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Database: 365,228(8 Aug 2026)

protein impurities

protein impurities, Total:126 items.

The international standard classification for "protein impurities" includes: Biology. Botany. Zoology , food products in general , Man-made fibres , Animal feeding stuffs , Edible oils and fats. Oilseeds , Fruits. Vegetables .

The Chinese standard classification for "protein impurities" includes: Environmental Condition and General Test Method , Basic standard and general method on forestry , Cereal crop and product , Food sanitation , Chemical fibre , Chemical fibre in general , Livestock and poultry feed and additive , Oil crop and product , Basic standards and general methods , Other cash crops , Food processing and products in general , Fire-fighting equipment and devices .


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

  • GB/T 35809-2018 Method for analysis of forestry biomass—Determination of protein content
  • GB/T 34800-2017 Detection method of activity and impurity of proteinase K

Professional Standard - Agriculture

Professional Standard - Textile

Group Standards of the People's Republic of China

国家市场监督管理总局、中国国家标准化管理委员会

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

  • GB/T 5009.5-2003 Determination of protein in foods
  • 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 5511-1985 Inspection of grain and oilseeds--Methods for determination of crude protein
  • GB/T 15673-1995 Method for determination of crude protein in edible fungi
  • GB/T 17811-2008 Determination of pepsin digestibility in animal protein feeds - Filtration method
  • GB/T 14489.2-1993 Method for determination of crude protein in oilseed

Hebei Provincial Standard of the People's Republic of China

  • DB13/T 221-1994 Method for testing the purity of corn hybrids, inbred lines, and wheat seeds - protein electrophoresis
  • DB13/T 1098-2009 Determination of protein in feed
  • DB13/T 1408-2011 High-quality protein corn cultivation technical regulations

Professional Standard - Public Safety Standards

  • GA/T 52-1993 Quality grading for protein-foam fire extinguishing agent and fluoroprotein-foam fire extinguishing agent

Taiwan Provincial Standard of the People's Republic of China

  • CNS 5035-1986 Method of Test for Crude Protein in Food
  • CNS 3449-2007 Method of test for milk and milk products - Determination of protein
  • CNS 2770.5-1986 Method of Test for Feeds : Determination of Crude Protein
  • CNS 3449-1988 Methods of Test for Milk and Milk Products: The Quantitive Analysis of Protein
  • CNS 2770-5-1986 Method of Test for Feeds : Determination of Crude Protein

农业农村部

  • NY/T 3493-2019 Agricultural biomass raw materials. Determination of crude protein

工业和信息化部/国家能源局

Professional Standard - Medicine

Professional Standard - Commodity Inspection

  • SN/T 0803.9-1999 Oil bearing materials for import and export—Method for the determination of crude protein

Association Francaise de Normalisation

  • NF V03-944:2021 Graines protéagineuses - Pois, fèves et féveroles - Détermination des impuretés
  • 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 V04-387:1985 Caseins and caseinates. Determination of protein content (reference method).
  • NF V04-221-4*NF EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4 : determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)

RO-ASRO

Spanish Association for Standardization (UNE)

  • UNE 64102:1977 MIXED FEEDS AND RAW MATERIALS. TOTAL PROTEIN (RAW PROTEIN)
  • UNE-EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method) (ISO 8968-4:2016)
  • UNE 34-871-1986 Processed cheese. Determination of protein content
  • UNE 34081:1975 ANALYSIS METHODS FOR CHOCOLATES. MILK PROTEINS.

