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total nitrogen determination formic acid

total nitrogen determination formic acid, Total:499 items.

In the international standard classification, total nitrogen determination formic acid involves: Inorganic chemicals, Fertilizers, Farming and forestry, Water quality, Milk and milk products, Animal feeding stuffs, Coals, Food products in general, Soil quality. Pedology, Organic chemicals, Protection against fire, Fuels, External water conveyance systems, Analytical chemistry, Edible oils and fats. Oilseeds, Products of the chemical industry, Plastics, Wastes, Vocabularies, Ferrous metals, Rubber, General methods of tests and analysis for food products, Photography, Products of the textile industry, Ferroalloys, Environmental protection, Surface treatment and coating, Air quality, Test conditions and procedures in general, Raw materials for rubber and plastics, Beverages, Biology. Botany. Zoology, Lubricants, industrial oils and related products, Laboratory medicine.

Danish Standards Foundation, total nitrogen determination formic acid

DS 223:1991 Water analysis. Determination of the sum of nitrite- and nitrate-nitrogen
DS/EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
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 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
DS/EN ISO 13395:1997 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
DS/EN 15478:2009 Fertilizers - Determination of total nitrogen in urea
DS/EN ISO 8988:2007 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method
DS/EN 13342:2001 Characterisation of sludges - Determination of total Kjeldahl nitrogen
DS/EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
DS/EN 13716:2002 Surface active agents - Determination of total base nitrogen - Potentiometric titration
DS/CEN/TS 17403:2021 Fertilizers – Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with
DS/EN 26595:1993 Water quality. Determination of total arsenic. Silver diethyldithiocarbamate spectrophotometric method
DS/EN 14103:2011 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents
DS/EN 14104:2003 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of acid value
DS/EN 14104:2021 Fat and oil derivates – Fatty acid methyl ester (FAME) – Determination of acid value

NO-SN, total nitrogen determination formic acid

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

BE-NBN, total nitrogen determination formic acid

NBN T 04-002-1983 Fonnic acid for industrial use - Determination of total acidity-Titrimetric method
NBN T 03-056-1979 Ammonium nitrate for industrial use - Determination of total nitrogen content - Titrimetric method after distillation
NBN T 03-019-1979 Sulphuric acid and oleum for industrial use - Determination of total nitrogen content - Titrimetric method after distillation
NBN T 03-021-1979 Sulphuric acid and oleum for industrial use - Determination of oxides of nitrogen - 2,4-Xylenol spectrophotometric method
NBN T 03-270-1980 Phosphoric acid for industrial use (including foodstuffs)-Determi-nation of oxides of nitrogen content - 3,4-Xylenol spectrophotometric method
NBN T 04-284-1985 Cresylic acid for industrial use - Determination of m-cresol content
NBN T 03-036-1979 Nitric acid for inaustnal use - Determination or total acidity - Titrimetric method
NBN T 03-001-1979 Hydrochloric acid for industrial use - Determination of total acidity - Titrimetric method
NBN T 91-257-1977 Water analysis methods - Determination of the nitrite nitrogen - Photoraetric method
NBN T 04-283-1985 Cresylic acid and xylenols for industrial use- Determination of -cresol content
NBN T 04-282-1985 Cresylic acid and xylenols for industrial use- Measurement of colour
NBN T 03-313-1980 Condensed phosphates for industrial use (including foodstuffs) Determination of oxides of nitrogen content - 3,4-Xylenol spectrophotometric method
NBN 584-1961
NBN T 03-211-1980 Potassium sulphate for ?ndustrial use - Determination of acidity to methyl orange
NBN T 04-018-1985 Acetic acid for industrial use - Determination of formic acid content- Iodometric method
NBN T 03-055-1979 Ammonium nitrate for industrial use - Determination of ammoniacal nitrogen content - Titrimetric method after distillation
NBN T 04-003-1983 Formic acid for industrial use - Determination of content of other acids-Potentiometric method
NBN T 91-256-1977 Water analysis methods - Determination of the nitrate nitrogen -Photometric method with chromotropic acid
NBN T 04-040-1983 Formaldehyde solutions for industrial use - Determination of acidity

HU-MSZT, total nitrogen determination formic acid

YU-JUS, total nitrogen determination formic acid

JUS H.G8.457-1991 Reagents. Potassium sulpbate. Determination of total nltrogen content. Colorlmetrlc metho?
JUS H.G8.447-1990 Reagents. Zine sulphate heptahydrate. Determination of total nitrogen content. Colorimetric method
JUS H.G8.489-1991 Reagents. Potassium permanganate. 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.G8.064-1983 Reagents. Copper sulphate pentahydrate. Determination of total nitrogen content. Colorimetric method
JUS H.G8.280-1987 Reagents. lron(ll)sulphate heptahydrate. Determination of total nitrogen content. Colorimetric method
JUS H.B8.636-1981 Sulphuric acid for industrial u se. Determination of oxides of nitrogen. 2,4-xyleno/ spectrophotometric method
JUS H.G8.158-1984 Reagents. Sodium carbonate anhydrous and sodium carbonate decahydrate. Determination of total ni-trogen contont. Colorimetric method
JUS H.B8.288-1983 Fertilizers. Determination of content total-nitrogen. Volumetric method
JUS H.G8.499-1991 Reagents. Formic acid. Determination of formic acid content. 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.B8.416-1985 Phthalic anhydride for industrial use. Determination of maleic, citraconic, benzoicandO-toluicacid content. Gas chromatographic method
JUS H.G8.011-1980 Reagents. Hydrochloric acid. Determination of total acidity. Titrimetric method
JUS H.B8.421-1985 Maleic anhydride for industrial use. Determination of benzoic and O-toluic acid and citraconic and phthalic anhydride contents. Gas chromatographic method
JUS H.G8.083-1983 Reagents. Sodium chloride. Determination of total nitrogen content. Colorimetric method
JUS H.G8.435-1990 Reaqents. Potassium iodide. Determination of total nitroaen content. Colorimetric method
JUS H.G8.027-1981 Reagents. Sulphuric acid. Determination of total acidity. Titrimetric method
JUS H.G8.393-1989 Reagents. Nitric aci?. Determination of total acidity. Titrimetric raethod
JUS H.G8.055-1983 Reagents. Hydrogen peroxide. Determination of total nitrogen content. Colorimetric method
JUS H.G8.290-1987 Reagents. Copper(ll) oxide. Determination of total nitrogen content. Colorimetric method
JUS H.G8.415-1991 Reagents. So?ium hydroxide. Determination of total nitrogen content. Colorimetric method
JUS H.G8.104-1984 Reagents. Potassium chloride. Determination of total nitrogen content. Colorimetric method
JUS H.G8.343-1988 Reagents. Zine chloride. Determination of total nitrogen content. Colorinetcic metbod
JUS E.Z8.016-1993 Soups,broaths,sauces and seasonings - Determination of total nitrogen content
JUS H.G8.505-1991 Reagents. Formic acid. Determination of acetic acid content. Volumetric method
JUS H.G8.506-1991 Reagents. Formic acid. Determination of oxalic acid. Turbidimetric method
JUS H.G8.514-1991 Reagents. Potassium hydroxide. Determination of total nitrogen content. Colorimetric method
JUS H.B8.013-1981 Sulphuric acid and oleum for industrial u se. Determination of total nitrogen content Titrimetric method after distilation
JUS H.G8.502-1991 Reagents. Formic acid. Determination of sulphates content. Turbidimetric method
JUS H.B8.817-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of the particle size (granulometry)
JUS H.G8.261-1987 Reagents. Barium chloride dihydrate. Determination of total nitrogen content. Colorimetric method
JUS H.B8.731-1982 S-[1,2-bis(ethoxycarbonylj-ethyl] 0,0-dimethylphosphorodithioate. Determination ofacidity

