The most common method for determining protein molecular weight is

The most common method for determining protein molecular weight is, Total:282 items.

The international standard classification for "The most common method for determining protein molecular weight is" includes: Fruits. Vegetables , food products in general , Animal feeding stuffs , Edible oils and fats. Oilseeds , Cereals, pulses and derived products , Biology. Botany. Zoology , Meat and meat products .

The Chinese standard classification for "The most common method for determining protein molecular weight is" includes: Other cash crops , Basic standards and general methods , Livestock and poultry feed and additive , Oil crop and product , Melon, fruit and vegetable planting and product , Cereal crop and forage crop in general , Food sanitation , Cereal crop and product , Basic standard and general method on forestry , Basic Subject in general , Meat processing and products .

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

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
GB/T 8856-1988 Method for determination of crude protein in fruit and vegetable products
GB/T 14771-1993 Method for determination of protein content in foods
GB/T 17811-1999 Determination of digestibility in animal protein feeds--Pepsin method
GB/T 15673-1995 Method for determination of crude protein in edible fungi
GB/T 26627.1-2011 Inspection of grain and oils—Determination of swelling index of glutenin(SIG) for wheat—Part 1:Macro-method

未注明发布机构

DIN ISO 5544 E:2020-06 Caseins - Determination of "fixed ash" (Reference method)
DIN ISO 5546 E:2020-08 Caseins and caseinates - Determination of pH (Reference method)
DIN ISO 5545 E:2020-06 Rennet caseins and caseinates - Determination of ash (Reference method)
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)
ASTM RR-D11-1141 2018 D8238-Test Method for Immunological Assay to Quantify Guayule Proteins.
DIN ISO 5550 E:2020-06 Caseins and caseinates - Determination of moisture content (Reference method)

Professional Standard - Agriculture

226药典三部-2015 Content Assay 3124 Recombinant Human Granulocyte Stimulating Factor Protein Assay General Rules 62
2330药典二部-2010 Appendix VII M Determination of protein content
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
220药典三部-2020 Content Determination Method 0731 Protein Content Determination Method
NY/T 3-1982 Method for determination of crude protein in cereals and beans seeds(Semi - Micro kjeldahl method)
206药典四部-2020 3100 Content Determination 3124 Recombinant Human Granulocyte Stimulating Factor Protein Content Determination
218药典四部-2015 3100 Content Determination 3124 Recombinant Human Granulocyte Stimulating Factor Protein Content Determination
201药典三部-2015 Content Determination Method 0731 General Principles of Protein Content Determination Method 50
194药典三部-2010 Appendix VI VIU Determination of Recombinant Human Granulocyte Stimulating Factor Protein Content
245药典三部-2020 Content Determination Method 3124 Human Granulocyte Stimulating Factor Protein Content Determination Method
92药典四部-2020 0700 Other Determination Methods 0731 Determination of Protein Content
111药典四部-2015 0700 Other Determination Methods 0731 Determination of Protein Content
GB 2905-1982 Method for determination of crude protein in cereals and beans seeds (Semi-micro kjeldahls method)

Group Standards of the People's Republic of China

T/ZJBX 10-2021 Determination of the proportion of protein hydrolysates with relative molecular weight less than 1000u in protein feed

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

国家市场监督管理总局、中国国家标准化管理委员会

GB/T 41366-2022 Livestock and poultry meat quality testing—Determination of moisture,protein and fat—Near-infrared spectroscopy method
GB/T 38163-2019 Determination of allergenic protein—LC-MS/MS method

Professional Standard - Commodity Inspection

SN/T 3926-2014 Determination of protein content in dairy foods,egg foods and soy foods for export - Coomassie brilliant blue method

