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Determination method of nitrate nitrogen content

Determination method of nitrate nitrogen content, Total:336 items.

In the international standard classification, Determination method of nitrate nitrogen content involves: Fertilizers, Inorganic chemicals, Farming and forestry, Water quality, Soil quality. Pedology, Coals, External water conveyance systems, Analytical chemistry, Non-ferrous metals, Ferrous metals, Photography, Wastes, Milk and milk products, Air quality, Products of the chemical industry, Environmental testing, Biology. Botany. Zoology, Fuels, Leather technology, Cereals, pulses and derived products, Ferroalloys, Tobacco, tobacco products and related equipment, Meat, meat products and other animal produce, Animal feeding stuffs, Pulps, Beverages, Fruits. Vegetables, General methods of tests and analysis for food products, Rubber, Construction materials, Rubber and plastics products, Organic chemicals, Petroleum products in general, Iron and steel products, Metalliferous minerals, Prepackaged and prepared foods.


Korean Agency for Technology and Standards (KATS), Determination method of nitrate nitrogen content

  • KS M ISO 4176-2006(2011) Fertilizers-Determination of nitrate nitrogen content-Nitron gravimetric method
  • KS M ISO 4176-2012 Fertilizers-Determination of nitrate nitrogen content-Nitron gravimetric method
  • KS M ISO 4176:2012 Fertilizers-Determination of nitrate nitrogen content-Nitron gravimetric method
  • KS M ISO 5313:2007 High nitrogen content, straight ammonium nitrate fertilizers-Determination of oil retention
  • KS M ISO 5313:2013 High nitrogen content, straight ammonium nitrate fertilizers-Determination of oil retention
  • KS M ISO 5314-2007(2012) Fertilizers-Determination of ammoniacal nitrogen content-Titrimetric method after distillation
  • KS M ISO 5314-2013 Fertilizers-Determination of ammoniacal nitrogen content-Titrimetric method after distillation
  • 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 D 1811-2003 Methods for determination of nitrogen in iron and steel
  • KS M ISO 6851:2002 Photography-Processing waste-Determination of total amino nitrogen-Microdiffusion Kjeldahl method
  • KS M ISO 3332-2017(2022) Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
  • KS M ISO 5397:2002 Leather-Determination of nitrogen content and “hide substance”-Titrimetric method
  • KS D ISO 4945:2002 Steel-Determination of nitrogen content-Spectrophotometric method
  • KS H ISO 1871-2013(2018) Agricultural food products ― General directions for the determination of nitrogen by the Kjeldahl method
  • KS M ISO 5478:2010 Rubber-Determination of styrene content-Nitration method
  • KS M ISO 5478-2021 Rubber-Determination of styrene content-Nitration method
  • KS D ISO 10702:2002 Steel and iron-Determination of nitrogen content-Titrimetric method after distillation
  • KS M ISO 5315-2007(2012) Fertilizers-Determination of total nitrogen content-Titrimetric method after distillation
  • KS M 2112-2011 Crude petroleum and petroleum products-Determination of nitrogen content
  • KS D ISO 4945-2002(2017) Steel-Determination of nitrogen content-Spectrophotometric method
  • KS D 1910-6-2023 Method for chemical analysis of ferrochromium — Part 6: Determination of nitrogen content
  • KS M ISO 5478-2010(2015) Rubber-Determination of styrene content-Nitration method
  • KS M ISO 5315:2007 Fertilizers-Determination of total nitrogen content-Titrimetric method after distillation
  • KS M ISO 5315:2013 Fertilizers-Determination of total nitrogen content-Titrimetric method after distillation
  • KS M 1922-2002(2007) Urea for industrial use-Determination of nitrogen content-Titrimetric method after distillation
  • KS M ISO 5397-2022 Leather-Determination of nitrogen content and “hide substance”-Titrimetric method

Professional Standard - Agriculture, Determination method of nitrate nitrogen content

  • NY/T 1116-2014 Fertilizers.Determination of nitrate nitrogen, ammonium nitrogen, amide nitrogen contents
  • GB 3597-1983 Determination of nitrate nitrogen content in fertilizers Nitrogen reagent gravimetric method
  • 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
  • GB 3595-1983 Determination of ammonia nitrogen content in fertilizers Titration method after distillation
  • GB 3598-1983 Determination of Urea Nitrogen Content in Fertilizers Urease Method

International Organization for Standardization (ISO), Determination method of nitrate nitrogen content