Japanese Industrial Standards Committee (JISC)

  • JIS K 0602:2000 Proteins -- Serum albumin -- Methods for quantitative analysis
  • JIS K 0605:2000 Proteins -- Trypsin -- Methods for quantitative analysis
  • JIS K 0606:2000 Proteins -- Transferrin -- Methods for quantitative analysis
  • JIS K 0603:2000 Proteins -- Immunoglobulin -- Methods for quantitative analysis
  • JIS K 0604:2000 Proteins -- Monoclonal IgG -- Methods for quantitative analysis

Society of Automotive Engineers (SAE)

CZ-CSN

  • CSN 57 0111-5-2002 Testing methods for casein and caseinates - Determination of protein content
  • CSN 570111-5-2002 Testing methods for casein and caseinates - Determination of protein content

Korean Agency for Technology and Standards (KATS)

International Organization for Standardization (ISO)

  • ISO 5549:1978 Caseins and caseinates; Determination of protein content (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 20483:2006 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
  • ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
  • ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
  • ISO 5739:2003|IDF 107:2003 Determination of casein and caseinate coke particles and foreign matter content

RU-GOST R

  • GOST R 53011-2008 Mixed feeds, protein-vitamin-mineral concentrates, premixes. Methods for determination of metallomagnetic impurity
  • GOST R 57476-2017 Bird food protein. Specifications
  • GOST 31484-2012 Mixed feeds, protein-vitamin-mineral concentrates, premixes. Methods for determination of metallomagnetic impurity
  • GOST 25179-1990 Milk. Methods for determination of protein
  • GOST 10846-1991 Grain and products of its processing. Method for determination of protein
  • GOST R 57475-2017 Dried egg protein after extraction lysozyme. Specifications
  • GOST 25011-1981 Meat and meat products. Methods of protein determination
  • GOST 25179-2014 Milk and milk products. Method for determination of protein

KR-KS

IN-BIS

  • IS 7482-1989 Protein Drinks—Specifications
  • IS 9095-1979 Specifications for protein gummies
  • IS 1167-1965 Casein specifications (food quality)
  • IS 8665-1977 Specification for protein fortified bread
  • IS 13650-1993 Glass containers for proteinized food
  • IS 7487-1986 Specifications for protein-rich cookies
  • IS 6557-1972 Protein Flakes Specifications Not Food Quality
  • IS 9038-1979 Specification for Renewable Protein Beverages and Food Products
  • IS 7481-1974 How to measure protein efficiency ratio (PER)
  • IS 2006-1988 Methods for the quantitative chemical analysis of binary mixtures of protein fibers and certain other non-protein fibers

HU-MSZT

AT-ON

  • ONORM DIN 10454-1993 Determination of protein content of caseins and caseinates - Reference method

GSO

  • GSO 2101:2010 Protein-Rich concentrated Nutrient Supplementary foods
  • 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)
  • 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)

German Institute for Standardization

  • DIN 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic method
  • DIN 10464:1994 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus method
  • 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 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 10470:2011 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
  • DIN 10470:1999 Determination of whey protein content and casein content in total protein of milk and milk products - Derivative spectroscopic method

Lithuanian Standards Office

  • LST ISO 5549:2001 Caseins and caseinates. Determination of protein content (Reference method) (identical ISO 5549:1978)

Standard Association of Australia (SAA)

  • AS 1871.9:1976 List of methods for examination of waters Nitrogen (albuminoid)
  • 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)
  • AS K89:1953 Protein adhesives for plywood

British Standards Institution (BSI)

  • BS EN ISO 8968-4:2016 Milk and milk products. Determination of nitrogen content. Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
  • BS EN 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 ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter

CU-NC

SCC

  • 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)
  • 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)
  • 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)
  • DIN EN ISO 8968-4 E:2013 Draft Document - 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/DIS 8968-4:2013); German version prEN ISO 8968-...

GOSTR

  • GOST 34551-2019 Сonfectionery. Method for determination of mass fraction of protein
  • GOST 34621-2019 Foods for special dietary uses. Dry protein, protein-carbohydrate and carbohydrate-protein drinks for sports nutrition. General specifications

ZA-SANS

  • CKS 458-2008 Protein, vitamin, mineral (PVM) supplementary food mixture

BELST

  • STB 1150-2013 Protein-vitamin-mineral additives. General specifications

Danish Standards Foundation

  • DS 2253:1983 Water quality. Determination of aerobic proteclytic bacteria at 30 centigrades
  • DS/ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter

International Dairy Federation (IDF)

  • IDF 107-2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter

VN-TCVN

  • TCVN 5461-1991 Synthetic detergents.Determination of proteinous activity