ZH
RU
ES

Four types of water total nitrogen

Four types of water total nitrogen, Total:143 items.

In the international standard classification, Four types of water total nitrogen involves: Water quality, Analytical chemistry, ENVIRONMENT. HEALTH PROTECTION. SAFETY, Fertilizers, Inorganic chemicals, Test conditions and procedures in general, Hydraulic construction, Character sets and information coding, Fishing and fish breeding, Spices and condiments. Food additives, Vocabularies, Materials for aerospace construction, Milk and milk products, Air quality, Products of the chemical industry, Fruits. Vegetables, Beverages, Meat, meat products and other animal produce, Protection against crime.

HU-MSZT, Four types of water total nitrogen

MNOSZ 448-27.lap-1955

PL-PKN, Four types of water total nitrogen

PN C04576 ArkusZ14-1973 Water and w?sie water Tes?s for nitrogen Calcula?ion of to?al nitrogen
PN C04576 ArkusZ12-1973 Water and waste water Tests for nitrogenDetermination of total nitrogen of Kjeldahl

Jiangsu Provincial Standard of the People's Republic of China, Four types of water total nitrogen

DB32/T 4541-2023 Sea water quality evaluation guide for total nitrogen and total phosphorus

Group Standards of the People's Republic of China, Four types of water total nitrogen

T/QAS 071-2021 Determination of total nitrogen in brine Kjeldahl method
T/CHES 15-2017 Determination of Total Nitrogen in Water Quality Gas Phase Molecular Absorption Spectrometry

National Metrological Verification Regulations of the People's Republic of China, Four types of water total nitrogen

JJG 1094-2013 Water Quality On-line Analyzers of Total Phosphorus and Total Nitrogen

NL-NEN, Four types of water total nitrogen

NEN 6642-1992 Water-Calculation of total nitrogen content
NEN 6482-1982 Water - Determination of the sum of ammoniacal and organically bound nitrogen according to Kjeldahl after mineralization with selenium
NEN 6481-1983 Water - Determination of the sum of ammoniacal and organically bound nitrogen according to Kjeldahl after mineralization with selenium
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

Taiwan Provincial Standard of the People's Republic of China, Four types of water total nitrogen

CNS 3944-1976 Method for Determination of Total Kjeloahl Nitrogen in Polluted and Waste Water
CNS 9430-1982 Method of Test for Beverage: Determination of Total Solids and Moisture

ZA-SANS, Four types of water total nitrogen

SANS 5922:1978 Total moisture content of coal (nitrogen-oven method)
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

American Society for Testing and Materials (ASTM), Four types of water total nitrogen

ASTM D3590-11 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-02 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-17 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D8001-16e1 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D8001-16 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D3590-02(2006) Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-89(1994)e1 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D8083-16(2023) Standard Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection
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 D5176-20 Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis 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

Heilongjiang Provincial Standard of the People's Republic of China, Four types of water total nitrogen

DB23/T 3310-2022 Water quality total nitrogen monitoring technical specification
DB23/T 2668-2020 Technical regulations for staged diagnosis of total nitrogen fertilizer control in rice