  • ISO 4176:1981 Fertilizers; Determination of nitrate nitrogen content; Nitron gravimetric method
  • ISO 2991:1974 Nitric acid for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
  • ISO 3330:1975 Ammonium nitrate for industrial use; Determination of ammoniacal nitrogen content; Titrimetric method after distillation
  • ISO 3331:1975 Ammonium nitrate for industrial use — Determination of total nitrogen content — Titrimetric method after distillation
  • ISO 3332:1975 Ammonium sulphate for industrial use; Determination of ammoniacal nitrogen content; Titrimetric method after distillation
  • ISO 8968-1:2001 Lait - Détermination de la teneur en azote - Partie 1: Méthode Kjeldahl (Deuxième édition)
  • ISO 8968-1:2001|IDF 20-1:2001 Determination of milk nitrogen content Part 1: Kjeldahl method
  • ISO 5397:1984 Leather; Determination of nitrogen content and "hide substance"; Titrimetric method
  • ISO/FDIS 937 Meat and meat products — Determination of nitrogen content — Reference method
  • ISO/DIS 937 Meat and meat products — Determination of nitrogen content — Reference method
  • ISO 937:2023 Meat and meat products — Determination of nitrogen content — Reference method
  • ISO 8968-1:2001 | IDF 20-1: 2001 Milk — Determination of nitrogen content — Part 1: Kjeldahl method
  • ISO 22863-10:2021 Fireworks - Test methods for determination of specific chemical substances - Part 10: Nitrogen content in nitrocellulose by iron(II) sulfate titration
  • ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
  • ISO 4945:1977 Steel; Determination of nitrogen content; Spectrophotometric method
  • ISO 5314:1981 Fertilizers; Determination of ammoniacal nitrogen content; Titrimetric method after distillation
  • ISO 6851:2001 Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)
  • ISO 5478:1980 Rubber — Determination of styrene content — Nitration method
  • ISO 5478:2006 Rubber - Determination of styrene content - Nitration method
  • ISO 5478:1990 Rubber; determination of styrene content; nitration method
  • ISO 2515:1973 Ammonium hydrogen carbonate for industrial use (including foodstuffs); Determination of ammoniacal nitrogen content; Volumetric method after distillation
  • ISO 2899:1974 Sulphuric acid and oleums for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
  • ISO 5397:1984 | IULTCS/IUC 10 Leather — Determination of nitrogen content and "hide substance" — Titrimetric method
  • ISO 10702:1993 Steel and iron; determination of nitrogen content; titrimetric method after distillation
  • ISO 5315:1984 Fertilizers; Determination of total nitrogen content; Titrimetric method after distillation

British Standards Institution (BSI), Determination method of nitrate nitrogen content

  • BS EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
  • BS 4267-2:1988(1999) Ammonium nitrate — Part 2 : Method for determination of total nitrogen content
  • BS 4267-1:1988(1999) Ammonium nitrate — Part 1 : Method for determination of ammoniacal nitrogen content
  • BS DD CEN/TS 15604:2007 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
  • BS EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
  • DD CEN/TS 15604:2007 Fertilizers — Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
  • BS DD CEN/TS 15750:2009 Fertilizers - Determination of different forms of nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
  • BS 5551-4.1.1:1981 Fertilizers - Chemical analysis - Determination of nitrogen - Nitron gravimetric method for determination of nitrate nitrogen
  • BS EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
  • 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 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 ISO 22863-10:2021 Fireworks. Test methods for determination of specific chemical substances. Nitrogen content in nitrocellulose by iron(II) sulfate titration
  • BS 4267-7:1987(1999) Ammonium nitrate — Part 7 : Methods for determination of nitrite content
  • BS ISO 6853:2002 Photography - Processing waste - Determination of ammoniacal nitrogen (microdiffusion method)
  • BS 5551-4.1.3:1986 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of total nitrogen content (titrimetric method after distillation)
  • PD CEN/TS 17762:2022 Inorganic fertilizers. Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content
  • 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 4267-6:1987(1999) Ammonium nitrate — Part 6 : Method for determination of water content
  • BS ISO 17997-2:2005 Milk - Determination of casein-nitrogen content - Direct 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
  • PD CEN/TS 17761:2022 Inorganic fertilizers. Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content
  • BS ISO 937:2023 Meat and meat products. Determination of nitrogen content. Reference method
  • 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 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 4267-8:1987(1999) Ammonium nitrate — Part 8 : Methods for determination of chloride content
  • BS 4267-9:1987(1999) Ammonium nitrate — Part 9 : Method for determination of sulphate 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 ISO 6851:2002 Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)
  • BS ISO 17997-1:2005 Milk - Determination of casein-nitrogen content - Indirect method (Reference method)
  • BS EN 12014-2:1997 Foodstuffs - Determination of nitrate and/or nitrite content - HPLC/IC method for the determination of nitrate content of vegetables and vegetable products
  • BS EN ISO 5983-1:2005(2009) Animal feeding stuffs — Determination of nitrogen content and calculation of crude protein content — Part 1 : Kjeldahl method

