraviolet fluorescence method

农业农村部, Total Nitrogen Determination Method UV Spectrophotometry

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

NO-SN, Total Nitrogen Determination Method UV Spectrophotometry

  • NS 9803-1993 Water analysis. Determination of oil in water. Infrared spectrophotometric method

Professional Standard - Ferrous Metallurgy, Total Nitrogen Determination Method UV Spectrophotometry

  • YB/T 5330-2006 Vanadium pentoxide chemical analysis method o-phenanthroline spectrophotometric method for determination of iron content
  • YB/T 5157-1993 Determination of iron in graphite products of high purity by ortho-phenathroline photometric method
  • YB/T 5191-2007 High pure graphite materials-Determination of total rare earths content-spectrophotometric
  • YB/T 5191-1993 Spectrophotometric determination method of total rare earth element content in high-purity graphite materials
  • YB/T 5330-2009 Determination of Ferrovanadium Pentoxide Content O-Phenanthroline Spectrophotometry

Professional Standard - Nuclear Industry, Total Nitrogen Determination Method UV Spectrophotometry

  • 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

AT-ON, Total Nitrogen Determination Method UV Spectrophotometry

  • ONORM ISO 5666 Teil.2:1984 Water quality; determination of total mercury by flameless atomic absorption spectrometry; method after pretreatment with ultraviolett radiation
  • ONORM DIN 10324-1993 Determination of the total phosphorus content of cheese and processed cheese - Spectrometric method

Professional Standard - Electricity, Total Nitrogen Determination Method UV Spectrophotometry

  • DL/T 502.9-2006 Analytical methods of steam and water in power plants Part 9: Determination of aluminum (Spectrometric method using pyrocatechol violet)

Japanese Industrial Standards Committee (JISC), Total Nitrogen Determination Method UV Spectrophotometry

  • JIS G 1228-2:2022 Iron and steel -- Determination of nitrogen -- Part 2: Spectrophotometric methods after ammonium distillation separation
  • JIS K 2180-5:2013 Dimethylether (DME) for fuels -- Part 5: Determination of total sulfur -- Ultraviolet fluorescence method

Professional Standard - Hygiene , Total Nitrogen Determination Method UV Spectrophotometry

  • WS/T 36-1996 Urine.Determination of chromium.Spectrophotometric method
  • WS/T 43-1996 Urine.Determination of nickel.Spectrophotometric method
  • WS/T 48-1996 Urine.Determination of phenol.Spectrophotometric method
  • WS/T 52-1996 Urine.Determination of hippuric acid.Spectrophotometric method

Professional Standard - Energy, Total Nitrogen Determination Method UV Spectrophotometry

  • NB/SH/T 0917-2015 Standard test method for determination of total volatile sulfur in gaseous hydrocarbons and liquefied petroleum gases by ultraviolet fluorescence

Yunnan Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

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

Illuminating Engineering Society of North America, Total Nitrogen Determination Method UV Spectrophotometry

  • IESNA LM-78-2007 Method for Total Luminous Flux Measurement of Lamps Using an Integrating Sphere Photometer

BELST, Total Nitrogen Determination Method UV Spectrophotometry

  • STB 8058-2017 System for ensuring uniformity of measurements of the Republic of Belarus. Ultraviolet-visible-nearinfrared spectrophotometers. Methods of verification

Jilin Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB22/T 1668-2012 Spectrophotometric Determination of Total Ginsenosides in Ginseng Food

Xinjiang Provincial Standard of the People's Republic of China, Total Nitrogen Determination Method UV Spectrophotometry

  • DB65/T 4372-2021 Determination of Petroleum in Solid Waste Infrared Spectrophotometry

中华人民共和国国家卫生和计划生育委员会, Total Nitrogen Determination Method UV Spectrophotometry

  • WS/T 60-1996 Urine.Determination of pentachlorophenol.Spectrophotometric method

SE-SIS, Total Nitrogen Determination Method UV Spectrophotometry

  • SIS SS-EN 10 179-1989 Chemical analysis of ferrous materials — Determination of nitrogen (trace amounts) in steel — spectrophotometric method




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