Professional Standard - Agriculture, Four types of water total nitrogen

SL/T 788.1-2019 Part 1: Determination of total nitrogen in water quality
NY/T 1977-2010 Water-suluble fertilizers-Determination of total nitrogen, phosphorus and potassium content
水产品质量安全检验手册 1.4.1.0-2005 Chapter 1 General Introduction Section 4 Inspection Rules for Aquatic Products 1. General Rules for Hygienic Physical and Chemical Inspection of Aquatic Products (GBT 5009.1-2003)
水产品质量安全检验手册 1.4.2.0-2005 Chapter 1 General Introduction Section 4 Inspection Rules for Aquatic Products 2. General Rules for Microbiological Inspection of Aquatic Products (GBT 4789.1-2003)
水产品质量安全检验手册 6.14.1.4-2005 Chapter 6 Inspection of elements in aquatic products Section 14 Determination of total arsenic and inorganic arsenic in aquatic products (GBT 5009.11-2003) 1. Determination of total arsenic (4) Borohydride reduction colorimetric method
水产品质量安全检验手册 4.1.1.4-2005 Chapter 4 Inspection of Toxic Substances in Aquatic Products Section 1 Overview 1. Types of red tide algae toxins (4) Neurotoxic shellfish toxins
水产品质量安全检验手册 1.4.3.1-2005 Chapter 1 General Introduction Section 4 Aquatic Product Inspection Rules 3. Aquatic Product Sampling Methods (1) Sample Collection
水产品质量安全检验手册 1.2.4.4-2005 Chapter 1 General Introduction Section 2 Analytical Methods for Aquatic Product Inspection 4. Physicochemical Analysis (4) Atomic Fluorescence Spectrometry
水和废水监测分析方法 5.2.4-2003 Chapter 5 Water and Wastewater Biological Monitoring Methods Chapter 2 Bacteriological Determination in Water 4 Determination of Total Bacteria in Water (B)
水产品质量安全检验手册 4.4.0.0-2005 Chapter 4 Testing of Toxic Substances in Aquatic Products Section 4 Determination of Shellfish Amnestic Shellfish Toxin Domoic Acid (GBT 5009.198-2003)
水产品质量安全检验手册 1.4.3.2-2005 Chapter 1 General Introduction Section 4 Aquatic Product Inspection Rules 3. Aquatic Product Sampling Method (2) Aquatic Product Sampling Method (SCT 3016-2004)
NY/T 2010-2011 Determination of total flavonoids in citrus fruits and derived products
水产品质量安全检验手册 6.14.1.3-2005 Chapter 6 Inspection of elements in aquatic products Section 14 Determination of total arsenic and inorganic arsenic in aquatic products (GBT 5009.11-2003) 1. Determination of total arsenic (3) Arsenic spot method
水产品质量安全检验手册 6.14.1.2-2005 Chapter 6 Inspection of elements in aquatic products Section 14 Determination of total arsenic and inorganic arsenic in aquatic products (GBT 5009.11-2003) 1. Determination of total arsenic (2) Silver salt method
水和废水监测分析方法 4.2.5-2003 Chapter 4 Organic Pollutants Chapter 2 Determination of Organic Pollution Categories 5 Total Organic Halides (TOX) (c)
SZDB/Z 323-2018 Determination of 21 kinds of sulfonamides, chloramphenicols, tetracyclines, nitrofurans, quinolones and malachite green in aquaculture water by high performance liquid chromatography-tandem mass spectrometry

Danish Standards Foundation, Four types of water total nitrogen

DS 223:1991 Water analysis. Determination of the sum of nitrite- and nitrate-nitrogen
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 1207:2005 Chemicals used for treatment of water intended for human consumption - Tetrapotassium pyrophosphate
DS/EN 1206:2005 Chemicals used for treatment of water intended for human consumption - Tetrasodium pyrophosphate
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 1204:2005 Chemicals used for treatment of water intended for human consumption - Calcium tetrahydrogen bis (ortophosphate)

NO-SN, Four types of water total nitrogen

NS 4745-1991 Water analysis - Determination of the sum of nitrite nitrogen and nitrate nitrogen
NS 4743-1993 Water analysis. Determination of total nitrogen after oxidation with peroxodisulphate
NS 4865-1983 Air quality - Determination of the sum of nitrite- and nitrate-nitrogen in precipitation

Japanese Industrial Standards Committee (JISC), Four types of water total nitrogen

JIS K 0102-2:2022 Testing methods for industrial water and industrial wastewater -- Part 2: Inorganic anions, ammonium ion, organic nitrogen, total nitrogen and total phosphorus
JIS K 0170-3:2011 Testing methods for water quality by flow analysis -- Part 3: Total nitrogen
JIS K 0170-3:2019 Testing methods for water quality by flow analysis -- Part 3: Total nitrogen
JIS D 1030:1998 Automobiles -- Analytical procedure for measurement of carbon monoxide, carbon dioxide, total hydrocarbons and oxides of nitrogen in exhaust gas

SE-SIS, Four types of water total nitrogen

SIS SS 02 81 86-1985 Determination of total arsenic in water - Silver diethyldithiocarbamate spectrometric method
SIS SS 02 81 33-1991 Determination of the sum of the nitrite and nitrate nitrogen content of water

Professional Standard - Environmental Protection, Four types of water total nitrogen

HJ/T 102-2003 The technical requirement for water quality automatic analyzer of total nitrogen
HJ/T 199-2005 Water quality Determination of tota-nitrogen Gas-phase molecular absorption spectrometry
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 550-2009 Water quality.Determination of cobalt.5-CI-PADAB spectrophotometry

Professional Standard - Urban Construction, Four types of water total nitrogen

CJ/T 77-1999 Municipal sewage.Determination of total nitrogen.Distillation and titration method
CJ 26.27-1991 Municipal sewage water quality inspection method standard Determination of total nitrogen Titration method after distillation