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Determination method of nitrate nitrogen content

  • GB/T 3597-2002 Fertilizer--Determination of nitrate nitrogen content--Nitron gravimetric method
  • GB/T 42487-2023 Soil quality Determination of soil nitrate nitrogen, nitrite nitrogen and ammonium nitrogen potassium chloride solution leaching flow analysis method
  • GB/T 42485-2023 Soil quality Determination of soil nitrate nitrogen, nitrite nitrogen and ammonium nitrogen
  • GB/T 10511-2008 Determination of tatal nitrogen content for nitrophosphate.Titrimetric method after distillation
  • GB/T 3600-2000 Fertilizers-Determination of ammoniacal nitrogen content-Formaldehyde method
  • GB/T 32737-2016 Determination of nitrate nitrogen in soil - Ultraviolet spectrophotometry method
  • GB/T 2441.1-2001 Determination of urea-Determination of total nitrogen content
  • GB/T 3595-2000 Fertilizers-Determination of ammoniacal nitrogen content-Titrimetric method after distillation
  • GB/T 41965-2022 Photography—Processing waste—Determination of total amino nitrogen(microdiffusion Kjeldahl method)
  • GB/T 41964-2022 Photography—Processing waste—Determination of ammoniacal nitrogen (microdiffusion method)
  • GB/T 13598-1992 A method for the determination of agricultural chemical residues containing nitrogenous in tobacco leaves
  • GB/T 2441.1-2008 Determination of urea.Part 1:Total nitrogen content
  • 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

FI-SFS, Determination method of nitrate nitrogen content

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

German Institute for Standardization, Determination method of nitrate nitrogen content

  • 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 CEN/TS 15604:2008 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen; German version CEN/TS 15604:2007
  • DIN CEN/TS 15559:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd; German version CEN/TS 15559:2007
  • DIN EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda; English version of DIN EN 15476:2009-04
  • DIN EN 15604:2009-06 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen; German version EN 15604:2009 / Note: To be replaced by DIN EN ISO 15604 (2019-06).
  • DIN CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German version CEN/TS 15561:2007
  • 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 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 51722-1:1990-07 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
  • DIN CEN/TS 17759:2022-07 Inorganic fertilizers - Determination of pH of a solution of ammonium nitrate fertilizers of high nitrogen content; German version CEN/TS 17759:2022
  • 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 12135:1997-12 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
  • DIN EN ISO 20483:2014-03 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013); German version EN ISO 20483:2013
  • DIN EN 12014-2:2018-02 Foodstuffs - Determination of nitrate and/or nitrite content - Part 2: HPLC/IC method for the determination of nitrate content of vegetables and vegetable products; German version EN 12014-2:2017
  • DIN EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977); German version EN ISO 4945:2009
  • DIN EN 12014-4:2005-08 Foodstuffs - Determination of nitrate and/or nitrite content - Part 4: Ion-exchange chromatographic (IC) method for the determination of nitrate and nitrite content of meat products; German version EN 12014-4:2005
  • DIN EN ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection (ISO 13395:1996); German version EN ISO 13395:1996
  • DIN EN 12014-2:2018 Foodstuffs - Determination of nitrate and/or nitrite content - Part 2: HPLC/IC method for the determination of nitrate content of vegetables and vegetable products
  • DIN EN 12014-5:1997-08 Foodstuffs - Determination of nitrate and/or nitrite content - Part 5: Enzymatic determination of nitrate content of vegetable-containing food for babies and infants; German version EN 12014-5:1997
  • DIN EN ISO 5983-1 Berichtigung 1:2009-07 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005); German version EN ISO 5983-1:2005, Corrigendum to DIN EN ISO 5983-1:2005-10; German version EN ISO 5983-1:20...
  • DIN EN ISO 5983-1:2005-10 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005); German version EN ISO 5983-1:2005
  • 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 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

European Committee for Standardization (CEN), Determination method of nitrate nitrogen content

  • 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 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
  • FprCEN/TS 17762-2021 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content
  • FprCEN/TS 17761-2021 Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content
  • EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
  • EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