Association Francaise de Normalisation, total nitrogen determination formic acid

NF T20-295:1968 CHEMICAL ANALYSIS OF SULPHURIC ACID AND OLEUM. DETERMINATION OF TOTAL NITROGEN.
NF EN 15560:2009 Engrais - Dosage de l'azote total dans la cyanamide calcique exempte de nitrate
NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF U42-117:1965 Products used in agriculture. Fertilizers. Determination of nitrogen content in class a nitrogenous fertilizers.
NF U42-147*NF EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrate
NF U42-141:1984 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method.
NF U42-146*NF EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free.
NF EN 15478:2009 Engrais - Détermination de l'azote total dans l'urée
NF EN ISO 8988:2006 Plastiques - Résines phénoliques - Détermination de la teneur en hexaméthylènetétramine - Méthode Kjeldahl, méthode à l'acide perchlorique et méthode à l'acide chlorhydrique
NF X31-111*NF ISO 11261:1995 Soil quality. Determination of total nitrogen. Modified kjeldahl method.
NF U42-416*NF EN 15478:2009 Fertilizers - Determination of total nitrogen in urea.
NF U42-151:1984 Fertilizers. Determination of total nitrogen content. Titrimetric method after distillation.
NF A06-555:2010 Steel - Determination of nitrogen content - Spectrophotometric method.
NF ISO 20620:2022 Engrais et amendements - Détermination de l'azote total par combustion
NF EN 15561:2009 Engrais - Dosage de l'azote total dans la cyanamide calcique nitratée
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 X34-117*NF EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen
NF U42-504*NF ISO 20620:2022 Fertilizers and soil conditioners - Determination of total nitrogen by combustion
NF T52-138:1979 Plastics. Basic materials for polyurethanes. Determination of total chloride in pure and raw isocyanates.
XP U42-656*XP CEN/TS 17403:2021 Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with
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 T20-296:1970 Chemical analysis of sulphuric acid and oleums. Determination of nitrous nitrogen and nitric nitrogen.
NF T73-282*NF EN 13716:2002 Surface active agents - Determination of total base nitrogen - Potentiometric titration.
NF EN 13716:2002 Agents de surface - Détermination de la teneur en azote total basique - Titrage potentiométrique
NF EN ISO 16948:2015 Biocombustibles solides - Détermination de la teneur totale en carbone, hydrogène et azote
NF T20-271:1968 Chemical analysis of hydrochloric acid. Determination of total acidity.
NF T20-281:1968 Chemical analysis of nitric acid. Determination of total acidity.
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 X31-418*NF ISO 13878:1998 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").
NF EN 14110:2019 Produits dérivés de corps gras - Esters méthyliques d'acides gras - Détermination de la teneur en méthanol
NF T60-703*NF EN 14103:2020 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents
NF T20-482:1979 Phosphoric acid for industrial use (including foodstuffs. Determination of oxides of nitrogen content ). 3,4-xylenol spectrophotometric method.

British Standards Institution (BSI), total nitrogen determination formic acid

BS 4267-2:1988 Ammonium nitrate - Method for determination of total nitrogen content
DD CEN/TS 15560:2007 Fertilizers. Determination of total nitrogen in calcium cyanamide nitrate free
DD CEN/TS 15561:2007 Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
BS EN 15561:2023 Inorganic fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
21/30442090 DC BS EN 15561. Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
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 15560:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
BS DD CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
BS EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
BS EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
BS EN 15478:2009 Fertilizers - Determination of total nitrogen in urea
BS 7755-3.7:1995 Soil quality. Chemical methods. Determination of total nitrogen. Modified Kjeldahl method
BS 5551-4.1.3:1986 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of total nitrogen content (titrimetric method after distillation)
BS ISO 6851:2001 Photography. Processing waste. Determination of total amino nitrogen (microdiffusion Kjeldahl method)
BS 5551-4.1.1:1981 Fertilizers - Chemical analysis - Determination of nitrogen - Nitron gravimetric method for determination of nitrate nitrogen
BS ISO 23697-1:2023 Water quality. Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Dimethylphenol colour reaction
BS 6806:2002 Textiles - Determination of formaldehyde - Method for the determination of total and free (water extraction method) formaldehyde using chromotropic acid
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 6068-2.40:1991 Water quality. Physical, chemical and biochemical methods. Method for the determination of borate by spectrometry using azomethine-H
14/30313910 DC BS ISO 15604. Fertilizers. Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
BS ISO 20620:2021 Fertilizers and soil conditioners. Determination of total nitrogen by combustion
BS ISO 23697-2:2023 Water quality. Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Chromotropic acid colour reaction
BS EN 26595:1983 Water quality - Determination of total arsenic - Silver diethyldithiocarbamate spectrophotometric method
BS EN 13716:2002 Surface active agents - Determination of total base nitrogen - Potentiometric titration
21/30426875 DC BS ISO 23697-1. Water quality. Determination of total nitrogen (TNb) in water using small-scale sealed tubes. Part 1. Dimethylphenol based method
BS EN ISO 16948:2015 Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen
21/30442087 DC BS EN 15560. Fertilizers. Determination of total nitrogen in calcium cyanamide nitrate free
BS EN 15560:2023 Inorganic fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
21/30426878 DC BS ISO 23697-2. Water quality. Determination of total nitrogen (TNb) in water using small-scale sealed tubes. Part 2. Chromotropic acid based method
BS EN 14103:2011 Fat and oil derivatives. Fatty acid methyl esters (FAME). Determination of ester and linolenic acid methyl ester contents
23/30463007 DC BS EN 12622-2. Liquid petroleum products. Determination of total contamination - Part 2. Fatty acid methyl esters
BS EN 17041:2018 Fertilizers. Determination of boron in concentrations ≤ 10 % using spectrometry with azomethine-H