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
JIS K 0602:1992 Methods for quantitative analysis of serum albumin
JIS K 0605:1992 Methods for quantitative analysis of trypsin
JIS K 0607:2000 Proteins -- Glucoseoxydase -- Methods for quantitative analysis
JIS K 0606:1993 Methods for quantitative analysis of transferrin
JIS K 0603:1992 Methods for quantitative analysis of immuno globulin
JIS K 0609:1996 Methods for quantitative analysis of immobilized trypsin

AT-ON

ONORM DIN 10454-1993 Determination of protein content of caseins and caseinates - Reference method
ONORM DIN 10453-1993 Determination of water content of caseins and caseinates - Reference method
ONORM DIN 10456-1993 Determination of pH of caseins and caseinates - Reference method

GOSTR

GOST 34551-2019 Сonfectionery. Method for determination of mass fraction of protein
GOST 34454-2018 Dairy products. Determination of protein content by the Kjeldahl method
GOST 13496.4-2019 Fodder, мixed fodder and raw mixed fodder. Methods of nitrogen and crude protein determination
GOST 34536-2019 Milk and milk products. Determination of mass fraction of whey proteins by Kjeldahl method

Korean Agency for Technology and Standards (KATS)

KS H 1204-2012 Testing method for crude proteins content
KS H 1204-2001 Testing method for crude proteins content
KS H ISO 5542:2006 Milk－Determination of protein content－Amido black dye-binding method(Rountine method)
KS H ISO 5549-2006(2016) Caseins and caseinates－Determination of protein content(Reference method)
KS H ISO 5549:2021 Caseins and caseinates — Determination of protein content(Reference method)
KS H ISO 5549:2006 Caseins and caseinates－Determination of protein content(Reference method)
KS H 1204-2021 Testing method for crude proteins content
KS J 4201-2008 Methods for quantitative analysis of serum albumin
KS J 4201-2023 Methods for quantitative analysis of serum albumin
KS J 4205-2008 Methods for quantitative analysis of immobilized trypsin
KS H ISO 5550-2021 Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5550-2007(2012) Caseins and caseinates－Determination of moisture content(Reference method)
KS J 4201-2018 Methods for quantitative analysis of serum albumin
KS H ISO 5543:2021 Caseins and caseinates — Determination of fat content — Gravimetric method(Reference method)
KS J 4202-2023 Methods for quantitative analysis of immunoglobulin
KS J 4202-2008 Methods for quantitative analysis of immunoglobulin
KS J 4202-2018 Methods for quantitative analysis of immunoglobulin
KS H ISO 5543:2006 Caseins and caseinates－Determination of fat content－Gravimetric method(Reference method)
KS J 4205-2018 Methods for quantitative analysis of immobilized trypsin
KS H ISO 5739:2006 Caseins and caseinates－Determination of scorched particles content
KS J 4205-2023 Methods for quantitative analysis of immobilized trypsin
KS H ISO 5543-2006(2016) Caseins and caseinates－Determination of fat content－Gravimetric method(Reference method)
KS H ISO 5550:2007 Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5546:2006 Caseins and caseinates－Determination of pH(Reference method)
KS H ISO 5548:2006 Caseins and caseinates－Determination of lactose content－Photometric method
KS H ISO 5548:2020 Caseins and caseinates－Determination of lactose content－Photometric method
KS H ISO 5550-2007(2021) Caseins and caseinates－Determination of moisture content(Reference method)
KS J 4203-2008 Methods for quantitative analysis of monoclonal IgG
KS H ISO 5542:2021 Milk — Determination of protein content — Amido black dye-binding method(Rountine method)

KR-KS

KS H 1204-2022 Testing method for crude proteins content
KS H ISO 5549-2021 Caseins and caseinates — Determination of protein content(Reference method)
KS H ISO 5543-2021 Caseins and caseinates — Determination of fat content — Gravimetric method(Reference method)
KS H ISO 5548-2020 Caseins and caseinates－Determination of lactose content－Photometric method

International Organization for Standardization (ISO)

