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Database: 365,228(8 Aug 2026)

What are the methods for testing protein subunits?

What are the methods for testing protein subunits?, Total:129 items.

The international standard classification for "What are the methods for testing protein subunits?" includes: General methods of tests and analysis for food products , food products in general , Animal feeding stuffs , Edible oils and fats. Oilseeds , Fruits. Vegetables , Biology. Botany. Zoology .

The Chinese standard classification for "What are the methods for testing protein subunits?" includes: Basic standards and general methods , Basic standards and general methods , Livestock and poultry feed and additive , Oil crop and product , Melon, fruit and vegetable planting and product , Food sanitation .


General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

  • GB/T 17811-1999 Determination of digestibility in animal protein feeds--Pepsin method
  • GB/T 14771-1993 Method for determination of protein content in foods
  • GB/T 8856-1988 Method for determination of crude protein in fruit and vegetable products
  • GB/T 17811-2008 Determination of pepsin digestibility in animal protein feeds - Filtration method
  • GB/T 19495.8-2004 Detection of genetically modified plants and derived products-Protein based methods
  • GB/T 14489.2-1993 Method for determination of crude protein in oilseed

Professional Standard - Agriculture

  • GB/T 5009.5-1985 Method for determination of protein in foods
  • GB 8856-1988 Method for Determination of Crude Protein in Fruit and Vegetable Products

未注明发布机构

  • DIN EN ISO 8968-4 E:2013-09 Determination of nitrogen content of milk and milk products Part 4: Determination of protein and non-protein nitrogen content and calculation of pure protein content (Reference Method) (Draft)
  • DIN EN ISO 21572 Berichtigung 1:2005 Food – Methods for the detection of genetically modified organisms and their products – Protein methods
  • DIN ISO 5546 E:2020-08 Caseins and caseinates - Determination of pH (Reference method)
  • DIN ISO 5550 E:2020-06 Caseins and caseinates - Determination of moisture content (Reference method)
  • DIN EN ISO 21572:2004 Food – Methods for the detection of genetically modified organisms and their products – Protein methods

国家市场监督管理总局、中国国家标准化管理委员会

CZ-CSN

Korean Agency for Technology and Standards (KATS)

  • KS H 1204-2021 Testing method for crude proteins content
  • KS J ISO 21572:2009 Foodstuffs-Methods for the detection of genetically modified organisms and derived products-Protein based methods
  • KS H ISO 5546:2006 Caseins and caseinates-Determination of pH(Reference method)
  • KS H ISO 5549:2021 Caseins and caseinates — Determination of protein content(Reference method)
  • KS H ISO 5549-2006(2016) Caseins and caseinates-Determination of protein content(Reference method)
  • KS H ISO 5549:2006 Caseins and caseinates-Determination of protein content(Reference method)
  • KS J ISO 21572-2019 Foodstuffs-Methods for the detection of genetically modified organisms and derived products-Protein based methods
  • KS J ISO 21572-2009(2019) Foodstuffs-Methods for the detection of genetically modified organisms and derived products-Protein based methods
  • KS H ISO 5542-2006(2016) Milk-Determination of protein content-Amido black dye-binding method(Rountine method)
  • KS H ISO 5542:2021 Milk — Determination of protein content — Amido black dye-binding method(Rountine method)
  • KS H ISO 8195-2006 Caseins and caseinates-Determination of nitrate and nitrite contents-Method by cadmium reduction and spectrometry

International Organization for Standardization (ISO)

  • ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods
  • ISO 21572:2013 Foodstuffs - Molecular biomarker analysis - Protein-based methods
  • ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
  • ISO 5546:2010|IDF 115:2010 Determination of pH value of casein and caseinate (standard method)
  • ISO 5549:1978 Caseins and caseinates; Determination of protein content (Reference method)
  • ISO 21572:2004/Cor 1:2005 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods; Technical Corrigendum 1
  • 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 | IDF 20-4:2016 Milk and milk products — Determination of nitrogen content — Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
  • ISO 5546:2010 | IDF 115:2010 Caseins and caseinates — Determination of pH (Reference method)
  • ISO 8195:1987 Caseins and caseinates; Determination of nitrate and nitrite contents; Method by cadmium reduction and spectrometry
  • ISO 20418-1:2018 Textiles - Qualitative and quantitative proteomic analysis of some animal hair fibres - Part 1: Peptide detection using LC-ESI-MS with protein reduction