BE-NBN, Four types of water total nitrogen

NBN T 91-253-1976 Water analysis methods - Determination of the albuminoid nitrogen

RO-ASRO, Four types of water total nitrogen

STAS 9065/7-1974 MEAT AND MEAT PRODUCTS Determination of easyly hydrolisable nitrogen content

VN-TCVN, Four types of water total nitrogen

TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content
TCVN 6224-1996 Water quality.Determination of the sum of calcium and magnesium.EDTA titrimetric method

YU-JUS, Four types of water total nitrogen

JUS H.G8.447-1990 Reagents. Zine sulphate heptahydrate. Determination of total nitrogen content. Colorimetric method
JUS H.G8.298-1987 Reagents. Oxaiic acid dihydrate. Determination of total nitrogen content. Colorimetric metbod
JUS H.G8.261-1987 Reagents. Barium chloride dihydrate. Determination of total nitrogen content. Colorimetric method
JUS H.G8.064-1983 Reagents. Copper sulphate pentahydrate. Determination of total nitrogen content. Colorimetric method
JUS H.G8.280-1987 Reagents. lron(ll)sulphate heptahydrate. Determination of total nitrogen content. Colorimetric method
JUS H.G8.158-1984 Reagents. Sodium carbonate anhydrous and sodium carbonate decahydrate. Determination of total ni-trogen contont. Colorimetric method
JUS H.C8.218-1989 Pigments. Zine tetrahvdroxychromate. Determination of total matter soluble in water. Gravimetric method

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Four types of water total nitrogen

GB/T 23835.12-2009 Lithium perchlorate anhydrous.Part 12:Determination of total nitrogen content
GB/T 11894-1989 Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photometric method
GB/T 11889-1989 Water quality--Determination of aniline compounds--Spectrophotometric method with N-(1-naphthyl) ethylenediamine

International Organization for Standardization (ISO), Four types of water total nitrogen

ISO 21793:2020 Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb), dissolved bound nitrogen (DNb), total bound phosphorus (TPb) and dissolved boun
ISO 20236:2018 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion
ISO/CD 20236 Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TN b) and dissolved bound nitrogen (DN b) after high temperature catalytic oxidative combustion
ISO/DIS 20236:2023 Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TN b) and dissolved bound nitrogen (DN b) after high temperature catalytic oxidative combustion
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 23697-2:2023 Water quality — Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes — Part 2: Chromotropic acid colour reaction
ISO 23697-1:2023 Water quality — Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes — Part 1: Dimethylphenol colour reaction

Sichuan Provincial Standard of the People's Republic of China, Four types of water total nitrogen

DB51/T 2950-2022 Object coding of water conservancy projects in Sichuan Province

European Committee for Standardization (CEN), Four types of water total nitrogen

EN ISO 20236:2021 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO 20236:2018)
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
prEN ISO 20236:2021 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO 20236:2018)

Association Francaise de Normalisation, Four types of water total nitrogen

NF T90-236*NF EN ISO 20236:2021 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion
NF EN ISO 20236:2021 Qualité de l'eau - Dosage du carbone organique total (COT), carbone organique dissous (COD), azote lié total (TNb) et azote lié dissous (DNb) après combustion catalytique oxydante à haute température
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 T90-003:1984 Testing water - Determination of calcium and magnesium total content - Edta titrimetric method.
NF EN 1207:2005 Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Pyrophosphate tétrapotassique
NF EN 1206:2005 Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Pyrophosphate tétrasodique

British Standards Institution (BSI), Four types of water total nitrogen

BS EN ISO 20236:2021 Water quality. Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TN_b) and dissolved bound nitrogen (DN_b) after high temperature catalytic oxidative combustion
BS ISO 23697-2:2023 Water quality. Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Chromotropic acid colour reaction
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 ISO 23697-1:2023 Water quality. Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Dimethylphenol colour reaction
21/30426878 DC BS ISO 23697-2. Water quality. Determination of total nitrogen (TNb) in water using small-scale sealed tubes. Part 2. Chromotropic acid based method
21/30426875 DC BS ISO 23697-1. Water quality. Determination of total nitrogen (TNb) in water using small-scale sealed tubes. Part 1. Dimethylphenol based method

未注明发布机构, Four types of water total nitrogen

BS EN ISO 20236:2021(2022) Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion
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

ES-UNE, Four types of water total nitrogen

UNE-EN ISO 20236:2022 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO 20236:2018)