ISO 5542:1984 Milk; Determination of protein content; Amido black dye-binding method (Routine method)
ISO 5549:1978 Caseins and caseinates; Determination of protein content (Reference method)
ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
ISO 8968-4:2016 | 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 5550:2006 | IDF 78:2006 Caseins and caseinates — Determination of moisture content (Reference method)
ISO 5543:1986 Caseins and caseinates; Determination of fat content; Gravimetric method (Reference method)
ISO 5543:2004 Caseins and caseinates - Determination of fat content - Gravimetric method (Reference method)
ISO 5543:2004|IDF 127:2004 Gravimetric method for determination of fat content in casein and caseinate (reference method)
ISO 8968-5:2001|IDF 20-5:2001 Determination of milk nitrogen content Part 5: Determination of protein nitrogen content
ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
ISO 5543:2004 | IDF 127:2004 Caseins and caseinates — Determination of fat content — Gravimetric method (Reference method)
ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
ISO 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
ISO 5550:2006|IDF 78:2006 Caseins and caseinates — Determination of moisture content (Reference method)
ISO 8968-5:2001 | IDF 20-5:2001 Milk — Determination of nitrogen content — Part 5: Determination of protein-nitrogen content
ISO 5739:2003|IDF 107:2003 Determination of casein and caseinate coke particles and foreign matter content
ISO 5548:2004 Caseins and caseinates - Determination of lactose content - Photometric method
ISO 5548:2004 | IDF 106:2004 Caseins and caseinates — Determination of lactose content — Photometric method
ISO 5548:2004|IDF 106:2004 Caseins and caseinates — Determination of lactose content — Photometric method
ISO 5550:1978 Caseins and caseinates; Determination of water content (Reference method)
ISO 5546:2010 | IDF 115:2010 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 8968-4:2001 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content
ISO 8968-4:2001|IDF 20-4:2001 Determination of milk nitrogen content Part 4: Determination of non-protein nitrogen content
ISO 5548:1980 Caseins and caseinates; Determination of lactose content; Photometric method
ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)

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
CSN 46 7092-27-1998 Testing methods for feeding stuffs - Part 27: Determination of the protein content
CSN 57 0111-3-2002 Testing methods for casein and caseinates - Determination of moisture
CSN 56 0186 Cast.12-1981 Testing methods for beer. art 12. etermination of proteins
CSN 57 0105 Cast.5-1984 Powdered and condensed milk products. Testing methods. Determination of protein content
CSN 57 0111 Cast.4-1979 Testing methods for asein. Determination f fat content
CSN 57 0111-12-2002 Testing methods for casein and caseinates - Determination of pH
CSN 57 0153-1986 Testing methods for meat products and sterilized food in preserves. Determination of protein content according to Kjeldahl
CSN 57 0111-7-2002 Testing methods for casein and caseinates - Determination of ash
CSN 57 0111-8-2002 Testing methods for casein and caseinates - Determination of titratable acidity
CSN 46 7092-4-1998 Testing methods for feeding stuffs - Part 4: Determination of crude protein content

SCC

UNE 34835:1985 MILK. DETERMINATION OF PROTEIN CONTENT. AMIDO BLACK DYE-BINDING METHOD. ROUTINE METHOD.
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-...
AENOR UNE 34400-7:1967 Test methods for wheat flour. Determination of protein.
BS 6248-10:1986 Caseins and caseinates-Method for determination of fat (gravimetric reference method)
UNE 34400-7:1967 TEST METHODS OF WHEAT FLOUR. PROTEIN DETERMINATION
DANSK DS/EN ISO 21572:2019 Foodstuffs – Molecular biomarker analysis – Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)
NS-EN ISO 21572:2019 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)
BS 4289-6:1986 Methods for the analysis of oilseeds-Determination of oil, moisture and volatile matter, and protein by infrared reflectance
DANSK DS/EN 15948:2020 Cereals – Determination of moisture and protein – Method using Near-Infrared Spectroscopy in whole kernels
DANSK DS/ISO 21572:2019 Foodstuffs – Molecular biomarker analysis – Protein-based methods
BS 6248-9:1984 Caseins and caseinates-Method for the determination of scorched particles
DIN 10470 E:2010 Draft Document - Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method

