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Nitrogen content in water quality

Nitrogen content in water quality, Total:498 items.

In the international standard classification, Nitrogen content in water quality involves: Milk and milk products, Water quality, Leather technology, Fertilizers, Analytical chemistry, Non-ferrous metals, Testing of metals, Soil quality. Pedology, Fuels, Products of the textile industry, Ferroalloys, Ferrous metals, Beverages, Cereals, pulses and derived products, Meat, meat products and other animal produce, Protection against fire, Air quality, Animal feeding stuffs, Radiation protection, Organic chemicals, Vocabularies, Food products in general, Radiation measurements, Products of the chemical industry, Petroleum products in general, Tobacco, tobacco products and related equipment, Inorganic chemicals, Test conditions and procedures in general, Cutting tools, Fruits. Vegetables, Farming and forestry, Crude petroleum, Coals, Pulps, Construction materials, Wood-based panels, Shipbuilding and marine structures in general, Metalliferous minerals, Paint ingredients, Semiconducting materials, Environmental protection, Non-metalliferous minerals, Physics. Chemistry, Conducting materials, Ceramics, Particle size analysis. Sieving, Microbiology.

FI-SFS, Nitrogen content in water quality

SFS 3029 E-1976 In the event of any differences in interpretation of this standard the Finnish version shall take precedence over this translation
SFS 5183-1986

British Standards Institution (BSI), Nitrogen content in water quality

BS EN ISO 8968-5:2002 Milk. Determination of nitrogen content. Determination of protein-nitrogen content
BS EN ISO 8968-4:2002 Milk. Determination of nitrogen content. Determination of non-protein nitrogen content
DD ENV 12260-1996 Water quality. Determination of nitrogen. Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
BS DD CEN/TS 15478:2006 Fertilizers - Determination of total nitrogen in urea
BS EN ISO 8968-4:2016 Milk and milk products. Determination of nitrogen content. Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
BS EN 15750:2010 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
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 23695:2023 Water quality. Determination of ammonium nitrogen in water. Small-scale sealed tube method
BS ISO 9697:2015 Water quality. Gross beta activity in non-saline water. Test method using thick source
BS ISO 9696:2007 Water quality - Measurement of gross alpha activity in non-saline water - Thick source method
BS ISO 9697:2008 Water quality - Measurement of gross beta activity in non-saline water - Thick source method
BS DD CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
BS EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
BS EN ISO 10695:2000 Water quality. Determination of selected organic nitrogen and phosphorus compounds. Gas chromatographic methods
BS EN ISO 20483:2006 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
21/30396472 DC BS ISO 23695. Water quality. Determination of ammonium nitrogen in water. Small-scale sealed tube method
BS EN ISO 20483:2013 Cereals and pulses. Determination of the nitrogen content and calculation of the crude protein content. Kjeldahl method
BS EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
PD CEN/TS 17762:2022 Inorganic fertilizers. Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content
BS ISO 24196:2022 Lignins. Determination of lignin content in kraft lignin, soda lignin, and hydrolysis lignin
BS DD CEN/TS 15560:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
BS EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
BS DD CEN/TS 15477:2006 Fertilizers - Determination of the water-soluble potassium content
PD CEN/TS 17761:2022 Inorganic fertilizers. Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content
BS 6068 Sec.3.2:1993 Water quality. Radiological methods. Measurement of gross beta activity in non-saline water
21/30398661 DC BS ISO 24196. Lignins. Determination of lignin content in kraft lignin, soda lignin, and hydrolysis lignin
BS 7755-5.2:1996 Soil quality. Physical methods. Determination of water content in the unsaturated zone. Neutron depth probe method
BS 7755-3.1:1994 Soil quality. Chemical methods. Determination of dry matter and water content on a mass basis by a gravimetric method

PL-PKN, Nitrogen content in water quality

PN C04576 ArkusZ14-1973 Water and w?sie water Tes?s for nitrogen Calcula?ion of to?al nitrogen
PN A86026-1990 Milk and dairy products Milk powdcr Determination of nitritc and nitrate contents
PN Z04075-1961 Speedy Me?hod for De?er mina?ion of Ni?rogen Oxyde* in Air
PN P22117-1992 Leathers. Determination of nitrogen content ammonium salts and "hide substance"
PN C04568-1971 Water and waste water Determination of methyl alcohol content
PN C04593-1971 Water and waste water Determination of formaldehyde content
PN C04587 ArkusZ02-1973 Water and waste water Tests for sodium Determination of sodium by titrimetric method
PN C04288-12-1987 Technical fats Methods of testing Determination of water content
PN C87070-03-1992 Fertilizers Test of arsenie, cadmium, lead and mercury in nitrogenous and phosphatic fertilizers Determination of arsenie
PN C87070-04-1992 Fertilizers Tests of arsenie, cadmium, lead and mercury in nitrogenous and phosphatic fertilizers Determination of cadmium
PN C87070-05-1992 Fertilizers Tests of arsenie, cadmium, lead and mercury in nitrogenous and phosphatic fertilizers Determination of lead
PN C87070-06-1992 Fertilizers Tests of arsenie, cadmium, lead and mercury in nitrogenous and phosphatic fertilizers Determination of mercury
PN Z04009-04-1993 Air purity protection. Tests for content of nitrogen and its compounds. Determination of nitrates in dust in ambient air (imission) by spectrophotometric method with sodium salicilate

VN-TCVN, Nitrogen content in water quality

TCVN 7373-2004 Soils quality.Index values of total nitrogen content in the soils of Vietnam
TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content
TCVN 3706-1990 Aquatic products.Method for the determination of nitrogen ammonia content
TCVN 3707-1990 Aquatic products.Method for the determination of amine ammonia nitrogen content
TCVN 6643-2000 Soil quality.Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
TCVN 3708-1990 Aquatic products.Method for the determination of nitrogen amino acid content
TCVN 6053-2011 Water quality.Measurement of gross alpha activity in non-saline water.Thick source method
TCVN 6219-2011 Water quality.Measurement of gross beta activity in non-saline water.Thick source method
TCVN 6645-2000 Soil quality.Determination of total nitrogen content by dry combustion ("elemental analysis")
TCVN 7877-2008 Water quality.Determination of mercury
TCVN 7253-2003 Tobacco and tobacco products.Determination of nitrogen protein content
TCVN 6648-2000 Soil quality.Determination of dry matter and water content on a mass basis.Gravimetric method
TCVN 4328-1-2007 Animal feeding stuffs.Determination of nitrogen content and calculation of crude protein content.Part 1: Kjeldahl method
TCVN 6654-2000 Soil quality.Determination of water content in the unsaturated zone.Neutron depth probe method