German Institute for Standardization, total nitrogen determination formic acid

DIN EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free; English version of DIN EN 15560:2009-06
DIN EN 15560:2021 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free; German and English version prEN 15560:2021
DIN EN 15561:2021 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German and English version prEN 15561:2021
DIN EN 15561:2021-12 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German and English version prEN 15561:2021 / Note: Date of issue 2021-11-05*Intended as replacement for DIN EN 15561 (2009-06).
DIN EN 15561:2009-06 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German version EN 15561:2009 / Note: To be replaced by DIN EN 15561 (2021-12).
DIN EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; English version of DIN EN 15561:2009-06
DIN CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German version CEN/TS 15561:2007
DIN CEN/TS 15560:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free; German version CEN/TS 15560:2007
DIN EN ISO 13395:1996-12 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection (ISO 13395:1996); German version EN ISO 13395:1996
DIN EN 15478:2009 Fertilizers - Determination of total nitrogen in urea; English version of DIN EN 15478:2009-04
DIN EN 15478:2009-04 Fertilizers - Determination of total nitrogen in urea; German version EN 15478:2009
DIN EN 14103:2015 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents; German version EN 14103:2011
DIN EN 14103:2011 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents; German version EN 14103:2011
DIN EN ISO 8988:2006-11 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method (ISO 8988:2006); German version EN ISO 8988:2006
DIN 51732:2014 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN 51732:2007 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN EN 15750:2010-02 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version EN 15750:2009
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 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 15561:2023-10 Inorganic fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German version EN 15561:2023
DIN EN 13716:2003-05 Surface active agents - Determination of total base nitrogen - Potentiometric titration; German version EN 13716:2001
DIN EN 12662-2:2023-02 Liquid petroleum products - Determination of total contamination - Part 2: Fatty acid methyl esters; German and English version prEN 12662-2:2023 / Note: Date of issue 2023-01-06*Intended as replacement for DIN EN 12662 (2014-07).
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 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 EN 13716:2003 Surface active agents - Determination of total base nitrogen - Potentiometric titration; German version EN 13716:2001
DIN ISO 11261:1997 Soil quality - Determination of total nitrogen - Modified Kjeldahl method (ISO 11261:1995)
DIN CEN/TS 17403:2021-03 Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution w...
DIN EN ISO 16948:2015-09 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015); German version EN ISO 16948:2015
DIN EN 14110:2019 Fat and oil derivatives - Fatty Acid Methyl Esters - Determination of methanol content
DIN EN 14103:2020 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents

Korean Agency for Technology and Standards (KATS), total nitrogen determination formic acid

KS M 9106-1996 Water quality-Determination of borate(Spectrometric method using azomethine-H)
KS I ISO 13395-2008(2018) Water quality－Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
KS I ISO 11261-2008(2018) Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS I ISO 11261-2008(2021) Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS I ISO 11261:2008 Soil quality-Determination of total nitrogen-Modified Kjeldahl method
KS I ISO 13395:2008 Water quality-Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
KS 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 M ISO 8988-2010(2020) Plastics－Phenolic resins－Determination of hexamethylenetetramine content－Kjeldahl method, perchloric acid method and hydrochloric acid method
KS M ISO 5315-2007(2012) Fertilizers－Determination of total nitrogen content－Titrimetric method after distillation
KS M ISO 6851-2002(2017) Photography－Processing waste－Determination of total amino nitrogen－Microdiffusion Kjeldahl 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 H ISO 1871-2013(2018) Agricultural food products ― General directions for the determination of nitrogen by the Kjeldahl method
KS M ISO 6851:2002 Photography-Processing waste-Determination of total amino nitrogen-Microdiffusion Kjeldahl method
KS M 9143-2002 WATER QUALITY-DETERMINATION OF TOTAL ARSENIC-SILVER DIETHYLDITHIOCARBAMATE SPECTROPHOTOMETRIC METHOD
KS M 9143-2005 WATER QUALITY-DETERMINATION OF TOTAL ARSENIC-SILVER DIETHYLDITHIOCARBAMATE SPECTROPHOTOMETRIC METHOD
KS M 1911-2009 Phthalic anhydride for industrial use－Methods of test－Determination of phthalic anhydride content－Titrimetric method
KS M ISO 904:2002 Hydrochloric acid for industrial use－Determination of total acidity－Titrimetric method
KS M ISO 904-2017(2022) Hydrochloric acid for industrial use — Determination of total acidity — Titrimetric method
KS M ISO 904:2017 Hydrochloric acid for industrial use — Determination of total acidity — Titrimetric method
KS M ISO 16948:2021 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen
KS K 1390-2022 Determination of the purity for the 2,5-Furandicarboxylic acid
KS M ISO 6851-2002(2022) Photography－Processing waste－Determination of total amino nitrogen－Microdiffusion Kjeldahl 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 5313-2007(2012) High nitrogen content, straight ammonium nitrate fertilizers－Determination of oil retention
KS I ISO 9390:2006 Water quality－Determination of borate－Spectrometric method using azomethine-H
KS M 1956-2009 Formaldehyde solutions for industrial use－Determination of acidity
KS M 1956-2002(2007) Formaldehyde solutions for industrial use－Determination of acidity