RU-GOST R, Determination method of nitrate nitrogen content

  • 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 30181.4-1994 Mineral fertilizers. Method for determination of total mass fraction of nitrogen in compound fertilizers and nitrale fertilizers in ammonium and nitrate forms (Deward Method)
  • GOST 29302-1992 Ammonium nitrate for industrial use. Method for determination of total nitrogen content (titrimetric) after distillation
  • GOST 30181.3-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in fertilizers with nitrate nitrogen
  • GOST 29288-1992 Fertilizers with high content of nitrogen. Ammonium nitrate. Method for determination of the ability to suppress the lubricant
  • GOST EN 15561-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
  • GOST 20851.1-1975 Mineral fertilizers. Methods for determination of nitrogen content
  • GOST R 51460-1999 Cheese. Method for determination of nitrate and nitrite contents
  • GOST 27753.7-1988 Greenhouse grounds methods for determination of nitrate nitrogen
  • GOST 33813-2016 Ammonium nitrate and fertilizers on its base. Method for determination of copper content
  • GOST 26107-1984 Soils. Methods for determination of total nitrogen
  • GOST 14839.8-1969 Industrial explosives. Method for determination of calcium nitrate content
  • GOST 27894.4-1988 Peat and products of its processing for agriculture. Methods for determination of nitrate nitrogen
  • GOST EN 15560-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide nitrate free
  • GOST 30181.9-1994 Mineral fertilizers. Method for determination of total mass fraction of nitrogen in compound fertilizers (distillation method using the chromium reduction of nitrate nitrogen and mineralization of organic nitrogen)
  • 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 33045-2014 Water. Methods for determination of nitrogen-containing matters
  • GOST 10671.4-1974 Reagents. Methods for determination of nitrogen compaunds impurity general content
  • GOST 14839.9-1969 Industrial explosives. Method for determination of nitroamines (hexogen) content
  • GOST 32257-2013 Milk and milk products. Method for determination of nitrate and nitrite contents
  • GOST R 50453-1992 Meat and meat products. Determination of nitrogen content (Reference method)
  • GOST R 54234-2010 Solid recovered fuels. Determination of carbon, hydrogen and nitrogen content by instrument methods
  • GOST EN 12014-2-2014 Foodstuffs. Determination of nitrate and/or nitrite content. Part 2. HPLC/IC method for the determination of nitrate content of vegetables and vegetable products
  • GOST 29304-1992 Ammonium nitrate for industrial use. Method for determination of ammoniacal nitrogen content (titrimetric) after distillation
  • 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

Association Francaise de Normalisation, Determination method of nitrate nitrogen content

  • NF U42-141:1984 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric 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 U42-149*NF EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
  • NF T20-286:1982 Nitric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method.
  • NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
  • XP U42-794*XP CEN/TS 17762:2022 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content
  • 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
  • NF V03-750:1999 Cereals and pulses. Determination of the nitrogen content and calculation of the raw protein content. Kjeldahl method.
  • 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 X31-111*NF ISO 11261:1995 Soil quality. Determination of total nitrogen. Modified kjeldahl method.
  • NF EN ISO 20483:2014 Céréales et légumineuses - Détermination de la teneur en azote et calcul de la teneur en protéines brutes - Méthode de Kjeldahl
  • NF S57-037-10*NF ISO 22863-10:2021 Fireworks - Test methods for determination of specific chemical substances -Part 10 : nitrogen content in nitrocellulose by iron(II) sulfate titration
  • NF EN 15750:2010 Engrais - Détermination de la teneur en azote total des engrais ne contenant l'azote que sous forme nitrique, ammoniacale et uréique, selon deux méthodes différentes
  • NF EN 12014-2:2017 Produits alimentaires - Détermination de la teneur en nitrates et/ou en nitrites - Partie 2 : méthode de détermination par CLHP/CI de la teneur en nitrates des légumes et des produits à base de légumes
  • 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 U42-151:1984 Fertilizers. Determination of total nitrogen content. Titrimetric method after distillation.
  • NF V03-750:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method.
  • NF V03-010-5*NF EN 12014-5:1997 Foodstuffs. Determination of nitrate and/or nitrite content. Part 5 : enzymatic determination of nitrate content of vegetable containing food for babies and infants.
  • NF EN ISO 5983-1:2005 Aliments des animaux - Détermination de la teneur en azote et calcul de la teneur en protéines brutes - Partie 1 : méthode Kjeldahl
  • NF ISO 22863-10:2021 Artifices de divertissement - Méthodes d'essai pour la détermination de substances chimiques spécifiques - Partie 10 : taux d'azote dans la nitrocellulose par titration de l'ion sulfate de fer (II)
  • NF V04-291:1989 WHEY CHEESE. DETERMINATION OF NITRATE AND NITRITE CONTENTS. METHOD BY CADMIUM REDUCTION AND SPECTROMETRY.
  • NF A06-324*NF ISO 10702:1996 Steel and iron. Determination of nitrogen content. Titrimetric method after distillation.

Military Standard of the People's Republic of China-General Armament Department, Determination method of nitrate nitrogen content

  • GJB 337-1987 Determination method of nitrogen content of nitrocellulose (interferometer method)
  • GJB 337-1987(XG1-2015) Modification sheet 1-2015 for determination method of nitrogen content of nitrocellulose
  • GJB 770.303-1989 Test methods for gunpowder analysis: Determination of nitrogen content of nitrocellulose. Five-tube nitrogen meter method
  • GJB 8682.11-2015 Methods of chemical analysis of pyrotechnics Part 11: Determination of barium nitrate content and nitrogen determination method
  • GJB 770.308-1990 Test methods for gunpowder analysis Determination of nitrogen content of nitrocellulose Ferrous iron-titanium chloride method
  • GJB 770.309-1991 Test methods for gunpowder analysis - Determination of nitroglycerin content - Gas measurement method
  • GJB 1047.1A-2020 Test methods for black powder Part 1: Determination of potassium nitrate content Weighing method

RO-ASRO, Determination method of nitrate nitrogen content

  • SR ISO 4176:1981 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method
  • STAS 7425-1979 NITROCELLULOSES Determination of nitrogen content
  • SR ISO 5314:1981 Fertilizers. Determination of ammoniaca! nitrogen content Titrimetric method after distillation
  • SR ISO 5313:1986 High nitrogen content, straight ammonium nitrate fertilizers. Determination of oil retention
  • SR ISO 5315:1984 Fertilizers. Determination of totai nitrogen content.Titrimetric method after distilation

TR-TSE, Determination method of nitrate nitrogen content

  • TS 2466-1976 Nitric Acit For Industrial Use Determination of Ammoniacal Nitrogen Content Spectrophotoraetric Method
  • TS 2428-1976 METHODS FOR THE CHEMICAL ANALYSIS OF IRON AND STEELS DETERMINATION OF NITROGEN CONTENT
  • TS 3308-1979 METHODS FOR THE ANALYSIS OF WATER DETERMINATION OF THE NITRATE CONTENT

BE-NBN, Determination method of nitrate nitrogen content

  • NBN T 03-069-1979 Ammonium sulphate for industrial use - Determination of ammoniacal nitrogen content - Titrimetric method after distillation
  • NBN T 03-041-1979 Nitric acid for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
  • NBN T 03-056-1979 Ammonium nitrate for industrial use - Determination of total nitrogen content - Titrimetric method after distillation
  • NBN T 91-256-1977 Water analysis methods - Determination of the nitrate nitrogen -Photometric method with chromotropic acid
  • NBN T 04-301-1983 Urea for industrial use - Determination of nitrogen content - Titrimetric raethod after distillation
  • NBN V 21-003-1987 Milk - Determination of nitrogen content - Kjeldahl method
  • NBN V 21-027-1982 Cheese - Determination of nitrate and nitrite contents - Reference method
  • NBN T 04-304-1983 Urea for indus trial use - Determination of iron content-2,2'-Bipyridyl photometric method
  • NBN T 03-081-1979 Ammonium hydrogen carbonate for industrial use (including food-stuffs) - Determination of ammoniacal nitrogen content - Titrimetric method after distillation
  • 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

Tianjin Provincial Standard of the People's Republic of China, Determination method of nitrate nitrogen content

YU-JUS, Determination method of nitrate nitrogen content

  • JUS H.B8.286-1983 Fertilizers. Determination of content nitrat-nitrogen. Volumetric method
  • JUS H.Z1.137-1985 Testing of industrial vvaters. Determination of nitrite-nitrate and the combined nitrite-nitrate nitrogen, Spectrophotometric method
  • JUS H.B8.815-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of copper content - Atomic absorption spectrophotometric method
  • JUS H.B8.637-1981 Sulphuric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method
  • JUS H.G8.044-1982 Reaaents. Si Iver nitrate. Determination ofsulphates content. Turbidimetric method
  • JUS H.B8.817-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of the particle size (granulometry)
  • JUS H.F8.132-1986 Gases. Determination of nitrogen content. Gas chromatographic method
  • JUS H.B8.285-1983 Fertilizers. Determination of content amoniac-nitrogen. Volumetric method
  • JUS B.H8.320-1988 Methods of analysis of coal and coke. Determination of nitrogen ccmtent - Makro Kjeldahl nethod

PH-BPS, Determination method of nitrate nitrogen content

  • PTS 83-1970 Method of Test for the Determination of Nitrogen Content of Nitrate-Free Fertilizers
  • PTS 86-1970 Method of Test for the Determination of Armoniacal Nitrogen

Xinjiang Provincial Standard of the People's Republic of China, Determination method of nitrate nitrogen content

Shandong Provincial Standard of the People's Republic of China, Determination method of nitrate nitrogen content

Jilin Provincial Standard of the People's Republic of China, Determination method of nitrate nitrogen content

  • DB22/T 2270-2018 Determination of Ammonium Nitrogen and Nitrate Nitrogen in Farmland Soil by Flow Injection Analysis
  • DB22/T 2270-2015 Determination of Ammonium Nitrogen and Nitrate Nitrogen in Farmland Soil by Flow Injection Analysis
  • DB22/T 1932-2013 Determination method of total nitrogen content in peat (Kjeldahl method)

GOSTR, Determination method of nitrate nitrogen content

  • GOST R ISO 15604-2019 Fertilizers. Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen

Military Standard of the People's Republic of China-Commission of Science,Technology and Industry for National Defence, Determination method of nitrate nitrogen content

  • GJB 5381.11-2005 Methods of chemical analysis for pyrotech. Part 11: Determination of barium nitrate content. Azotometry method

NL-NEN, Determination method of nitrate 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 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 6440-1981 Water - Photometric determination of nitrate content
  • NEN 2866-1989 Fruit juices Determination of nitrate content - Spectrometric method
  • NEN 6641-1983 Sludge - Determination of the sum of ammoniacal and organically bound nitrogen according to Kjeldahl after mineralization with selenium
  • NEN 6622-1988 Sludge - Determination of sand and other acidinsoluble material, and the fraction with a partiele size greater than 0,1 mm - Gravimetric method
  • NEN 3760-1984 Cheese - Determination of the nitrogen content according to Kjeldahl - Calculation of the crude protein content

Indonesia Standards, Determination method of nitrate nitrogen content

  • SNI 4146-2013 Method for determination of total nitrogen content in sediment by Kjeldahl titration method
  • SNI 19-6964.7-2003 Seawater quality - Part 7: Test methods of nitrates (NO3-N) with cadmium reduction by spectrophotometry

Japanese Industrial Standards Committee (JISC), Determination method of nitrate nitrogen content

  • 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 G 1228 AMD 1:2006 Iron and steel -- Methods for determination of nitrogen content (Amendment 1)
  • JIS K 0104:2011 Methods for determination of nitrogen oxides in flue gas
  • JIS K 0170-2:2011 Testing methods for water quality by flow analysis -- Part 2: Nitrite nitrogen and nitrate nitrogen
  • JIS K 0170-2:2019 Testing methods for water quality by flow analysis -- Part 2: Nitrite nitrogen and nitrate nitrogen

ES-UNE, Determination method of nitrate nitrogen content

  • 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.)
  • UNE-CEN/TS 17760:2022 Inorganic fertilizers - Determination of particle size of ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
  • UNE-CEN/TS 17751:2022 Inorganic fertilizers - Determination of specific parameters in ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
  • UNE-CEN/TS 17759:2022 Inorganic fertilizers - Determination of pH of a solution of ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
  • UNE-EN 12014-2:2018 Foodstuffs - Determination of nitrate and/or nitrite content - Part 2: HPLC/IC method for the determination of nitrate content of vegetables and vegetable products
  • UNE-EN ISO 5983-1:2007/AC:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005/Cor 1:2008)
  • 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)

Danish Standards Foundation, Determination method of nitrate nitrogen content

  • DS/EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
  • DS/EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method
  • DS/EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
  • DS/ISO 22863-10:2021 Fireworks – Test methods for determination of specific chemical substances – Part 10: Nitrogen content in nitrocellulose by iron(II) sulfate titration
  • DS/EN ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
  • DS/EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
  • DS/EN 12014-2:1998 Foodstuffs - Determination of nitrate and/or nitrite content - Part 2:HPLC/IC method for the determination of nitrate content of vegetables and vegetable products
  • DS/EN 12014-5:1998 Foodstuffs - Determination of nitrate and/or nitrite content - Part 5: Enzymatic determination of nitrate content of vegetable-containing food for babies and infants
  • DS/EN ISO 5983-1/AC:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method
  • DS/EN ISO 5983-1:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method

Lithuanian Standards Office , Determination method of nitrate nitrogen content

  • LST EN 15750-2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
  • LST EN 12135-2001 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
  • LST EN 12014-2-2001 Foodstuffs - Determination of nitrate and/or nitrite content - Part 2: HPLC/IC method for the determination of nitrate content of vegetables and vegetable products
  • LST EN 12014-5-2001 Foodstuffs - Determination of nitrate and/or nitrite content - Part 5: Enzymatic determination of nitrate content of vegetable-containing food for babies and infants
  • LST EN ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2006)

AENOR, Determination method of nitrate nitrogen content

  • UNE-EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
  • UNE-EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
  • UNE-EN 12014-2:1998 Foodstuffs - Determination of nitrate and/or nitrite content - Part 2: HPLC/IC method for the determination of nitrate content of vegetables and vegetable products
  • UNE-EN 12014-5:1997 FOODSTUFFS. DETERMINATION OF NITRATE AND/OR NITRITE CONTENT. PART 5: ENZYMATIC DETERMINATION OF NITRATE CONTENT OF VEGETABLE-CONTAINING FOOD FOR BABIES AND INFANTS.
  • UNE-EN ISO 20483:2014 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013)

Professional Standard - Military and Civilian Products, Determination method of nitrate nitrogen content

  • WJ 2128-1993 Method for Determination of Nitrogen Content in Primer

VN-TCVN, Determination method of nitrate nitrogen content

  • TCVN 3706-1990 Aquatic products.Method for the determination of nitrogen ammonia 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 3707-1990 Aquatic products.Method for the determination of amine ammonia nitrogen content
  • TCVN 305-2010 Steel and iron.Determination of nitrongen content.Methods of chemical analysis.
  • TCVN 3708-1990 Aquatic products.Method for the determination of nitrogen amino acid content
  • TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content

American Society for Testing and Materials (ASTM), Determination method of nitrate nitrogen content

  • ASTM E1584-23 Standard Test Method for Assay of Nitric Acid
  • ASTM D4795-94(1998) Standard Test Method for Nitrogen Content of Soluble Nitrocellulose-Alternative Method
  • ASTM D4795-94(2003) Standard Test Method for Nitrogen Content of Soluble Nitrocellulose8212;Alternative Method
  • ASTM D4795-94(2008) Standard Test Method for Nitrogen Content of Soluble Nitrocellulosex2014;Alternative Method
  • ASTM E258-67(2002) Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method
  • ASTM D2868-17 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White

CZ-CSN, Determination method of nitrate nitrogen content

  • CSN 65 4836-1983 Minerál fertilizers Methode for determination of total nitrogen content
  • CSN 66 8027-1957 Smokeless powders, chemical tests, determination of nitrogen content of nitrocellulose dust
  • CSN 56 0020-1987 General directions for the determination f nitrogen by the Kjeldahl method
  • CSN 70 4243-1981 Glass apparatus by Parnas-Wagner for the determination of nitrogen
  • CSN ISO 1871:1994 Agricultural food products-General directions for the determination of nitrogen by the Kjeldahl method
  • CSN 57 0158-1986 Testing methods for meat products and canned sterilized food. Determination of nitrite and nitrate content
  • CSN 46 7092-64-1998 Testing methods for feeding stuffs - Part 64: Determination of dimetridazol content

PT-IPQ, Determination method of nitrate nitrogen content

  • NP 1273-1976 Nitric acid used in industry. Measurement of nitrogen content by photometry
  • NP EN 12135-2000 Fruit and vegetable juices Determination of nitrogen content Kjeldahl method

未注明发布机构, Determination method of nitrate nitrogen content

  • DIN CEN/TS 17762:2022 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content
  • ASTM RR-D31-1008 1996 D2868-Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
  • DIN CEN/TS 17759:2022 Inorganic fertilizers - Determination of pH of a solution of ammonium nitrate fertilizers of high nitrogen content
  • DIN CEN/TS 17761:2022 Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content
  • ASTM RR-D31-1014 2010 D2868-Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
  • DIN EN ISO 20483 E:2012-07 Determination of nitrogen content and calculation of crude protein content in cereals and legumes Kjeldahl method (draft)
  • DIN EN 12014-2 E:2016-08 Foodstuffs - Determination of nitrate and/or nitrite content - Part 2: HPLC/IC method for the determination of nitrate content of vegetables and vegetable products