Standard Association of Australia （SAA）

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)

ES-AENOR

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

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)
UNE-EN ISO 21572:2020 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)
UNE-EN 15948:2021 Cereals - Determination of moisture and protein - Method using Near-Infrared Spectroscopy in whole kernels

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 ISO 5550:2020-12 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN EN ISO 21572:2020-02 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019); German version EN ISO 21572:2019
DIN 10470:2011 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
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 10464:1994-08 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus method
DIN ISO 5550:2020 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method) (ISO 8968-4:2016); German version EN ISO 8968-4:2016
DIN 10470:1999 Determination of whey protein content and casein content in total protein of milk and milk products - Derivative spectroscopic method
DIN 10472:1996 Determination of casein and whey protein contents of milk and milk products - Electrophoretic method
DIN EN ISO 21572:2020 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)
DIN EN ISO 21415-4:2007 Wheat and wheat flour - Gluten content - Part 4: Determination of dry gluten from wet gluten by a rapid drying method (ISO 21415-4:2006); German version EN ISO 21415-4:2007
DIN EN 15948:2020-12 Cereals - Determination of moisture and protein - Method using Near-Infrared Spectroscopy in whole kernels; German version EN 15948:2020
DIN EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001); German version EN ISO 8968-5:2001
DIN ISO 5544:2020-12 Caseins - Determination of "fixed ash" (Reference method) (ISO 5544:2008)
DIN 10470:2011-07 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN ISO 5545:2020-12 Rennet caseins and caseinates - Determination of ash (Reference method) (ISO 5545:2008)

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 EN ISO 21572:2019 Foodstuffs. Molecular biomarker analysis. Immunochemical methods for the detection and quantification of proteins
BS ISO 5543:2004 Caseins and caseinates - Determination of fat content - Gravimetric method (reference method)
BS EN ISO 8968-5:2002 Milk. Determination of nitrogen content. Determination of protein-nitrogen content
BS ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
BS ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method)
BS ISO 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
BS ISO 5544:2008 Caseins - Determination of "fixed ash" (Reference method)
BS ISO 5548:2004 Caseins and caseinates - Determination of lactose content - Photometric methods
BS ISO 17997-2:2005 Milk - Determination of casein-nitrogen content - Direct method
BS 6248-7:1982 Caseins and caseinates - Method for determination of protein content (reference method)
BS ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
BS EN ISO 8968-4:2002 Milk. Determination of nitrogen content. Determination of non-protein nitrogen content
BS 6248-11:1987 Caseins and caseinates. Method for determination of nitrate and nitrite contents
BS EN ISO 21572:2013 Foodstuffs. Molecular biomarker analysis. Protein-based methods
BS 1741 Sec.6.2:1990 Methods for chemical analysis of liquid milk and cream. Determination of casein nitrogen content of liquid milk. Routine method
BS EN 15948:2015 Cereals. Determination of moisture and protein. Method using Near-Infrared-Spectroscopy in whole kernels
BS EN ISO 21415-4:2007 Wheat and wheat flour - Gluten content - Determination of dry gluten from wet gluten by a rapid drying method
BS EN 15948:2012 Cereals. Determination of moisture and protein. Method using Near-Infrared- Spectroscopy in whole kernels