SCC

  • AENOR UNE 34400-7:1967 Test methods for wheat flour. Determination of protein.
  • UNE 34400-7:1967 TEST METHODS OF WHEAT FLOUR. PROTEIN DETERMINATION
  • BS EN ISO 21572:2004 Foodstuffs. Methods for the detection of genetically modified organisms and derived products. Protein based methods
  • DANSK DS/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)
  • UNE 34835:1985 MILK. DETERMINATION OF PROTEIN CONTENT. AMIDO BLACK DYE-BINDING METHOD. ROUTINE METHOD.
  • NS-EN ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods (ISO 21572:2004)
  • UNE-EN ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods (ISO 21572:2004)
  • DANSK DS/ISO 21572:2019 Foodstuffs – Molecular biomarker analysis – Protein-based methods
  • NS-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)
  • BS 6248-9:1984 Caseins and caseinates-Method for the determination of scorched particles
  • AENOR UNE-EN ISO 8968-4:2016 Milk and dairy products. Determination of nitrogen content. Part 4: Determination of protein and non-protein nitrogen content and calculation of true protein content (Reference method). (ISO 8968-4:2016)

IN-BIS

  • IS 2006-1988 Methods for the quantitative chemical analysis of binary mixtures of protein fibers and certain other non-protein fibers
  • IS 7481-1974 How to measure protein efficiency ratio (PER)
  • IS 7219-1973 Methods for determination of protein in food and feed

RU-GOST R

AT-ON

British Standards Institution (BSI)

  • BS ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
  • BS 6248-11:1987 Caseins and caseinates. Method for determination of nitrate and nitrite contents
  • 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 4317-19:1990 Methods of test for cereals and pulses - Determination of protein quality of wheat by the sodium dodecyl sulphate (SDS) test
  • BS EN ISO 21572:2013 Foodstuffs. Molecular biomarker analysis. Protein-based methods
  • BS EN ISO 1833-4:2023 Textiles. Quantitative chemical analysis. Mixtures of certain protein fibres with certain other fibres (method using hypochlorite)
  • BS EN ISO 1833-4:2011 Textiles. Quantitative chemical analysis. Mixtures of certain protein and certain other fibres (method using hypochlorite)
  • BS EN ISO 1833-4:2010 Textiles. Quantitative chemical analysis. Mixtures of certain protein and certain other fibres (method using hypochlorite)
  • BS EN ISO 8968-4:2016(2017) Milk and milk products — Determination of nitrogen content Part 4 : Determination of protein and non - protein nitrogen content and true protein content calculation (Reference method)
  • BS EN ISO 1833-4:2017 Textiles. Quantitative chemical analysis. Mixtures of certain protein fibres with certain other fibres (method using hypochlorite)

IX-EU/EC

  • 83/417/EEC-1983 Council Directive on the Approximation of the Laws of the Member States Relating to Certain Lactoproteins (Caseins and Caseinates) Intended for Human Consumption

KR-KS

  • KS H ISO 5549-2021 Caseins and caseinates — Determination of protein content(Reference method)
  • KS H ISO 5542-2021 Milk — Determination of protein content — Amido black dye-binding method(Rountine method)
  • KS K ISO 20418-3-2023 Textiles — Qualitative and quantitative proteomic analysis of some animal hair fibres — Part 3: Peptide detection using LC-MS without protein reduction

GOSTR

  • GOST 34551-2019 Сonfectionery. Method for determination of mass fraction of protein

Standard Association of Australia (SAA)

  • AS 2001.7.5:1983 METHODS OF TEST FOR TEXTILES PART 7-QUANTITATIVE ANALYSIS OF FIBRE MIXTURES-AS 2001.7.5 BINARY MIXTURES OF CERTAIN PROTEIN FIBRES (WOOL, ANIMAL HAIR, SILK OR PROTEIN) AND CERTAIN OTHER FIBRES (METHOD USING ALKALINE SODIUM HYPOCHLORITE)
  • 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)

European Committee for Standardization (CEN)

  • EN ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods Incorporating Corrigendum February 2005
  • EN ISO 20418-1:2018 Textiles - Qualitative and quantitative proteomic analysis of some animal hair fibres - Part 1: Peptide detection using LC-ESI-MS with protein reduction

American Society for Testing and Materials (ASTM)

  • ASTM D7818-12 Standard Test Method for Enumeration of Proteolytic Bacteria in Fresh (Uncured) Hides and Skins
  • ASTM D6188-17 Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall
  • ASTM D3048-89(2016) Standard Test Method of Assay for Alkaline Protease
  • ASTM D3048-89(2009) Standard Test Method of Assay for Alkaline Protease
  • ASTM D3048-89(1995)e1 Standard Test Method of Assay for Alkaline Protease
  • ASTM E1759-95(2003) Standard Test Method for Isoaspartic Acid in Proteins: Method for the Determination of Asparagine Deamidation Products
  • ASTM E1759-95 Standard Test Method for Isoaspartic Acid in Proteins Method for the Determination of Asparagine Deamidation Products
  • ASTM E1470-92(1998) Standard Test Method for Characterization of Proteins by Electrophoretic Mobility

ZA-SANS

  • SANS 21572:2005 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods

VN-TCVN

  • TCVN 7607-2007 Foodstuffs.Methods of analysis for the detection of genetically modified organisms and derived products.Protein based methods
  • TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content

Lithuanian Standards Office

  • LST EN ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods (ISO 21572:2004)
  • LST EN ISO 21572:2004/AC:2005 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods (ISO 21572:2004)
  • LST ISO 5549:2001 Caseins and caseinates. Determination of protein content (Reference method) (identical ISO 5549:1978)

ES-UNE

  • 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)

German Institute for Standardization

  • 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 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic method
  • DIN 10470:2011 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method

Association Francaise de Normalisation

  • NF V04-221-4*NF EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4 : determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
  • NF V04-387:1985 Caseins and caseinates. Determination of protein content (reference method).
  • NF EN ISO 20418-3:2020 Textiles - Qualitative and quantitative proteomic analysis of certain animal fibers - Part 3: detection of peptides by LC-MS without protein reduction
  • NF V03-021:2013 Foodstuffs - Molecular biomarker analysis - Protein-based methods
  • NF EN ISO 8968-4:2016 Milk and dairy products - Determination of nitrogen content - Part 4: determination of protein and non-protein nitrogen content and calculation of true protein content (Reference method)
  • NF ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
  • NF EN ISO 20418-1:2018 Textiles - Qualitative and quantitative proteomic analysis of certain animal fibers - Part 1: detection of peptides by LC ESI MS with protein reduction
  • NF V04-390:1988 Caseins and caseinates. Determination of nitrate and nitrite contents. Method by cadmium reduction and spectrometry.

AENOR

  • UNE 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).
  • UNE 34081:1975 ANALYSIS METHODS FOR CHOCOLATES. MILK PROTEINS.

GOST

  • GOST ISO 21572-2009 Food products Analytical methods for the detection of genetically modified organisms and derivative products Protein based methods

ES-AENOR

  • UNE 34-835-1985 milk. Protein content determination by aminoblack method (conventional method)

Danish Standards Foundation

GSO

  • BH GSO ISO 8968-4:2022 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)
  • GSO 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)

AR-IRAM

International Dairy Federation (IDF)

  • IDF 90-2008 Rennet caseins and caseinates - Determination of ash (Reference method)

RO-ASRO

  • STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method