Group Standards of the People's Republic of China, total nitrogen determination formic acid

T/GXAS 477-2023 Determination of total nitrogen content in sugarcane juice —sulphuric acid titrimetric method
T/QAS 071-2021 Determination of total nitrogen in brine Kjeldahl method
T/NAIA 044-2021 Urine Total Nitrogen Determination in Livestock Kjeldahl Method
T/CHBAS 7-2021 Determination method of trifluoromethanesulfonic acid
T/CHBAS 11-2021 Detection of impurities in trimethylsilyl trifluoromethanesulfonate
T/CHES 15-2017 Determination of Total Nitrogen in Water Quality Gas Phase Molecular Absorption Spectrometry
T/CHBAS 8-2021 Determination of trifluoromethanesulfonic anhydride
T/NAIA 0125-2022 Determination of total acidity of industrial hydrofluoric acid by automatic potentiometric titration

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, total nitrogen determination formic acid

GB/T 10209.1-2001 Determination of total nitrogen content for monoammonium phosphate and diammonium phosphate(Titrimetric method after distillation)
GB/T 23835.12-2009 Lithium perchlorate anhydrous.Part 12:Determination of total nitrogen content
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 10209.1-2008 Determination of monoammonium phosphate and diammonium phosphate.Part 1:Total nitrogen content
GB/T 5009.179-2003 Determination of trimethylamine nitrogen in ham
GB/T 11198.11-1989 Sulphuric acid for industrial use--Determination of oxides of nitrogen-2.4-xylenol spectrophotometric method
GB/T 2441.1-2001 Determination of urea-Determination of total nitrogen content
GB/T 11894-1989 Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photometric method
GB/T 23952-2009 Inorganic chemicals for industrial use.General method for the determination of total nitrogen content.Distillation-acid-base titrations method
GB/T 9823-1988 Method for determination of total nitrogen content in oilseed residues
GB/T 3600-2000 Fertilizers-Determination of ammoniacal nitrogen content-Formaldehyde method
GB/T 609-1988 Chemical reagent--General method for the determination of total nitrogen
GB/T 609-2006 Chemical reagent General method for the determination of total nitrogen
GB/T 609-2018 Chemical reagent.General method for the determination of total nitrogen
GB 6913.3-1986 Determination of Phosphate Total Phosphate
GB/T 5009.29-2003 Determination of sorbic acid and benzioc acid in foods
GB/T 12456-2008 Determination of total acid in foods
GB/T 41965-2022 Photography—Processing waste—Determination of total amino nitrogen(microdiffusion Kjeldahl method)
GB/T 7485-1987 Water quality--Determination of total arsenic--Silver diethyldithiocarbamate spectrophotometric method
GB/T 2441.1-2008 Determination of urea.Part 1:Total nitrogen content
GB 6913.2-1986 Determination of Phosphate Total Inorganic Phosphate
GB/T 7480-1987 Water quality--Determination of nitrate--Spectrophotometric method with phenol disulfonic acid
GB/T 8572-2001 Determination of total nitrogen content for compound fertilizers-Titrimetric method after distillation
GB/T 8572-2010 Determination of total nitrogen content for compound fertilizers titrimetric method after distillation
GB/T 17767.1-1999 Determination of total nitrogen content for organic-inorganic compound fertilizers
GB/T 32477-2016 Plastics.Determination of total chlorine content in toluene diisocyanates for use in the production of polyurethanes
GB/T 17134-1997 Soil quality--Determination of total arsenic--Silver diethyldithiocarbamate spectrophotometry
GB/T 8314-2002 Tea--Determination of free amino acids content
GB/T 12456-1990 Method for determination of total acid in foods
GB/T 12574-1990 Jet fuels--Determination of total acid number
GB/T 12574-2023 Jet fuel total acid number determination method
GB/T 9823-2008 Inspection of grain and oils.Determination of total nitrogen content in plant oilseeds residues
GB/T 7493-1987 Water quality--Determination of nitrogen (nitrite)--Spectrophotometric method
GB/T 1628.4-2000 Glacial acetic acid for industrial use-Determination of formic acid content-Iodometric method
GB/T 21703-2008 Determination of benzoic and sorbic acid in milk and dairy products
GB/T 5543-2006 Resin finishing agent.Determination of total formaldehyde content、free formaldehyde content and methylol formadehyde content
GB/T 21911-2008 Determination of phthalate esters in foods
GB/T 20388-2006 Textiles. Determination of the content of phthalates
GB/T 28190-2011 Textiles.Determination of dimethyl fumarate
GB/T 12143.2-1989 Determination method for amino nitrogen content in fruit and vegetable juice beverages--Formol number
GB/T 24583.1-2009 Vanadium-Nitrogen alloy.Determination of vanadium content.The ammonium ferrous sulfate titration method

CEN - European Committee for Standardization, total nitrogen determination formic acid

PD CEN/TS 15560:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
PD CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
PD CEN/TS 15478:2006 Fertilizers - Determination of total nitrogen in urea
PD CEN/TS 15604:2007 Fertilizers - Determination of different forms of nitrogen in the same sample@ containing nitrogen as nitric@ ammoniacal@ urea and cyanamide nitrogen
PREN 14103-2018 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents

Lithuanian Standards Office , total nitrogen determination formic acid

LST EN 15560-2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
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 15561-2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
LST ISO 9390:1998 Water quality. Determination of borate. Spectrometric method using azomethine-H
LST EN 15478-2009 Fertilizers - Determination of total nitrogen in urea
LST EN ISO 13395:2000 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection (ISO 13395:1996)
LST EN ISO 8988:2007 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method (ISO 8988:2006)
LST EN 15604-2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
LST EN 13716-2002 Surface active agents - Determination of total base nitrogen - Potentiometric titration
LST CEN/TS 17403-2021 Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with
LST EN 14103-2011 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents
LST EN 14104-2003 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of acid value

AENOR, total nitrogen determination formic acid

UNE-EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
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 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
UNE 77318:2001 Soil quality. Determination of total nitrogen. Modified Kjeldahl method.
UNE-EN 15478:2009 Fertilizers - Determination of total nitrogen in urea
UNE-EN ISO 13395:1997 WATER QUALITY. DETERMINATION OF NITRITE NITROGEN AND NITRATE NITROGEN AND THE SUM OF BOTH BY FLOW ANALYSIS (CFA AND FIA) AND SPECTROMETRIC DETECTION. (ISO 13395:1996).
UNE-EN ISO 8988:2007 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method (ISO 8988:2006)
UNE-EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
UNE-EN 13716:2002 Surface active agents - Determination of total base nitrogen - Potentiometric titration.
UNE 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).
UNE 84089:1994 COSMETIC RAW MATERIALS. DETERMINATION OF 2-HYDROXYBENZOICO ACID (SALICYLIC ACID) IN p-HIDROXYBENZOATES.
UNE-EN 14103:2011 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents
UNE-EN 14104:2003 Oil and fat derivatives. Fatty Acid Methyl Esters (FAME). Determination of acid value.
UNE 84623:1998 COSMETIC RAW MATERIALS. DIMETHYLDIMETHYLOL HYDANTOINE. DETERMINATION OF TOTAL FORMALDELYDE. POTENCIOMETRIC METHOD.

未注明发布机构, total nitrogen determination formic acid

BS 4267-2:1988(1999) Ammonium nitrate — Part 2 : Method for determination of total nitrogen content
BS EN ISO 13395:1996(1998) Water quality — Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
BS EN 26595:1993(2008)*BS 6068-2.1:1993*ISO 6695:1982 Water quality — Determination of total arsenic — Silver diethyldithiocarbamate spectrophotometric method

International Organization for Standardization (ISO), total nitrogen determination formic acid

ISO 3331:1975 Ammonium nitrate for industrial use — Determination of total nitrogen content — Titrimetric method after distillation
ISO 914:1977 Sulphuric acid and oleum for industrial use; Determination of total nitrogen content; Titrimetric method after distillation
ISO 731-2:1977 Formic acid for industrial use; Methods of test; Part II : Determination of total acidity; Titrimetric method
ISO 11261:1995 Soil quality - Determination of total nitrogen - Modified Kjeldahl 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 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 2363:1972 Sulphuric acid and oleums for industrial use; Determination of oxides of nitrogen; 2,4- Xylenol spectrophotometric method
ISO 3099:1974 Oilseed residues — Determination of total nitrogen content
ISO 5315:1984 Fertilizers; Determination of total nitrogen content; Titrimetric method after distillation
ISO 1980:1977 Nitric acid for industrial use; Determination of total acidity; Titrimetric method
ISO 904:1976 Hydrochloric acid for industrial use; Determination of total acidity; Titrimetric method
ISO 20620:2021 Fertilizers and soil conditioners - Determination of total nitrogen by combustion
ISO 3709:1976 Phosphoric acid for industrial use (including foodstuffs); Determination of oxides of nitrogen content; 3,4- Xylenol spectrophotometric method
ISO 29541:2010 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method
ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen
ISO 6595:1982 Water quality; Determination of total arsenic; Silver diethyldithiocarbamate spectrophotometric method
ISO 21793:2020 Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb), dissolved bound nitrogen (DNb), total bound phosphorus (TPb) and dissolved boun
ISO 23697-1:2023 Water quality — Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes — Part 1: Dimethylphenol colour reaction
ISO/R 1906:1971
ISO/R 1907:1971
ISO 9390:1990 Water quality; determination of borate; spectrometric method using azomethine-H
ISO 5375:1979 Condensed phosphates for industrial use (including foodstuffs); Determination of oxides of nitrogen content; 3,4- Xylenol spectrophotometric method
ISO 2225:1972 Formaldehyde solutions for industrial use; Determination of acidity
ISO 23697-2:2023 Water quality — Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes — Part 2: Chromotropic acid colour reaction

Professional Standard - Agriculture, total nitrogen determination formic acid

GB 10511-1989 Determination of total nitrogen content in nitrophosphate fertilizers Titration after distillation
NY/T 2542-2014 Fertilizers.Determination of total nitrogen content
SL/T 788.1-2019 Part 1: Determination of total nitrogen in water quality
ZB X 66037-1987 total acid assay
GB 8572-1988 Determination of total nitrogen content in compound fertilizer
237药典三部-2020 Content Determination Method 3116 Determination of Methyl p-Hydroxybenzoate and Propyl p-Hydroxybenzoate
NY/T 1977-2010 Water-suluble fertilizers-Determination of total nitrogen, phosphorus and potassium content
GB 609-1988 General method for the determination of total nitrogen content of chemical reagents
210药典四部-2015 3100 Determination method of content 3116 Determination method of methyl p-hydroxybenzoate and propyl p-hydroxybenzoate
198药典四部-2020 3100 Determination method of content 3116 Determination method of methyl p-hydroxybenzoate and propyl p-hydroxybenzoate
NY/T 30-1986 Determination of rare earth oxide content in soil.Chlorophosphonazo-p-hippuric acid photometric method
GB 6260-1986 Determination of Total Oxidized Rare Earth in Soil Spectrophotometric Method for Azochlorophosphorus Hippurate
218药典三部-2015 Content determination method 3116 General rules for the determination of methyl p-hydroxybenzoate and propyl p-hydroxybenzoate content 59
GB/T 5009.29-1996 Determination method of sorbic acid and benzoic acid in food
193药典三部-2010 Appendix VI VIT Determination of Methyl p-Hydroxybenzoate and Propyl p-Hydroxybenzoate
GB/T 42955-2023 Determination of total nitrogen content in fertilizers Dumas combustion method
GB/T 8314-1987 Determination of Total Free Amino Acids in Tea

SE-SIS, total nitrogen determination formic acid

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

Taiwan Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

CNS 15051-2007 Fat and oil derivatives - Fatty acid methyl esters (FAME) - Determination of ester and linolenic acid methyl ester contents
CNS 6198-1980 Determination of Acidity of Tritolyl Phosphate for Industrial Use(Volumetric Method)
CNS 12630-2004 Method of test for fruit and vegetable juices and drinks－Determination of formol nitrogen
CNS 12630-2006 Method of test for fruit and vegetable juice products - Determination of Formol nitrogen

PL-PKN, total nitrogen determination formic acid

PN C04576 ArkusZ12-1973 Water and waste water Tests for nitrogenDetermination of total nitrogen of Kjeldahl
PN Z04092 Arkusz 01-1974 Air purity protectlon Tests tor nitric acid and nitrogen oxides Determination of nitric acid and total amount of nitric acid and nitrogen oxides in the work station by the colorimetric method with phenoldisulphonic acid
PN Z04092-05-1990 Air purity protection Tests for nitric acid and nitrogen oxides Determination of nitrogen oxide, dioxide and total nitrogen oxides in waste gases (emission)
PN A04016-1962 Food products. Determination of benzoic oc'd confents
PN C87075-1992 Fertilizers. High nitrogen content straight ammonium nitrate fertilizers. Determination of pH
PN-EN 17041-2018-07 P Fertilizers--Determination of boron in concentrations ≤ 10 % using spectrometry with azomethine-H
PN C97081-1969 Coal derivatives Determination of m-cresol conlents in cresylic acid
PN A86746-1974 Fish products Determination of total acidity

CZ-CSN, total nitrogen determination formic acid

CSN 68 4124-1980 Determination of small mounts of total nitrogen
CSN 65 1025 Cast.10-1989 Sulphuric acid for industrial use. pectrophotometric method for the etermination of total nitrogen xides
CSN 65 4836-1983 Minerál fertilizers Methode for determination of total nitrogen content
CSN 64 0920-1966 Determination of total capaoity (total acidity) of strong acidic cation exchange resins
CSN 58 8773-1994 Methods of test for fats and oils Determination and detection of benzoic acid
CSN 64 0921-1967 Determination of total capacity and total acidity of weakly acidic cation exchange resins
CSN 66 3312-1980 Phthalic anhydride. Determtaation of maleic anhydride conteait
CSN 56 0216 Cast.5-1985 Testing methods for ines. Determination f total acidity
CSN 56 0216 Cast.5-1979 Testing method? for winos. Determina- ion of total acidity
CSN 58 8774-1994 Methods of test for fats and oils Spectrophotometric determination of benzoic acid

Association of Official Analytical Chemists (AOAC), total nitrogen determination formic acid

AOAC Official Method 2001.14 Determination of total nitrogen in cheese
AOAC 991.20 AOAC Official Method 991.20 Nitrogen (Total) in Milk Kjeldahl Methods
AOAC Official Method 975.40 Determination of pesticide methyl carbamate residues

RU-GOST R, total nitrogen determination formic acid

GOST 30181.3-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in fertilizers with nitrate nitrogen
GOST 26715-1985 Organic fertilizers. Methods for determination of total nitrogen
GOST EN 15560-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide nitrate free
GOST EN 15561-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
GOST 29302-1992 Ammonium nitrate for industrial use. Method for determination of total nitrogen content (titrimetric) after distillation
GOST 10671.4-2016 Reagents. Methods for determination of total nitrogen impurity
GOST EN 15478-2013 Fertilizers. Determination of total nitrogen in urea
GOST 24596.3-1981 Feed phosphates. Methods for determination of nitrogen
GOST 24596.3-2015 Feed phosphates. Method for determination of nitrogen
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 30181.6-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in ammonium salts (in ammonium form, using the formaldehyde method)
GOST 24445.2-1980 Phthalic anhydride for industrial use. Methods for the determination of phthalic acid
GOST 30553-1998 Hydrochloric acid for industrial use. Determination of total acidity of titrimetric method
GOST 32524-2013 Methylmetacrylate. Determination in air
GOST R 50706.1-1994 Nitric acid for industrial use. Determination of total acidity. Titrimetric method
GOST 27753.7-1988 Greenhouse grounds methods for determination of nitrate nitrogen
GOST R 50706.2-1994 Nitric acid for industrial use. Determination of nitrous compounds. Titrimetric method
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 EN 15750-2016 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
GOST R 50484-1993 Phthalic anhydride for industrial use. Methods of test. Part 4. Determination of phthalic anhydride content. Titrimetric method
GOST 25742.2-1983 Methanol poison, technical. Method for free acids determination
GOST 32532-2013 Phtalic anhydride. Determination in air
GOST 32457-2013 Phthalic anhydride. Determination in air

VN-TCVN, total nitrogen determination formic acid

TCVN 6498-1999 Soil quality.Determination of total nitrogen.Modifierd Kejldahl method
TCVN 5265-1990 Bee products.Determination of total nitrogen content
TCVN 6182-1996 Water quality.Determination of total arsenic.Silver diethyldithiocarbamate spectrophotometry method
TCVN 7252-2003 Tobacco and tobacco products.Determination of total nitrogen content
TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content
TCVN 6645-2000 Soil quality.Determination of total nitrogen content by dry combustion ("elemental analysis")
TCVN 3708-1990 Aquatic products.Method for the determination of nitrogen amino acid content
TCVN 3756-1983 Natural gas.Method for the determination of oxygen, nitrogen and methane by gas chromatography

Jilin Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

DB22/T 1932-2013 Determination method of total nitrogen content in peat (Kjeldahl method)

RO-ASRO, total nitrogen determination formic acid

STAS SR ISO 7408:1993 Fertilizers. Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide. Titrimetric method
STAS 11624/1-1983 PHOSPHATING SOLUTIONS Determination of phosphoric acid, azotic acid and sodiimi nitrate
SR ISO 4176:1981 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method
STAS SR 4895-5-1997 Tobacco and tobacco products. Determination of total nitrogen content
SR ISO 5315:1984 Fertilizers. Determination of totai nitrogen content.Titrimetric method after distilation
STAS 6182/1-1979 WINE Determination of total acidity
STAS 6182/39-1975 WINE Determination of benzoic acid
STAS 723/16-1977 LEATHERS Determination of acids and of the total basic capacity
STAS 9029-1986 DRESSED LEATHERS Determination of total nitrogen and hide snbstance
STAS 11624/4-1983 PHOSPHATING SOLUTIONS Total and free acidity determination

GOSTR, total nitrogen determination formic acid

GOST R 58596-2019 Soils. Methods for determination of total nitrogen
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

American Society for Testing and Materials (ASTM), total nitrogen determination formic acid

ASTM UOP432-65T Total Nitrogen in Liquefied Petroleum Gases by Acid Extraction-Kjeldahl Procedure
ASTM D8001-16e1 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D8001-16 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D4661-03 Standard Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in Isocyanates
ASTM E258-67(2002) Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method
ASTM D3228-22 Standard Test Method for Total Nitrogen in Lubricating Oils and Fuel Oils by Modified Kjeldahl Method
ASTM D7597-16(2017) Standard Test Method for Determination of Diisopropyl Methylphosphonate, Ethyl Hydrogen Dimethylamidophosphate, Ethyl Methylphosphonic Acid, Isopropyl Methylphosphonic Acid, Methylphosphonic Acid and
ASTM D8083-16 Standard Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection
ASTM D6584-10 Standard Test Method for Determination of Total Monoglyceride, Total Diglyceride, Total Triglyceride, and Free and Total Glycerin in B-100 Biodiesel Methyl Esters by Gas Chromatography

Shandong Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

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

European Committee for Standardization (CEN), total nitrogen determination formic acid

EN 15561:2023 Inorganic fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
EN 15478:2009 Fertilizers - Determination of total nitrogen in urea
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 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
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 13716:2001 Surface active agents - Determination of total base nitrogen - Potentiometric titration
PD CEN/TS 17403:2021 Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with
EN 15560:2023 Inorganic fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
EN 14103:2011 Fat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of ester and linolenic acid methyl ester contents
EN 26595:1992 Water Quality - Determination of Total Arsenic - Silver Diethyldithiocarbamate Spectrophotometric Method (ISO 6595:1982)
EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
EN 17041:2018 Fertilizers - Determination of boron in concentrations ��10 % using spectrometry with azomethine-H
FprCEN/TS 17751-2021 Inorganic fertilizers - Determination of specific parameters in ammonium nitrate fertilizers of high nitrogen content
CEN/TS 17751:2022 Inorganic fertilizers - Determination of specific parameters in ammonium nitrate fertilizers of high nitrogen content

Indonesia Standards, total nitrogen determination formic acid

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 4146-2013

ZA-SANS, total nitrogen determination formic acid

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

Professional Standard - Petrochemical Industry, total nitrogen determination formic acid

SH/T 1545-1993 Determination of acid value of dimethyl terephthalate
SH/T 1477-1992 Determination of Dimethyl Terephthalate Ash
SH/T 1481-1992 Determination of crystallization point of dimethyl terephthalate
SH/T 1544-1993 Determination of iron content in dimethyl terephthalate
SH/T 1478-1992 Determination of transesterification rate of dimethyl terephthalate
SH/T 1612.2-1995 Determination of acid value of purified terephthalic acid for industrial use
SH/T 1479-1992 Colorimetric determination of dimethyl terephthalate (platinum-cobalt label)

American National Standards Institute （ANSI), total nitrogen determination formic acid

ANSI/ASTM D3444:2000 Test Method for Total Acid Number of Tricholorotriflourethane

工业和信息化部, total nitrogen determination formic acid

HG/T 5669-2019 Determination of total nitrogen in textile dyeing and finishing auxiliaries
YB/T 4566.2-2016 Determination of nitrogen content of vanadium iron nitride, distillation and separation-acid-base neutralization titration method
YB/T 4566.3-2016 Determination of vanadium content in iron vanadium nitride Ferrous ammonium sulfate titration method

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会, total nitrogen determination formic acid

GB/T 33317-2016 Plastics—Phenolic resins—Determination of hexamethylenetetramine content—Kjeldahl method,perchloric acid method and hydrochloric acid method
GB/T 34532-2017 Coking wastewater—Determination of ammonia nitrogen content—Formaldehyde method
GB/T 33400-2016 Determination of total contamination in middle distillates, diesel fuels andDetermination of total contamination in middle distillates, diesel fuels and fatty acid methyl esters

Professional Standard - Environmental Protection, total nitrogen determination formic acid

HJ 667-2013 Water quality.Determination of total nitrogen by continuous flow analysis (CFA) and N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometry
HJ 668-2013 Water quality.Determination of total nitrogen by flow injection analysis (FIA) and N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometry
HJ 636-2012 Water quality.Determination of total nitrogen.Alkaline potassium persulfate digestion UV spectrophotometric method
HJ 634-2012 Soil.Determination of ammonium, nitrite and nitrate by extraction with potassium chloride solution-spectrophotometric methods
HJ 38-2017 Stationary source emission--Determination of total hydrocarbons, methane and nonmethane hydrocarbons--Gas chromatography
HJ/T 64.3-2001 stationary source emission.Determination of cadmium.p-Azobenzenediazoaminazobenzene sulfonic acid spectrophotometric method
HJ 604-2017 Ambient air.Determination of total hydrocarbons, methane and nonmethane hydrocarbons.Direct injection/gas chromatography
HJ 536-2009 Water quality.Determination of ammonia nitrogen.Salicylic acid spectrophotometry
HJ 675-2013 Determination of nitrogen oxide emissions from stationary sources by acid-base titration method

TR-TSE, total nitrogen determination formic acid

TS 2918-1978 PHOSPHORIC ACID FOR INDUSTRIAL USE (INCLUDING FOODSTUFFS) — DETERMINATION OF OXIDES OF NITROGEN CONTENT — 3,4 — XYLENOL SPECTROPHOTOMETRY
TS 974-1971 DETERMINATION OF NITROGEN, TOTAL SULPHUR CHLORINE AND PHOSPHORUS ?N COKE
TS 1962-1975 CRESYLIC ACID FOR INDUSTRIAL USE DETERMINATION OF m-CRESOL CONTENT
TS 2461-1976 NITRIC ACID FOR INDUSTRIAL USE DSTERMINATION OF TOTAL ACIDITY VOLUMETRIC METHOD
TS 1961-1975 CRESYLIC ACID AND XYLENOLS FOR INDUSTRIAL USE DETERMINATION OF o-CRE?OL CONTENT
TS 1960-1975 CRESYLIC ACID AND XYLENOLS FOR INDUSTRIAL USE MEASUREMENT OF COLOUR

PT-IPQ, total nitrogen determination formic acid

NP 1841-1985

国家市场监督管理总局、中国国家标准化管理委员会, total nitrogen determination formic acid

GB/T 40723-2021 Rubber—Determination the contents of total sulfur and total nitrogen — Automatic analyser method
GB/T 40183-2021 Determination of DNA methylation—Pyrosequencing
GB/T 24583.1-2019 Vanadium-nitrogen—Determination of vanadium content—Ammonium ferrous sulfate titration method

Hebei Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

DB13/T 1224-2010 Determination method of total nitrogen in organic chemical products

Professional Standard - Urban Construction, total nitrogen determination formic acid

CJ/T 77-1999 Municipal sewage.Determination of total nitrogen.Distillation and titration method
CJ/T 73-1999 Municipal sewage.Determination of total arsenic.Silver diethyldithiocarbamate spectrophotometric method

Professional Standard - Textile, total nitrogen determination formic acid

FZ/T 50057-2022 Determination of total antimony content in polyethylene terephthalate (PET) fibers

CU-NC, total nitrogen determination formic acid

NC 23-04-1968 Sulphuric acid. Determination oí total acidity. Volumetric method.

Yunnan Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

DB53/T 624-2014 Determination of Nitrate Nitrogen and Nitrite Nitrogen in Coking Wastewater by Dairyler's Alloy Reduction-Neutralization Titration

ES-AENOR, total nitrogen determination formic acid

UNE 55-595-1981

KR-KS, total nitrogen determination formic acid

KS M ISO 904-2017 Hydrochloric acid for industrial use — Determination of total acidity — Titrimetric method
KS M ISO 16948-2021 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen

中华人民共和国环境保护部, total nitrogen determination formic acid

GB 7485-1987 Water quality-Determination of total arsenic-Silver diethyldithiocarbamate spectrophotometric method
GB 7480-1987 Water quality-Determination of nitrate-Spectrophotometric method with phenol disulfonic acid
GB 7493-1987 Water quality-Determination of nitrogen (nitrite)-Spectrophotometric method

National Metrological Verification Regulations of the People's Republic of China, total nitrogen determination formic acid

JJG 656-2013 Verification Regulation of Nitrate-Nitrogen Automatic Analyzers

AT-ON, total nitrogen determination formic acid

ONORM L 1095-2002 Chemical analyses of soils - Determination of total nitrogen by dry combustion
ONR CEN/TS 17403-2021 Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with
ONORM M 6606-1993 Water quality - Determination of borate - Spectrophotometric method using azomethine-H
ONORM S 7009-1982 Testing of leather; determination of the contents of total nitrogen and of ammonium salts; calculation of hide substance

Professional Standard - Commodity Inspection, total nitrogen determination formic acid

SN/T 3097-2012 Determination of total nitrogen in fertelezers.Combustion

IT-UNI, total nitrogen determination formic acid

UNI CEN/TS 17403-2021 Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with

ES-UNE, total nitrogen determination formic acid

UNE-CEN/TS 17403:2021 Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution w...
UNE-EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015)
UNE-EN 17041:2019 Fertilizers - Determination of boron in concentrations = 10 % using spectrometry with azomethine-H

Military Standard of the People's Republic of China-General Armament Department, total nitrogen determination formic acid

GJB 4359-2002 Determination of dimethyl methyl phosphate by gas chromatography

中华人民共和国国家卫生和计划生育委员会, total nitrogen determination formic acid

GBZ/T 300.122-2017 Determination of Toxic Substances in Workplace Air Part 122: Methyl and Ethyl Formate

Professional Standard - Tobacco, total nitrogen determination formic acid

YC/T 33-1996 Tobacco and tobacco products-Determination of total nitrogen-Kjeldahl method
YC/T 161-2002 Tobacco and tobacco products----Determination of total nitrogen----Continuous flow method

Professional Standard - Water Conservancy, total nitrogen determination formic acid

SL 84-1994 Determination of nitrogen (nitrate)(Ultraviolet spectrophtometric method)
SL 83-1994 Determination of alkalinity,bicarbonate and carbonate (Acid titration method)

Beijing Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

DB11/T 1367-2016 Determination of methane/total hydrocarbons/non-methane total hydrocarbons in exhaust gas from stationary pollution sources Portable hydrogen flame ionization detector method

Association of German Mechanical Engineers, total nitrogen determination formic acid

VDI 2456-2004 Stationary source emissions - Reference method for determination of the sum of nitrogen monoxide and nitrogen dioxide - Ion chromatography method

PH-BPS, total nitrogen determination formic acid

PTS 98-1970 Standardization of the Method of Test for the Determination of Total Nitrogen Content.Devarda Method

Tianjin Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

DB12/T 1023-2020 Determination of total nitrogen content in organic fertilizers Dumas combustion method

ET-QSAE, total nitrogen determination formic acid

ES 514-2000

Professional Standard - Medicine, total nitrogen determination formic acid

YY/T 1222-2014 Totle T3 quantitative labelling immunoassay kit

NL-NEN, total nitrogen determination formic acid

NEN-ISO 6595:1993 Water quality. Determination of total arsenic. Silver diethyldithiocarbamate spectrophotometric method (ISO 6595:1982)

Professional Standard - Ferrous Metallurgy, total nitrogen determination formic acid

YB/T 5097-2007 1,8-Naphthalic anhydride
YB/T 5098-2007 1,8-Naphthalic anhydride
YB/T 5097-1993 1,8-naphthalene dicarboxylic anhydride content determination method
YB/T 5098-1993 Method for Determination of Melting Point of 1,8-Naphthalic Anhydride

Anhui Provincial Standard of the People's Republic of China, total nitrogen determination formic acid

DB34/T 1541-2011 Determination of Azodicarbonamide in wheat flour High performance liquid chromatography method

National Health Commission of the People's Republic of China, total nitrogen determination formic acid

GB 5009.283-2021 Determination of Azodicarbonamide in Food Safety National Standards