CZ-CSN, Four types of water total nitrogen

CSN 83 0540 Cast.13-1984 Chemical and physical analysis of waste water Determination of organic and total nitrogen
CSN 58 0703-7-1999 Testing methods of dehydrated products and seasonings - Part 7: Determinaton of total nitrogen

Korean Agency for Technology and Standards (KATS), Four types of water total nitrogen

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 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

AT-ON, Four types of water total nitrogen

OENORM EN ISO 20236:2021 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO 20236:2018)
ONORM M 6268-1984 Water Quality; determination of the sum of Calcium and Magnesium; EDTA titrimetric method

German Institute for Standardization, Four types of water total nitrogen

DIN EN ISO 20236:2023 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TN) and dissolved bound nitrogen (DN) after high temperature catalytic oxidative combustion (ISO 20236:2018)
DIN EN ISO 20236:2023-10 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TN<(Index)b>) and dissolved bound nitrogen (DN<(Index)b>) after high temperature catalytic oxidative combustion (ISO/DIS 2023...
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 1207:2005-06 Chemicals used for treatment of water intended for human consumption - Tetrapotassium pyrophosphate; German version EN 1207:2005
DIN 38413-8:2000-09 German standard methods for the examination of water, waste water and sludge - Single components (group P) - Part 8: Determination of nitrilotriacetic acid (NTA), ethylenedinitrilotetraacetic acid (EDTA) and diethylenetrinitrilopentaacetic acid (DTPA) ...
DIN EN 1206:2005-06 Chemicals used for treatment of water intended for human consumption - Tetrasodium pyrophosphate; German version EN 1206:2005
DIN EN 1204:2005-06 Chemicals used for treatment of water intended for human consumption - Calcium tetrahydrogen bis(orthophosphate); German version EN 1204:2005

水利部, Four types of water total nitrogen

SL/T 701-2021 General principles for classification and coding of water conservancy information
SL/T 213-2020 General Principles of Classification and Coding of Water Conservancy Objects

Professional Standard - Aquaculture, Four types of water total nitrogen

SC/T 1085-2006 Specification for the application of tetracyclines in aquaculture

Society of Automotive Engineers (SAE), Four types of water total nitrogen

SAE AMS3255-1995 Sealing Tape, Polytetrafluoroethylene, Expanded (EPTFE) Oil and Water Resistant

Lithuanian Standards Office , Four types of water total nitrogen

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 EN 1207-2005 Chemicals used for treatment of water intended for human consumption - Tetrapotassium pyrophosphate
LST EN 1206-2005 Chemicals used for treatment of water intended for human consumption - Tetrasodium pyrophosphate
LST EN 1204-2005 Chemicals used for treatment of water intended for human consumption - Calcium tetrahydrogen bis(orthophosphate)

Inner Mongolia Provincial Standard of the People's Republic of China, Four types of water total nitrogen

DB1508/T 136-2021 General Specification for Classification and Coding of Water Conservancy Information Resources

Standard Association of Australia （SAA）, Four types of water total nitrogen

AS 2300.1.2.2:1988 Methods of chemical and physical testing for the dairying industry - General methods and principles - Determination of nitrogen - Nitrogen fractions from milk
AS/NZS 3350.2.21/AMD 4:2006 SAFETY OF HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - Part 2.21: Particular requirements - Storage water heaters; Amendment No.4

AENOR, Four types of water total nitrogen

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 1206:2006 Chemicals used for treatment of water intended for human consumption - Tetrasodium pyrophosphate
UNE-EN 1207:2006 Chemicals used for treatment of water intended for human consumption - Tetrapotassium pyrophosphate
UNE-EN 1204:2006 Chemicals used for treatment of water intended for human consumption - Calcium tetrahydrogen bis(orthophosphate)

Chongqing Provincial Standard of the People's Republic of China, Four types of water total nitrogen

DB50/T 1363-2023 Water Quality Determination of Tetracycline Antibiotics by Liquid Chromatography-Tandem Mass Spectrometry

中华人民共和国环境保护部, Four types of water total nitrogen

GB 11889-1989 Water quality-Determination of auiline compounds-Spectrophotometric method with N-(1-naphthyl)echylenediamine

RU-GOST R, Four types of water total nitrogen

GOST 27082-2014 Canned and preserved from fish, water invertebrates, water mammals and algae. Methods for determination of total acidity

Professional Standard - Public Safety Standards, Four types of water total nitrogen

GA/T 1638-2019 Gas chromatography-mass spectrometry for detection of diazepam and other four benzodiazepines and their metabolites in urine in forensic science