RU-GOST R

GOST R 51470-1999 Caseins and caseinates. Method for determination of protein content
GOST R 51466-1999 Caseins. Method for determination of "fixed ash" mass fraction
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 51464-1999 Caseins and caseinates. Method for determination of water content
GOST R 54478-2011 Grain. Methods of determination quantity and quality of gluten in wheat
GOST R 51463-1999 Rennet caseins and caseinates. Method for determination of ASH content
GOST 25179-2014 Milk and milk products. Method for determination of protein
GOST R 51454-1999 Caseins and caseinates. Method of determination of nitrate and nitrite contents
GOST R 54756-2011 Milk and milk products. Мethod for determination of mass portion of whey protein with Kjeldahl method
GOST 23327-1978 Milk. Methods for determination of the total protein content
GOST R 51467-1999 Caseins and caseinates. Method for determination of pH
GOST 25011-1981 Meat and meat products. Methods of protein determination
GOST R 54353-2011 Food common salt. Determination of sulphate-ion mass fraction by gravimetric method
GOST 23327-1998 Milk and milk products. Determination of mass part of total nitrogen by Kjeldahl method and determination of mass part of protein
GOST 25011-2017 Meat and meat products. Protein determination methods
GOST R 51469-1999 Caseins and caseinates. Photometric method for determination of lactose content
GOST R 52993-2008 Caseins and caseinates. Determination of moisture content (Reference method)
GOST 13496.4-1993 Fodder, mixed fodder and animal feed raw stuff. Methods of nitrogen and crude protein determination
GOST 13496.4-1984 Fodder, mixed fodder and animal feed raw stuff. Methods of nitrogen and crude protein determination
GOST R 54352-2011 Food common salt. Determination of a mass fraction of magnesium-ion and calcium-ion by complexonometric method
GOST R 53951-2010 Milk and milk-containing products. Determination of mass part of protein by Kjeldahl method
GOST 30648.2-1999 Infant milk products. Methods for determination of total protein
GOST 13979.3-1968 Oilcakes oil-meals. Methods of determination of soluble proteins
GOST R 54662-2011 Cheeses and processed cheeses. Determination of protein mass fraction by the Kjeldahl method
GOST 20264.2-1988 Enzyme preparations. Methods for determination of proteolytic activity

Association Francaise de Normalisation

NF V04-216:1985 Milk. Determination of protein content. Amido black dye-binding method (routine method).
NF V04-221-4*NF EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4 : determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
NF V04-216:2011 Milk - Determination of protein content - Amido black dye-binding method (routine method).
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 5550:2007 Caseins and caseinates - Determination of moisture content (reference method)
NF V04-387:1985 Caseins and caseinates. Determination of protein content (reference method).
NF EN ISO 21572:2019 Food products - Molecular biomarker analysis - Immunochemical methods for protein detection and quantification
NF V04-382:2008 Caseins and caseinates - Determination of fat content - Gravimetric method (Reference method).
NF V04-382:1988 Caseins and caseinates. Determination of fat content. Gravimetric method (reference method).
NF V03-750:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method.
NF V04-388*NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method.
NF ISO 5544:2008 Caseins - Determination of "fixed ashes" (Reference method)
NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method
NF ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
NF V04-221-5:2002 Milk - Determination of nitrogen content - Part 5 : determination of protein-nitrogen content.
NF V03-944:2021 Graines protéagineuses - Pois, fèves et féveroles - Détermination des impuretés
NF ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method)
NF V03-021:2013 Foodstuffs - Molecular biomarker analysis - Protein-based methods
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 V04-221-4:2002 Milk - Determination of nitrogen content - Part 4 : determination of non-protein nitrogen content.
NF V18-100:1977 Animal feeding stuffs.determination of nitrogen for the calcultion of crude protein content.
NF V04-384*NF ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method).