TH-TISI, Determination method of nitrate nitrogen content

  • TIS 1771-1999 Ammonium sulphate for industrial use.determination of ammoniacal nitrogen content.titrimetric method after distillation

Group Standards of the People's Republic of China, Determination method of nitrate nitrogen content

  • T/ZFL 022-2023 Detection method of nitrate nitrogen and ammonium nitrogen uptake in root hair cells of Arabidopsis thaliana based on non-invasive micro-measurement technology
  • T/ZFL 022-2022 Detection method of nitrate nitrogen and ammonium nitrogen uptake in root hair cells of Arabidopsis thaliana based on non-invasive micro-measurement technology
  • T/CMES 01011-2023 Determination method for content of nitrogen, sulfur and phosphorus in recycled sand for foundry

工业和信息化部, Determination method of nitrate nitrogen content

  • YB/T 4582.7-2017 Determination of total nitrogen content of ferrous silicon nitride by neutralization titration method
  • YB/T 4582.1-2017 Determination of calcium iron silicon nitride content EDTA titration method
  • YB/T 4582.5-2017 Determination of ferrosilicon aluminum nitride content EDTA titration method
  • YB/T 4726.2-2018 Determination of chloride ion content in iron-containing dust sludge by silver nitrate titration method

AR-IRAM, Determination method of nitrate nitrogen content

Professional Standard - Commodity Inspection, Determination method of nitrate nitrogen content

  • SN/T 0736.5-1999 Chemical analysis of fertilizers for import and export.Determination of nitrogen content
  • SN/T 0541.5-2009 Inspecting method of import and export standard rubber.Determination of nitrogen content

Professional Standard - Aerospace, Determination method of nitrate nitrogen content

  • QJ 2781A-2004 Determination of the carbon content,the hydrogen content and the nitrogen contene of carbonaceous material
  • QJ 2781-1995 Method for Determination of Carbon, Hydrogen and Nitrogen Content in Carbon Materials

BG-BDS, Determination method of nitrate nitrogen content

  • BGC ISO 5983:2001 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Kjeldahl method

Professional Standard - Ferrous Metallurgy, Determination method of nitrate nitrogen content

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

国家市场监督管理总局、中国国家标准化管理委员会, Determination method of nitrate nitrogen content

  • GB/T 24583.3-2019 Vanadium-nitrogen—Determination of nitrogen content—Distillation-neutralization titration method

International Dairy Federation (IDF), Determination method of nitrate nitrogen content

  • IDF 20-1-2001 Milk - Determination of nitrogen content - Part 1: Kjeldahl method

ZA-SANS, Determination method of nitrate nitrogen content

  • SANS 970:2010 Leather - Determination of nitrogen content and "hide substance" - Titrimetric method

CU-NC, Determination method of nitrate nitrogen content

  • NC 24-64-1986 Inorganic Chemical Products Nitrogen, Determination of Oil Content

PL-PKN, Determination method of nitrate nitrogen content

  • PN Z04075-1961 Speedy Me?hod for De?er mina?ion of Ni?rogen Oxyde* in Air
  • PN A79528-17-1993 Spirit (ethyl alcohol). Methods of tests. Determination of voltile nitrogen basen content

CEN - European Committee for Standardization, Determination method of nitrate nitrogen content

  • EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
  • EN ISO 8968-4:2001 Milk - Determination of Nitrogen Content - Part 4: Determination of Non-Protein Nitrogen Content

IN-BIS, Determination method of nitrate nitrogen content

  • IS 9967-1981 Cadmium reduction photometry method for determination of nitrate and nitrite content in cheese

AT-ON, Determination method of nitrate nitrogen content

  • ONORM DIN 10338-1992 Determination of nitrate and nitrite contents of cheese - Method by cadmium reduction

Professional Standard - Light Industry, Determination method of nitrate nitrogen content

  • QB/T 3812.17-1999 Leather.Determination of nitrogen content and “hide substance”.Titrimtric 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, Determination method of nitrate nitrogen content

  • GB/T 6730.26-2017 Iron ores—Determination of fluorine content—Thorium nitrate titrimetric method

American National Standards Institute (ANSI), Determination method of nitrate nitrogen content

  • ANSI/PIMA IT4.47-1998 Photography (Processing) - Effluents - Determination of Total Amino Nitrogen - Microdiffusion Kjeldahl Method

Standard Association of Australia (SAA), Determination method of nitrate nitrogen content

  • AS 1050.12:1983 Methods for the analysis of iron and steel - Determination of nitrogen in steel (steam distillation titrimetric method)
  • 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)




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