RO-ASRO, Nitrogen content in water quality

SR 184-25-1998 Ethyl alcohol. Determination of ammonia and azotic bases nitrogen content
SR ISO 4176:1981 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method
STAS 7312-1983 SURFACE AND RESIDUAL WATERS Determination of azote content
STAS 12200-1985 SLUDGES RESULTED FROM= SURFACE WATERS TREATMENT AND WASTE WATERS PURIFI- CATION Nitrogen content determination
STAS 9065/7-1974 MEAT AND MEAT PRODUCTS Determination of easyly hydrolisable nitrogen content
STAS 6346-1989 MILK Impurity degrt'e dctermination
STAS 5951-1983 VEGETABLES AND FrUJIT PHODLCTS Dctcrmination of net mass, total vegetable or fruit content and of single component content as against net mass
STAS 12303-1985 WATER Determination ol cesium 137 content
STAS 12293-1985 WATER Determination of 3 hydrogen (tritium) content
STAS 12218-1984 WATER Determination of iodine 131 content
STAS SR 12303-1997 Water - Determination of caesium 137 content
STAS 12031-1984 WATER Radon 222 content determination
STAS 7184/21-1982 SOILS Humus content determination
SR EN 322-1996 Wood - based panels. Determination of moisture content
STAS 6536-1987 DRINKING WATER Determination of dissolved oxygen content in water
SR 7877-1-1995 Water Quality. Determination of petroleum products content. Gravimetric method

NL-NEN, Nitrogen content in water quality

NEN 6642-1992 Water-Calculation of total nitrogen content
NEN 6646-1990 Water - Photometric determination of the content of ammonium nitrogen and of the sum of the contents of ammoniacal and organically bound nitrogen according to Kjeldahl by continuous flow analysis
NEN 2038-1979 Air quality - Calibration gas mixture of nitrogen monoxide in nitrogen - Gravimetric preparation
NEN 2044-1985 Air quahty - txhaust gases Wet chemical determination of nitrogen oxides content
NEN 6494-1984 Water - Enzymatic determination of urea content in swimming water
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 5748-1990 Soil - Determination of moisture content and dry matter content of air-dry soil

German Institute for Standardization, Nitrogen content in water quality

DIN EN 12260:2003 Water quality - Determination of nitrogen - Determination of bound nitrogen (TN<(Index)b>), following oxidation to nitrogen oxides; German version EN 12260:2003
DIN EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Part 4: Determination of the non-protein-nitrogen content (ISO 8968-4:2001); German version EN ISO 8968-4:2001
DIN EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001); German version EN ISO 8968-5:2001
DIN EN ISO 11905-1:1998 Water quality - Determination of nitrogen - Part 1: Method using oxidative digestion with peroxodisulfate (ISO 11905-1:1997); German version EN ISO 11905-1:1998
DIN EN 12135:1997-12 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
DIN CEN/TS 15750:2008 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version CEN/TS 15750:2008
DIN EN ISO 8968-4:2016-09 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method) (ISO 8968-4:2016); German version EN ISO 8968-4:2016
DIN ISO 14255:1998 Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant (ISO 14255:1998)
DIN ISO 11261:1997 Soil quality - Determination of total nitrogen - Modified Kjeldahl method (ISO 11261:1995)
DIN CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German version CEN/TS 15561:2007
DIN ISO 13878:1998 Soil quality - Determination of total nitrogen content by dry combustion ("elemental analysis") (ISO 13878:1998)
DIN EN ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2006); German version EN ISO 20483:2006
DIN EN 12135:1997 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
DIN EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method) (ISO 8968-4:2016); German version EN ISO 8968-4:2016
DIN CEN/TS 17762:2022-07 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content; German version CEN/TS 17762:2022
DIN CEN/TS 15560:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free; German version CEN/TS 15560:2007
DIN 1164-31:1990 Portland-, Iron Portland-, blast furnace- and trass cement; determination of granulated blast furnace slag content of iron Portland cement and blast furnace cement and trass content of trass cement
DIN 53780:2014 Pigments and extenders - Determination of matter soluble in water - Hexavalent chromium content
DIN 53780:2006 Pigments and extenders - Determination of matter soluble in water - Hexavalent chromium content
DIN CEN/TS 17761:2022-07 Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content; German version CEN/TS 17761:2022
DIN EN 13654-2:2002 Soil improvers and growing media - Determination of nitrogen - Part 2: Dumas method; German version EN 13654-2:2001
DIN ISO 11465:1996 Soil quality - Determination of dry matter and water content on a mass basis - Gravimetric method (ISO 11465:1993)
DIN ISO 14255:1998-11 Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant (ISO 14255:1998)

RU-GOST R, Nitrogen content in water quality

GOST 33045-2014 Water. Methods for determination of nitrogen-containing matters
GOST R 53219-2008 Soil quality. Determination of nitrogen in air-dry soils using calcium chloride solution
GOST 4192-1982 Drinking water. Methods for determination of mineral nitrogen-containing matters
GOST EN 15478-2013 Fertilizers. Determination of total nitrogen in urea
GOST 30181.3-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in fertilizers with nitrate nitrogen
GOST 32527-2013 Mineral nitrogen-containing substances. Determination in air and water
GOST EN 15750-2016 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
GOST 10671.4-1974 Reagents. Methods for determination of nitrogen compaunds impurity general content
GOST 30181.6-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in ammonium salts (in ammonium form, using the formaldehyde method)
GOST 23327-1998 Milk and milk products. Determination of mass part of total nitrogen by Kjeldahl method and determination of mass part of protein
GOST 23327-1978 Milk. Methods for determination of the total protein content
GOST EN 15561-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
GOST R 51438-1999 Fruit and vegetable juices. Kjeldahl method for determination of nitrogen content
GOST EN 15560-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide nitrate free
GOST R ISO 11465-2011 Soil quality. Determination of dry matter and water content on a mass by gravimetric method
GOST 30181.7-1994 Mineral fertilizers. Method for determination of total mass fraction of nitrogen in compound fertilizers (in ammonium and amide forms, using hypochlorite method)
GOST 19728.13-2001 Talc and talcomagnesite. Method for determination of chlorine ions in water extract
GOST 19728.13-1988 Talc and talcomagnesite. Method for determination of chlorine ions in water extract
GOST 32459-2013 White phosphorus. Determination in water by gas chromatography with nitrogen-phosphorus detector
GOST 30181.8-1994 Mineral fertilizers. Method for determination of mass fraction of ammonium nitrogen in compound fertilizers (chloramine method)
GOST 21119.2-1975 General methods of test for pigments and extenders. Determination of soluble in water matters mass fraction
GOST 28995-1991 Liquefied anhydrous ammonia for industrial use. Determination of water content. Gas chromatographic method

SE-SIS, Nitrogen content in water quality

SIS SS 02 81 33-1991 Determination of the sum of the nitrite and nitrate nitrogen content of water
SIS SS 02 81 01-1992 Nitrogen content of water — Determination with Kjeldahl method after reduction with Devarda's alloy
SIS 02 81 19-1974 Determination of calcium content of water
SIS 02 81 20-1974 Determination of chloride content of water
SIS 02 81 26-1974 Determination of orthophosphate content of water

International Organization for Standardization (ISO), Nitrogen content in water quality

ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
ISO 8968-5:2001|IDF 20-5:2001 Determination of milk nitrogen content Part 5: Determination of protein nitrogen content
ISO 8968-4:2001 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content
ISO 8968-5:2001 | IDF 20-5:2001 Milk — Determination of nitrogen content — Part 5: Determination of protein-nitrogen content
ISO 8968-4:2001|IDF 20-4:2001 Determination of milk nitrogen content Part 4: Determination of non-protein nitrogen content
ISO 5397:1984 Leather; Determination of nitrogen content and "hide substance"; Titrimetric method
ISO 8968-4:2016 | IDF 20-4:2016 Milk and milk products — Determination of nitrogen content — Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
ISO 8968-4:2001/Cor 1:2011 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content; Technical Corrigendum 1
ISO 5983:1979 Animal feeding stuffs; Determination of nitrogen content and calculation of crude protein content
ISO 23695:2023 Water quality — Determination of ammonium nitrogen in water — Small-scale sealed tube method
ISO 5397:1984 | IULTCS/IUC 10 Leather — Determination of nitrogen content and "hide substance" — Titrimetric method
ISO 9696:2007 Water quality - Measurement of gross alpha activity in non-saline water - Thick source method
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 20483:2013 Cereals and pulses.Determination of the nitrogen content and calculation of the crude protein content.Kjeldahl method
ISO 24196:2022 Lignins — Determination of lignin content in kraft lignin, soda lignin and hydrolysis lignin
ISO 7408:1983 Fertilizers; Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide; Titrimetric method
ISO 16979:2003 Wood-based panels - Determination of moisture content
ISO 5983-1:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method
ISO 10573:1995 Soil-quality - Determination of water content in the unsaturated zone - Neutron depth probe method
ISO 3087:2011 Iron ores - Determination of the moisture content of a lot
ISO/DIS 9795:1980 Lignins — Determination of inorganics content in kraft lignin, soda lignin and hydrolysis lignin
ISO/FDIS 9795:2023 Lignins — Determination of inorganics content in kraft lignin, soda lignin and hydrolysis lignin
ISO 14255:1998 Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
ISO 5983-2:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 2: Block digestion/steam distillation method
ISO/DTS 17234:2002 Leather - Chemical tests - Determination of certain azo colourants in dyded leathers
ISO 6058:1984 Water quality; Determination of calcium content; EDTA titrimetric method
ISO/CD 16094-3 Water quality — Analysis of plastics in water — Part 3: Thermo-analytical methods for waters with low content of natural suspended solids

BE-NBN, Nitrogen content in water quality

NBN V 21-013-1978 Determination of the total nitrogen contaimng substances content of milk - Amido black method
NBN T 94-301-1976 Determination of nitrogen dioxyde contents of ambient air -Griess-Saltzman method
NBN T 94-302-1976 Determination of nitrogen oxydes and of nitrogen monoxyde contents of ambient air - Griess-Saltzman method
NBN V 21-008-1977 Gravimetrie determination of the water content of dried milk
NBN 209-1950
NBN-EN 25663-1994 Water quality. Determination of kjeldahl nitrogen. Method after mineralization qith selenium (ISO 5663: 1984)

ES-AENOR, Nitrogen content in water quality

UNE 59-018-1986
UNE 80-217-1991 Methods of testing cement. Determination of the chloride, carbon dioxide and alcali content of cement
UNE 59-013-1986

Korean Agency for Technology and Standards (KATS), Nitrogen content in water quality

KS M ISO 5397-2002(2017) Leather－Determination of nitrogen content and “hide substance”－Titrimetric method
KS D 2555-2005 Methods for determination of nitrogen in tantalum
KS D 2530-2007 Methods for determination of nitrogen in titanium and titanium alloys
KS M ISO 5397:2002 Leather－Determination of nitrogen content and “hide substance”－Titrimetric method
KS D 1811-2003 Methods for determination of nitrogen in iron and steel
KS D ISO 4945-2002(2017) Steel－Determination of nitrogen content－Spectrophotometric method
KS B 5360-1990 Continuous Analysers for Oxides of Nitrogen in Ambient Air
KS B 5360-2001 Continuous Analysers for Oxides of Nitrogen in Ambient Air
KS I ISO 9696:2007 Water quality－Measurement of gross alpha activity in non-saline water－Thick source method
KS I ISO 13878:2009 Soil quality－Determination of total nitrogen content by dry combustion(“elemental analysis”)
KS M 2112-2011 Crude petroleum and petroleum products-Determination of nitrogen content
KS M ISO 5397-2002(2022) Leather－Determination of nitrogen content and “hide substance”－Titrimetric method
KS I ISO 13878-2009(2019) Soil quality－Determination of total nitrogen content by dry combustion(“elemental analysis”)
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 L 5502-1996 Testing method for water content of high aluminous plastic refractories and fireclay plastic refractories
KS L 5502-1986 Testing method for water content of high aluminous plastic refractories and fireclay plastic refractories
KS I ISO 10573-2005(2020) Soil quality－Determination of water content in the unsaturated zone(Neutron depth probe method)
KS F ISO 16979:2008 Wood-based panels－Determination of moisture content
KS F ISO 16979:2020 Wood-based panels — Determination of moisture content
KS E 3733-1989 Determination or Carbon Monoxide and Temperature in Combustion Gases of Holed Briquette
KS I ISO 11465-2005(2015) Soil quality－Determination of dry matter and water contenton a mass basis－Gravimetric method
KS I ISO 14255:2009 Soil quality－Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
KS I ISO 14255-2009(2019) Soil quality－Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
KS I ISO 10573:2005 Soil quality-Determination of water content in the unsaturated zone(Neutron depth probe method)
KS L 3413-2007 Testing method for moisture in graphite
KS I ISO 6058:2008 Water quality-Determination of calcium content (EDTA titrimetric method)
KS I ISO 6058-2008(2018) Water quality－Determination of calcium content (EDTA titrimetric method)

Association Francaise de Normalisation, Nitrogen content in water quality

NF V04-221-5:2002 Milk - Determination of nitrogen content - Part 5 : determination of protein-nitrogen content.
NF V04-221-4:2002 Milk - Determination of nitrogen content - Part 4 : determination of non-protein nitrogen content.
NF U42-191:1988 Fertilizers. Nitrogenous fertilizers containing synthetic organic nitrogen. Determination of the types of nitrogen.
NF U42-503*NF EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
NF T90-015:1975 TESTING WATER-DETERMINATION OF NITROGEN (AMMONIA)
NF X31-111*NF ISO 11261:1995 Soil quality. Determination of total nitrogen. Modified kjeldahl method.
NF EN ISO 8968-4:2016 Lait et produits laitiers - Détermination de la teneur en azote - Partie 4 : détermination de la teneur en azote protéique et non protéique et calcul de la teneur en protéines vraies (Méthode de référence)
NF U42-416*NF EN 15478:2009 Fertilizers - Determination of total nitrogen in urea.
NF V03-750:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method.
NF V04-407:2002 Meat, meat product and fishery products - Determination of nitrogen content and calculation of the protein content - Kjeldahl method.
NF V04-221-4*NF EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4 : determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
NF X31-418*NF ISO 13878:1998 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").
NF M60-815:2008 Water quality - Measurement of gross alpha activity in non-saline water - Thick source method.
NF M60-816:2008 Water quality - Measurement of gross beta activity in non-saline water - Thick source method.
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 ISO 13878:1998 Qualité du sol - Détermination de la teneur totale en azote par combustion sèche ("analyse élémentaire")
NF V76-134*NF EN 12135:1997 Fruit and vegetable juices. Determination of nitrogen content. Kjeldahl method.
NF X43-009:1973 Nitrogen dioxyde content of the atmosphere (griess saltzman reaction).
NF V18-100:1977 Animal feeding stuffs.determination of nitrogen for the calcultion of crude protein content.
NF V03-750*NF EN ISO 20483:2014 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
NF EN 25663:1994 Qualité de l'eau - Dosage de l'azote Kjeldahl - Méthode après minéralisation au sélénium
NF ISO 10573:1996 Qualité du sol - Détermination de la teneur en eau de la zone non saturée - Méthode à la sonde à neutrons de profondeur.
NF X31-115:2001 Soil quality - Sampling and storage of soil samples in view of determination of mineral nitrogen on fresh soil.
XP U42-794*XP CEN/TS 17762:2022 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content
NF X31-500*NF ISO 10573:1996 Soil quality. Determination of water content of the unsaturated zone. Neutron depth probe method.
NF V18-100-2*NF EN ISO 5983-2:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 2 : block digestion and steam distillation method.
NF V18-100-1*NF EN ISO 5983-1:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1 : Kjeldahl method
NF V18-109*NF ISO 6496:2011 Animal feeding stuffs - Determination of moisture and other volatile matter content.
NF EN 12880:2000 Caractérisation des boues - Détermination de la teneur en matière sèche et de la teneur en eau
NF X34-117:2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods.
NF U42-146*NF EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free.
XP CEN/TS 17762:2022 Engrais inorganiques - Détermination de la teneur en cuivre dans les engrais à base de nitrate d'ammonium et à forte teneur en azote
XP U42-793*XP CEN/TS 17761:2022 Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content
XP CEN/TS 17761:2022 Engrais inorganiques - Détermination de la teneur en chlorure des engrais à base de nitrate d'ammonium à forte teneur en azote
NF X31-102*NF ISO 11465:1994 Soil quality. Determination of dry matter and water content on a mass basis. Gravimetric method.
NF T90-309:1993 WATER QUALITY. EVALUATION IN AN AQUEOUS MEDIUM OF THE "ULTIMATE" AEROBIC BIODEGRADABILITY OF ORGANIC COMPOUNDS. METHOD BY DETERMINING THE OXYGEN DEMAND IN A CLOSED RESPIROMETER. (EUROPEAN STANDARD EN 29408).
NF Q03-093*NF EN 920:2000 Paper and board intended to come into contact with foodstuffs - Determination of dry matter content in an aqueous extract
NF U42-125:1985 Fertilizers. Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide. Titrimetric method.

ZA-SANS, Nitrogen content in water quality

SANS 8968-5:2006 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
SANS 8968-4:2006 Milk - Determination of nitrogen content Part 4: Determination of non-protein-nitrogen content
SANS 5250:2006 Water-soluble matter content of textiles
SANS 970:2010 Leather - Determination of nitrogen content and "hide substance" - Titrimetric method
SANS 5619:2001 Determination of water-soluble matter content in leather
SANS 5190:2004 Water insoluble matter content of soap products
SANS 5965:2006 Non-fibrous material content of textiles (alkali hydrolysis 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
SANS 5291:1987 Oxidizable matter in water for injections, limit test
SANS 6049:2004 Water - Suspended solids content
SANS 5742:1971 Sulphide sulphur content of cement
SANS 5855:2008 Free water content of aggregates
SANS 377:2005 Standard test methods for selenium in water
SANS 379:2005 Standard test method for antimony in water
SANS 381:2007 Standard test method for aluminium in water
SANS 382:2007 Standard test methods for iron in water
SANS 383:2007 Standard test methods for zinc in water
SANS 384:2007 Standard test methods for lead in water
SANS 5290:1975 Non-volatile matter content of solutions
SANS 5837:2002 Low density materials content of aggregates
SANS 16590:2000 Water quality - Determination of mercury - Methods involving enrichment by amalgamation
SANS 6310:2005 Sulfate content of water (turbidimetric method)
SANS 5223:2006 Rosin content of fatty matter in soaps
SANS 5979:1979 Non-volatile matter content of wax polishes

International Dairy Federation (IDF), Nitrogen content in water quality

IDF 20-5-2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
IDF 20-4-2001 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content
IDF/RM 25-2008 Milk and milk products - Determination of nitrogen content and crude protein calculation - Kjeldahl method

Danish Standards Foundation, Nitrogen content in water quality

DS/EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
DS/EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
DS 223:1991 Water analysis. Determination of the sum of nitrite- and nitrate-nitrogen
DS/EN 10179:1989 Chemical analysis of ferrous materials. Determination of nitrogen (trace amount) in steels. Spectrophotometric method
DS/ISO 10573:1997 Soil quality - Determination of water content in the unsaturated zone - Neutron depth probe method
DS 285:1990 Water qulity. Total arsenic content. Spectrophotometric method
DS 264:1982 Water quality. Determination of manganese in water, sludge and sediment by atomic absorption spectrophotometry in flame

CZ-CSN, Nitrogen content in water quality

CSN 65 4814-1976 Determinaíion of nitrogen oontent in fertilizers
CSN 65 7084-1983 Water-soluble matters contalned in asphalts
CSN 50 0393-1986 Determination of the content of or- ganic nitrogen in páper and paper- board
CSN 67 0541-1974 Determination of volatile matter content in pigments
CSN EN 10 179-1993 Chemical analysis of ferrous metals — Determination of nitrogen (trace amounts) in steels — Spectrophotometric method
CSN 83 0540 Cast.13-1984 Chemical and physical analysis of waste water Determination of organic and total nitrogen
CSN 44 1384-1978 Determination of total moisture content in coke
CSN ISO 665:1994 Oilseeds.Determination of moisture and volatile matter content.
CSN 80 0074-1981 Te-jtiles. "Dotermination of standard ary roass and moisturo content

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Nitrogen content in water quality

GB/T 42263-2022 Determination of nitrogen content in silicon single crystal—Secondary ion mass spectrometry method
GB/T 3597-2002 Fertilizer--Determination of nitrate nitrogen content--Nitron gravimetric method
GB/T 24583.3-2009 Vanadium-Nitrogen alloy.Determination of nitrogen content.The distillation-neutralization titration method
GB/T 5687.4-2016 Nitrogen-bearing ferrochromium and nitride ferrochrome with high nitrogen content.Determination of nitrogen content.The distillation-neutralization titration method
GB/T 42490-2023 Soil quality Determination of organic carbon content and carbon isotope ratio, total nitrogen content and nitrogen isotope ratio in soil and biological samples Stable isotope ratio mass spectrometry
GB/T 3600-2000 Fertilizers-Determination of ammoniacal nitrogen content-Formaldehyde method
GB/T 5511-2008 Cereals and pulses.Determination of the nitrogen content and calculation of the crude protein content.Kjeldahl method
GB/T 13598-1992 A method for the determination of agricultural chemical residues containing nitrogenous in tobacco leaves
GB/T 21704-2008 Determination of non-protein-nitrogen content in milk and dairy products
GB/T 42274-2022 Determination of the content and distribution of trace elements (magnesium, gallium) in aluminum nitride materials—Secondary ion mass spectrometry
GB/T 24318-2009 Determination of total nitrogen content in animal feeding stuffs by combustion according to the Dumas principle and calculation of the crude protein content
GB/T 23835.12-2009 Lithium perchlorate anhydrous.Part 12:Determination of total nitrogen content
GB/T 3598-1983 Fertilizers--Determination of urea nitrogen content--Urease method
GB/T 17767.1-1999 Determination of total nitrogen content for organic-inorganic compound fertilizers
GB 8858-1988 Method for determination of dry matter and moisture content in fruit and vegetable products
GB/T 8858-1988 Method for determination of dry matter and water content in fruit and vegetable products
GB/T 14605-1993 Determination of trace argon, nitrogen and krypton inoxygen. Gas chromatographic method
GB/T 3595-2000 Fertilizers-Determination of ammoniacal nitrogen content-Titrimetric method after distillation
GB/T 17674-2012 Determination of nitrogen in crude oil by boat-inlet chemiluminescence
GB/T 6435-2006 Determination of moisture and other volatile mater content in feeds
GB/T 17674-1999 Determination of nitrogen in petroleum and petroleum products by chemiluminescence method
GB/T 8572-2001 Determination of total nitrogen content for compound fertilizers-Titrimetric method after distillation
GB/T 10511-1989 The determination of total nitrogen content for nitrophosphate titrimetric method after distillation
GB/T 10511-2008 Determination of tatal nitrogen content for nitrophosphate.Titrimetric method after distillation
GB/T 8572-2010 Determination of total nitrogen content for compound fertilizers titrimetric method after distillation
GB/T 18856.12-2002 Test methods for quality of coal water mixture--Part 12: Determination of nitrogen of coal water mixture
GB/T 10209.1-2001 Determination of total nitrogen content for monoammonium phosphate and diammonium phosphate(Titrimetric method after distillation)
GB 9170-1988 Determination method of total nitrogen content in lubricating oil and fuel oil (improved Kjeldahl method)
GB/T 9170-1988 Lubricating oils and fuel oils--Determination of total nitrogen--Modified kjeldahl method
GB/T 5687.2-2007 Ferrochromium,silicochromium and nitrogen-bearing Ferrochromium-Determination of silicon content-The perchloric acid dehydration gravimetric method

Professional Standard - Agriculture, Nitrogen content in water quality

GB 3597-1983 Determination of nitrate nitrogen content in fertilizers Nitrogen reagent gravimetric method
GB 8572-1988 Determination of total nitrogen content in compound fertilizer
NY/T 1977-2010 Water-suluble fertilizers-Determination of total nitrogen, phosphorus and potassium content
GB 3598-1983 Determination of Urea Nitrogen Content in Fertilizers Urease Method
GB/T 42955-2023 Determination of total nitrogen content in fertilizers Dumas combustion method
GB 3595-1983 Determination of ammonia nitrogen content in fertilizers Titration method after distillation
NY/T 1116-2006 Fertilizers-Determination of nitrate nitrogen content.UItraviolet spectro-photometric method
GB 10511-1989 Determination of total nitrogen content in nitrophosphate fertilizers Titration after distillation
SN/T 5071-2018 Determination of 19 Non-protein Nitrogenous Compounds in Export Food by Liquid Chromatography-Mass Spectrometry/Mass Spectrometry
NY/T 1976-2010 Water-soluble fertilizers.Determination of organic matter content

Indonesia Standards, Nitrogen content in water quality

SNI 13-4721-1998 Methods for determination of total nitrogen content in soils
SNI 06-6323-2000 Determination of total nitrogen content in peat
SNI 7617-2013
SNI 06-1127-1989 Test method for iron content in water
SNI 06-1137-1989 Water, Test methods for zinc content
SNI 06-2913-1992 Test methods for arsenic content in water using atomic absorption spectrophotometer apparatus in borohydride sodium manuver
SNI 06-1130-1989 Test method for cadmium content in water
SNI 06-1133-1989 Water, Test method for manganese content
SNI 06-1138-1989 Water, Test methods for lead content
SNI 06-1132-1989 Test method for chromium content in water
SNI 19-1421-1989 Water and waste water, Test method for copper content
SNI 06-6989.14-2004 Water and waste water - Part 14: Test methods of dissolved oxygen by iodometry (azide modification)
SNI 19-1656-1989 Water and waste water, Test method for phenol content
SNI 7617 AMD 1-2014
SNI 19-1660-1989 Water and waste water, Test method for oil and fat content
SNI 06-3605-1994 Water analysis, Test methods of mercury by mercury analyzers
SNI 06-4159-1996 Test methods for carbon chloroform extract content in water by gravimetric methods
SNI 19-1663-1989 Water and waste water, Test method for sulphate content
SNI 19-1662-1989 Water and waste water, Test method for nitrite content
SNI 06-3415-1994 Water, Test methods for sulphite content by titrimetric methods
SNI 06-4138-1996 Test methods for soluble ferrous in water by spectrophotometer apparatus using fenantroline
SNI 03-6824-2002 Determination of cement content in cement aggregate by titration

VE-FONDONORMA, Nitrogen content in water quality

NORVEN 378

Japanese Industrial Standards Committee (JISC), Nitrogen content in water quality

JIS H 1685:1976 Methods for determination of nitrogen in tantalum
JIS G 1228:1997 Iron and steel -- Methods for determination of nitrogen content
JIS K 0104:2000 Methods for determination of nitrogen oxides in flue gas
JIS K 0104:1984 Methods for determination of oxides of nitrogen in flue gases
JIS K 0104:2011 Methods for determination of nitrogen oxides in flue gas
JIS K 6558-6:2016 Leather -- Determination of nitrogen content and "hide substance" -- Titrimetric method
JIS B 7953:1997 Continuous analysers for oxides of nitrogen in ambient air
JIS M 8818:1986 Method for determination of mineral matter in coal

AT-ON, Nitrogen content in water quality

ONORM DIN 10334-1994 Determination of nitrogen content of milk according to Kjeldahl and calculation of crude protein content
ONORM DIN 10322-1993 Determination of water content, solids-not-fat and fat contents of butter on the same test portion - Reference method
ONORM DIN 10321-1993 Determination of water content of dried milk
ONORM DIN 10317-1993 Determination of water content of butter
ONORM S 7009-1982 Testing of leather; determination of the contents of total nitrogen and of ammonium salts; calculation of hide substance
ONORM M 6261-1981 Water analysis; determination of calcium; titrimetric method

NO-SN, Nitrogen content in water quality

NS 4869-1985 Air quality - Nitrogen dioxide content in workplace atmosphere - Colometric metod
NS 4865-1983 Air quality - Determination of the sum of nitrite- and nitrate-nitrogen in precipitation
NS 4855-1981 Air quality - Determination of nitrogendioxide in ambient air

CEN - European Committee for Standardization, Nitrogen content in water quality

EN ISO 8968-4:2001 Milk - Determination of Nitrogen Content - Part 4: Determination of Non-Protein Nitrogen Content
EN ISO 5983-2:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 2: Block digestion/steam distillation method

工业和信息化部, Nitrogen content in water quality

YB/T 4582.7-2017 Determination of total nitrogen content of ferrous silicon nitride by neutralization titration method
YB/T 4566.2-2016 Determination of nitrogen content of vanadium iron nitride, distillation and separation-acid-base neutralization titration method
YB/T 4566.5-2016 Determination of vanadium ferrosilicon content by sulfuric acid dehydration gravimetric method
YB/T 4582.8-2017 Determination of silicon content in ferrosilicon nitride perchloric acid dehydration gravimetric method
YB/T 4779-2019 Determination of nitrogen content in vanadium-nitrogen alloys by pulse heating inert gas melting-time-of-flight mass spectrometry (conventional method)

国家市场监督管理总局、中国国家标准化管理委员会, Nitrogen content in water quality

GB/T 39144-2020 Test method for magnesium content in gallium nitride materials—Secondary ion mass spectrometry
GB/T 41153-2021 Determination of boron, aluminum and nitrogen impurity content in silicon carbide single crystal—Secondary ion mass spectrometry
GB/T 24583.3-2019 Vanadium-nitrogen—Determination of nitrogen content—Distillation-neutralization titration method
GB/T 17674-2021 Determination of nitrogen in crude oil—Boat-inlet chemiluminescence

National Sanitation Foundation (NSF), Nitrogen content in water quality

NSF 245A-2010 Wastewater Treatment Systems - Nitrogen Reduction

AR-IRAM, Nitrogen content in water quality

TN-INNORPI, Nitrogen content in water quality

European Committee for Standardization (CEN), Nitrogen content in water quality

EN ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
PD CEN/TS 15750:2008 Fertilizers - Determination of different forms of nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
EN ISO 13395:1996 Water Quality - Determination of Nitrite Nitrogen and Nitrate Nitrogen and the Sum of Both by Flow Analysis (CFA and FIA) and Spectrometric Detection
EN ISO 20483:2013 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
EN 12135:1997 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
FprCEN/TS 17762-2021 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content
EN ISO 20483:2006 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
EN ISO 5983-2:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 2: Block digestion and steam distillation method
FprCEN/TS 17761-2021 Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content

Lithuanian Standards Office , Nitrogen content in water quality

LST EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
LST EN 12135-2001 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
LST EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015)
LST ISO 5397:2001 Leather. Determination of nitrogen content and "hide substance". Titrimetric method (identical ISO 5397:1984)

AENOR, Nitrogen content in water quality

UNE-EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
UNE 59018:1986 LEATHER. DETERMINATION OF NITROGEN CONTENT AND "HIDE SUBSTANCE". TITRIMETRIC METHOD
UNE 77325:2003 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").
UNE 80602:2011 Determination of biomass fraction in waste tires used as alternative fuel in cement plants
UNE-ISO 11465:2011 Soil quality -- Determination of dry matter and water content on a mass basis -- Gravimetric method
UNE 77306:1999 SOIL QUALITY. DETERMINATION OF NITRATE NITROGEN, AMMONIUM NITROGEN AND TOTAL SOLUBLE NITROGEN IN AIR-DRY SOIL USING CALCIUM CHLORIDE SOLUTION AS EXTRACTANT.
UNE 77013:1989 WATER QUALITY. DETERMINATION OF CALCIUM CONTENT. EDTA TITRIMETRIC METHOD

Professional Standard - Ferrous Metallurgy, Nitrogen content in water quality

YB/T 4530-2016 Nitrogen-bearing ferromanganese.Determination of nitrogen content.The distillation-neutralization titration method

Standard Association of Australia （SAA）, Nitrogen content in water quality

AS ISO 8968.4:2021 Milk and milk products — Determination of nitrogen content, Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)

未注明发布机构, Nitrogen content in water quality

BS EN ISO 8968-4:2016(2017) Milk and milk products — Determination of nitrogen content Part 4 : Determination of protein and non - protein nitrogen content and true protein content calculation (Reference method)

ES-UNE, Nitrogen content in water quality

UNE-EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method) (ISO 8968-4:2016)
UNE-CEN/TS 17762:2022 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
UNE-CEN/TS 17761:2022 Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)

Professional Standard - Commodity Inspection, Nitrogen content in water quality

SN/T 0840-2015 Determination of nitrogen content of urea for import and export
SN/T 0840-1999 Method for the determination of nitrogen content of urea for import and export
SN/T 3097-2012 Determination of total nitrogen in fertelezers.Combustion
SN/T 3382-2012 Determination of non-protein-nitrogen content in milk and dairy products for export
SN/T 4302-2015 Rapid detection method of tris-(aziridyl)phosphine oxide in textiles by gas chromatography-mass spectrometry
SN/T 3810-2014 Determination of nitrogen content in urea and ammonium sulphate.X-ray fluorescence spectrometry

PT-IPQ, Nitrogen content in water quality

NP 1996-2000 Cereals and pulses Determiantion of the nitrogen content and calculation of the raw protein content Kjeldhal method
NP EN 12135-2000 Fruit and vegetable juices Determination of nitrogen content Kjeldahl method
E 211-1967
NP 1233-1976
NP 3779-1988 Leather Determination of nitrogen content and hide substance. Titrimetric method
E 250-1971
NP 4154-1991 Animal feeding stuffs Determination of volatile nitrogenous bases. Distillation méthod

American Society for Testing and Materials (ASTM), Nitrogen content in water quality

ASTM D6016-96 Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
ASTM D6016-96(2001) Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
ASTM D2868-17 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
ASTM D2868-07 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
ASTM D5475-93(1997) Standard Test Method for Nitrogen- and Phosphorus-Containing Pesticides in Water by Gas Chromatography with a Nitrogen-Phosphorus Detector
ASTM C1494-01 Standard Test Methods for Determination of Mass Fraction of Carbon, Nitrogen, and Oxygen in Silicon Nitride Powder
ASTM C1494-13(2018) Standard Test Methods for Determination of Mass Fraction of Carbon, Nitrogen, and Oxygen in Silicon Nitride Powder
ASTM D5475-93(2002) Standard Test Method for Nitrogen- and Phosphorus-Containing Pesticides in Water by Gas Chromatography with a Nitrogen-Phosphorus Detector
ASTM D3645-97 Standard Test Methods for Beryllium in Water
ASTM D3859-98 Standard Test Methods for Selenium in Water
ASTM D3559-08 Standard Test Methods for Lead in Water
ASTM E258-67(2002) Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method
ASTM D1607-91(2000)e1 Standard Test Method for Nitrogen Dioxide Content of the Atmosphere (Griess-Saltzman Reaction)
ASTM D1607-91(2018)e1 Standard Test Method for Nitrogen Dioxide Content of the Atmosphere (Griess-Saltzman Reaction)
ASTM UOP971-00 Trace Nitrogen in Light Aromatic Hydrocarbons by Chemiluminescence
ASTM D7649-10 Standard Test Method for Determination of Trace Carbon Dioxide, Argon, Nitrogen, Oxygen and Water in Hydrogen Fuel by Jet Pulse Injection and Gas Chromatography/Mass Spectrometer Analysis
ASTM D3454-97 Standard Test Method for Radium-226 in Water
ASTM D3731-87(2004) Standard Practices for Measurement of Chlorophyll Content of Algae in Surface Waters
ASTM D2868-10(2015) Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White

Shandong Provincial Standard of the People's Republic of China, Nitrogen content in water quality

DB37/T 2735-2015 Determination of ammonium sulfate content in dry powder fire extinguishing agent Total nitrogen content method

Professional Standard - Petrochemical Industry, Nitrogen content in water quality

SH/T 0413-1992 Determination of Trace Basic Nitrogen Content in Liquid Paraffin
SH/T 0246-1992 Determination of Water Content in Light Petroleum Products (Electrometry)
SH/T 0224-1992 Determination of Nitrogen Content in Petroleum Additives (Kirsch method)

TH-TISI, Nitrogen content in water quality

TIS 2255.1-2005 Animal feeding stuff s-determination of nitrogen content and calculation of crude protein content.part 1: kjeldahl method

Professional Standard - Light Industry, Nitrogen content in water quality

QB/T 3812.17-1999 Leather.Determination of nitrogen content and “hide substance”.Titrimtric method
QB/T 2722-2005 Leather-Chemical tests-Determination of nitrogen content and "hide substance"-Titrimetric 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, Nitrogen content in water quality

GB/T 34532-2017 Coking wastewater—Determination of ammonia nitrogen content—Formaldehyde method

HU-MSZT, Nitrogen content in water quality

BELST, Nitrogen content in water quality

STB 17.13.05-49-2021 Еnvironmental pгоtесtion аnd nature use. Sampling and measurements, monitoring. Water quality. Determination of the mass concentration of nitrogen-containing substances using photometric tests

Professional Standard - Environmental Protection, Nitrogen content in water quality

HJ 537-2009 Water quality.Determination of ammonia nitrogen.Distillation-neutralization titration

GOSTR, Nitrogen content in water quality

GOST 34454-2018 Dairy products. Determination of protein content by the Kjeldahl method

YU-JUS, Nitrogen content in water quality

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.G8.467-1991 Reagents.Nickel(II) sulphate x-hydrate.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 E.L8.005-1980 Method of determination ofwather content in caces
JUS H.G8.158-1984 Reagents. Sodium carbonate anhydrous and sodium carbonate decahydrate. Determination of total ni-trogen contont. Colorimetric method

Group Standards of the People's Republic of China, Nitrogen content in water quality

T/GDASE 0009-2020 Determination of the content of carbon, hydrogen, oxygen, nitrogen and sulfur in graphene
T/GXAS 477-2023 Determination of total nitrogen content in sugarcane juice —sulphuric acid titrimetric method
T/SDAQI 064-2021 Determination of urea content in diesel engines NOx reduction agent - Aqueous urea solution by refractive index
T/NXCL 023-2023 Determination of hydrogen and nitrogen in Beryllium— Inert gas fusion infrared absorption/ thermal conductivity method

Professional Standard-Ships, Nitrogen content in water quality

CB 3328.5-1988 Inspection method for water quality of discharge water from ship sewage treatment——Examination method for oil content in water
CB* 3328.5-1988 Method for inspecting quality of water discharged from treatment of vessel sewage. Method of test for oil content in water
CB/T 3328.5-2013 Test method for waste water quality of ship sewage treatment.Part5: Oil content in water

BR-ABNT, Nitrogen content in water quality

ABNT MB-1133-1979

工业和信息化部/国家能源局, Nitrogen content in water quality

JB/T 13306-2017 Method for detecting impurity content in superabrasive cubic boron nitride

国家质量监督检验检疫总局, Nitrogen content in water quality

SN/T 4764-2017 Elemental analyzer method for determination of carbon, hydrogen, nitrogen and sulfur content in coal

Taiwan Provincial Standard of the People's Republic of China, Nitrogen content in water quality

CNS 5464-2007 Methods of test for copper in water
CNS 10990-1998 Method of test for lightweight particles in aggregate

CU-NC, Nitrogen content in water quality

NC 24-65-1986 Inorganic Chemical Products Nitrogen. Determination of Water Vapor Content. Aerial Water Point Method

Universal Oil Products Company (UOP), Nitrogen content in water quality

UOP 971-2000 TRACE NITROGEN IN LIGHT AROMATIC HYDROCARBONS BY CHEMILUMINESCENCE

Anhui Provincial Standard of the People's Republic of China, Nitrogen content in water quality

DB34/T 3690-2020 Determination of carbon dioxide and nitrogen content in liquefied petroleum gas
DB3418/T 005-2019 Determination of moisture content in ink sticks

Henan Provincial Standard of the People's Republic of China, Nitrogen content in water quality

DB41/T 1704-2018 Determination of total nitrogen content in compound fertilizers Dumas combustion method

国家能源局, Nitrogen content in water quality

NB/SH/T 0980-2019 Determination of basic nitrogen content in petroleum fractions by potentiometric titration method
NB/SH/T 0994-2019 Separation and Determination of Oxygen- and Nitrogen-Containing Additives in Gasoline Solid-Phase Extraction/Gas Chromatography-Mass Spectrometry

Military Standard of the People's Republic of China-General Armament Department, Nitrogen content in water quality

GJB 212.16-1986 Special industrial leather - Determination of nitrogen content and "skin" - Titration method

KR-KS, Nitrogen content in water quality

KS F ISO 16979-2020 Wood-based panels — Determination of moisture content

Professional Standard - Energy, Nitrogen content in water quality

NB/SH/T 0162-2021 Color indicator method for determination of basic nitrogen content in petroleum distillates

KE-KEBS, Nitrogen content in water quality

KS 08-264-1981 KENYA STANDARD METHODS FOR ESTIMATION OF MOISTURE. TOTAL SIZE OR FINISH, ASH. FATTY MATTER AND DETERMINATION OF WATER-SOLUBLE MATTER IN TEXTILES

Professional Standard - Petroleum, Nitrogen content in water quality

SY/T 7550-2000 Determination of wax,resins and asphaltenes contents in crude oil
SY/T 7550-2012 Determination of wax, resins and asphaltenes in crude oil
SY 7550-2012 Determination of Wax, Colloid and Asphaltene Content in Crude Oil
SY/T 7550-2004 Determination method of wax, colloid and asphaltenes in crude oil

国家石油和化学工业局, Nitrogen content in water quality

SY/T 7550-1999 Determination of wax, gum and asphaltene content in crude oil

Professional Standard - Aviation, Nitrogen content in water quality

HB 5297.17-1984 Determination of Nitrogen in Titanium and Titanium Alloys by Steam Distillation
HB 5297.25-2001 Methods of chemical analysis of titanium alloys - Determination of nitrogen content by steam distillation

Professional Standard - Electron, Nitrogen content in water quality

SJ/T 11493-2015 Test method for measuring nitrogen concentration in silicon substrates by secondary ion mass spectrometry

Guangxi Provincial Standard of the People's Republic of China, Nitrogen content in water quality

DB45/T 1545-2017 Rapid determination of cadmium, lead, copper and arsenic in water quality by anodic stripping voltammetry

农业农村部, Nitrogen content in water quality

NY/T 3290-2018 Determination of phenolic acid content in fruits, vegetables and their products using liquid mass spectrometry

Jilin Provincial Standard of the People's Republic of China, Nitrogen content in water quality

DB22/T 3427-2023 Volumetric and spectrophotometric methods for the determination of cyanide in thiocyanate-containing wastewater
DB22/T 2564-2016 Determination of seven kinds of organic pollutants in drinking water and source water by liquid chromatography-mass spectrometry

Heilongjiang Provincial Standard of the People's Republic of China, Nitrogen content in water quality

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

TR-TSE, Nitrogen content in water quality

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

Hunan Provincial Standard of the People's Republic of China, Nitrogen content in water quality

DB43/T 2196-2021 Determination of Methcathinone Content in Water Environment by Liquid Chromatography-Tandem Mass Spectrometry