GSO

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)
BH GSO ISO 21572:2022 Foodstuffs — Molecular biomarker analysis — Immunochemical methods for the detection and quantification of proteins
GSO ISO 21572:2021 Foodstuffs — Molecular biomarker analysis — Immunochemical methods for the detection and quantification of proteins
GSO ISO 5550:2015 Caseins and caseinates -- Determination of moisture content (Reference method)
OS GSO ISO 5550:2015 Caseins and caseinates -- Determination of moisture content (Reference method)
BH GSO ISO 5543:2016 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
OS GSO ISO 5543:2015 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
GSO ISO 5543:2015 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
GSO ISO 8968-5:2014 Milk -- Determination of nitrogen content -- Part 5: Determination of protein-nitrogen content
GSO ISO 5544:2015 Caseins -- Determination of " fixed ash " (Reference method)
OS GSO ISO 8968-5:2014 Milk -- Determination of nitrogen content -- Part 5: Determination of protein-nitrogen content
OS GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method
GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method

VN-TCVN

TCVN 7774-2007 Milk.Determination of protein content.Amido black dye-binding method (Routine method)
TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content
TCVN 7871-3-2008 Wheat and wheat flour.Gluten content.Part 3: Determination of dry gluten from wet gluten by an oven drying method
TCVN 7871-4-2008 Wheat and wheat ftour.Gluten content.Part 4: Determination of dry gluten from wet gluten by a rapid drying method

CEN - European Committee for Standardization

EN ISO 8968-4:2001 Milk - Determination of Nitrogen Content - Part 4: Determination of Non-Protein Nitrogen Content

RO-ASRO

STAS 2213/17-1976 SWEETS Determination of total proteinic content and milk proteinic substance content
STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method
SR ISO 5549:1996 Caseins and caseinates - Determination of protein content (Reference method)
STAS 6514-1975 FISH AND FISH PRODUCTS Determination of total proteic matters

Lithuanian Standards Office

LST ISO 5549:2001 Caseins and caseinates. Determination of protein content (Reference method) (identical ISO 5549:1978)
LST ISO 5543:2004 Caseins and caseinates. Determination of fat content. Gravimetric method (Reference method) (idt ISO 5543:2004)

International Dairy Federation (IDF)

IDF 78-2006 Caseins and caseinates. Determination of moisture content (Reference method)
IDF 90-2008 Rennet caseins and caseinates - Determination of ash (Reference method)
IDF 20-5-2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
IDF 89-2008 Caseins - Determination of "fixed ash" (Reference method)
IDF 20-4-2001 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content
IDF 107-2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter

IN-BIS

IS 7481-1974 How to measure protein efficiency ratio (PER)
IS 11963-1987 Photometric method for determination of lactose content in casein and caseinate
IS 7219-1973 Methods for determination of protein in food and feed
IS 2006-1988 Methods for the quantitative chemical analysis of binary mixtures of protein fibers and certain other non-protein fibers
IS 11888-1987 Method for determination of charred particle content in casein and caseinates
IS 11962-1987 Method for determination of ash content in chymosin casein and caseinate (reference method)

European Committee for Standardization (CEN)

EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
EN ISO 21572:2013 Foodstuffs - Molecular biomarker analysis - Protein-based methods
EN ISO 21572:2019 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)
EN 15948:2015 Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels

AENOR

UNE 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).
UNE 34871:1986 PROCESSED CHEESE PRODUCTS. DETERMINATION OF THE PROTEIN CONTENT.

PT-IPQ

NP 1986-1991 Milks Determination of protein content. Kjeldahl technique

NL-NEN

NEN 3145-1966 Feeding stuffs. Methodsof analysis. Determination of crude protein

Danish Standards Foundation

DS/EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
DS/EN ISO 21572:2013 Foodstuffs - Molecular biomarker analysis - Protein-based methods
DS/ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
DS 2253:1983 Water quality. Determination of aerobic proteclytic bacteria at 30 centigrades

PL-PKN

PN C04288-14-1987 Technical fats Methods of testing Determination of protein content

AR-IRAM

IRAM 15 707-1963 How to measure plant protein in food

ZA-SANS

SANS 8968-5:2006 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
SANS 8968-4:2006 Milk - Determination of nitrogen content Part 4: Determination of non-protein-nitrogen content

CH-SNV

SN 210 100-1987 Technical drawings - Sizes and layout of drawing sheets

Others: