Chromatography for protein content

Chromatography for protein content, Total:216 items.

The international standard classification for "Chromatography for protein content" includes: Man-made fibres , Biology. Botany. Zoology , Animal feeding stuffs , Fruits. Vegetables , Textiles in general , food products in general , Cereals, pulses and derived products .

The Chinese standard classification for "Chromatography for protein content" includes: Chemical fibre in general , Basic Subject in general , Livestock and poultry feed and additive , Other cash crops , Basic standards and general methods , Basic standard and general method on forestry , Silk and silk fabric in general , Food processing and products in general , Cereal crop and forage crop in general .

Group Standards of the People's Republic of China

T/HBIQA 0005-2024 Determination of five rapamycin target protein inhibitors in human blood by high performance liquid chromatography-tandem mass spectrometry
T/TDSTIA 026-2022 Determination of α-lactalbumin and β-lactoglobulin in infant formula milk powder—Gel permeation chromatography
T/CCAA 70-2023 Determination of lactoferrin in bovine infant formula by liquid chromatography tandem mass spectrometry
T/CAB 0062-2020 Identification of type Ⅲ collagen LC-MS/MS method
T/BPCT 001-2023 Determination of A2 β-casein content in cow milk and cow milk products by high performance liquid chromatography-mass spectrometry
T/CSTM 00995-2024 Human whole blood — Content of glycosylated hemoglobin HbA1C — Matrix-assisted laser desorption ionization–time of flight mass spectrometry
T/GXAS 357-2022 Rapid screening of protein content in fresh wet rice noodles by near infrared spectroscopy
T/SHNX 001-2025 Determination of lactoferrin, α-lactalbumin and β-lactoglobulin in raw bovine milk by liquid chromatography-tandem mass spectrometry
T/CSIQ 77001-2020 Determination of α-Lactalbumin contents in dairy products— HPLC method
T/CAAMM 314-2023 Procedure for rapid grading detection of protein content in fresh edible sweet potatoes using near-infrared spectroscopy
T/CAIA SHO22-2024 Human whole blood — Content of glycosylated hemoglobin HbA1C — Matrix-assisted laser desorption ionization–time of flight mass spectrometry

Professional Standard - Textile

FZ/T 50018-2013 Determination of the protein content of the protein viscose fiber

Professional Standard - Agriculture

SN/T 5094-2018 Determination of Fipronil and its metabolite residues in eggs and egg products for export - LC-MS/MS Method
SN/T 5095-2018 Determination of fipronil and its metabolite residues in eggs and egg products for export by gas chromatography-mass spectrometry and gas chromatography-mass spectrometry/mass spectrometry
651药典第一增补本-2010 Part Two Revised Appendix Appendix VII M Determination of Protein Content
201药典三部-2015 Content Determination Method 0731 General Principles of Protein Content Determination Method 50
NY/T 4630-2025 Determination of α-lactalbumin and β-lactoglobulin in milk and dairy products by high performance liquid chromatography
220药典三部-2020 Content Determination Method 0731 Protein Content Determination Method
206药典四部-2020 3100 Content Determination 3124 Recombinant Human Granulocyte Stimulating Factor Protein Content Determination
111药典四部-2015 0700 Other Determination Methods 0731 Determination of Protein Content
SN/T 5071-2018 Determination of 19 kinds of nonprotein nitrogen compounds infoodstuffs of origin for export - LC-MS/MS method
2330药典二部-2010 Appendix VII M Determination of protein content
245药典三部-2020 Content Determination Method 3124 Human Granulocyte Stimulating Factor Protein Content Determination Method
218药典四部-2015 3100 Content Determination 3124 Recombinant Human Granulocyte Stimulating Factor Protein Content Determination
92药典四部-2020 0700 Other Determination Methods 0731 Determination of Protein Content

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

GB/T 22260-2023 Determination of anabolic steroids in feeds—Liquid chromatography-tandem mass spectrometry
GB/T 24901-2010 Inspection of grain and oils—Determination of crude protein in maize—Near-infrared method
GB/T 24897-2010 Inspection of grain and oils—Crude protein determination in rice—Near-infrared method
GB/T 15673-1995 Method for determination of crude protein in edible fungi
GB/T 35809-2018 Method for analysis of forestry biomass—Determination of protein content
GB/T 24899-2010 Inspection of grain and oils—Determination of crude protein in wheat—Near-infrared method
GB/T 44214-2024 Test method for non-protein content in silk
GB/T 5511-2008 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
GB/T 42699.1-2023 Textiles—Qualitative and quantitative proteomic analysis of some animal hair fibres—Part 1:Peptide detection using LC-ESI-MS with protein reduction
GB/T 38163-2019 Determination of allergenic protein—LC-MS/MS method

Professional Standard - Medicine

YY/T 1805.3-2022 Tissue engineering medical device products—Collagen protein—Part 3:Quantification of collagen based on marker peptide detection—Liquid chromatography-mass spectrometry

Jilin Provincial Standard of the People's Republic of China

DB22/T 3646-2024 Identification of Changbai Mountain forest frog oil High-performance liquid chromatography protein characteristic mapping method

Agricultural Standard of the People's Republic of China

农业部783号公告-6-2006 Determination of iodinated casein in feeds.Liquid chromatography/Mass spectrometry
农业部1068号公告-3-2008 Determination of ten kinds of anabolic androgenic steroids in feeds.High performance liquid chromatography tandem mass spectrometry

Taiwan Provincial Standard of the People's Republic of China

CNS 6511-2008 Method of test for meat and meat products - Determination of crude protein content

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

German Institute for Standardization

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
DIN 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic method
DIN 10470:2011-07 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN 10454:1983-03 Determination of protein content of caseins and caseinates; reference method
DIN 10470 E:2010 Draft Document - Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN 10470 E:2010-05 Draft Document - Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic 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 10466:2001-09 Determination of whey protein content in total protein of milk and milk products - Polarographic 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 10464:1994 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus method
DIN 10470:1999-07 Determining of whey protein content and casein content in total protein of milk and milk products by derivative spectroscopy
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 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-...
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 10473:1997-12 Determination of acid soluble <beta>-lactoglobulin content of heat-treated milk - Reversed phase, high performance liquid chromatographic method
DIN EN ISO 21415-2:2008 Wheat and wheat flour - Gluten content - Part 2: Determination of wet gluten by mechanical means (ISO 21415-2:2006); English version of DIN EN ISO 21415-2:2008-04
DIN EN 14663:2006 Foodstuffs - Determination of vitamin B6 (including its glycosylated forms) by HPLC; English version of DIN EN 14663:2006-03
DIN ISO 5550 E:2020-06 Caseins and caseinates - Determination of moisture content (Reference method)
DIN ISO 5550:2020-12 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN 10453:1983-03 Determination of water content of caseins and caseinates; reference method

Czech Standards Institute (UNMZ)

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 56 0512-12-1995 Methods of milled produets analysis - Part 12: Determination of protein content
CSN 57 0105 Cast.5-1984 Powdered and condensed milk products. Testing methods. Determination of protein content

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 5542:1984 Milk; Determination of protein content; Amido black dye-binding method (Routine 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 13875:2005 | IDF 178:2005 Liquid milk — Determination of acid-soluble beta-lactoglobulin content — Reverse-phase HPLC 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 5543:2004 | IDF 127:2004 Caseins and caseinates — Determination of fat content — Gravimetric method (Reference method)
ISO 5550:2006|IDF 78:2006 Caseins and caseinates — Determination of moisture content (Reference method)
ISO 5739:2003|IDF 107:2003 Determination of casein and caseinate coke particles and foreign matter content
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 5548:2004 Caseins and caseinates - Determination of lactose content - Photometric method
ISO 13875:2005 Liquid milk - Determination of acid-soluble -lactoglobulin content - Reverse-phase HPLC method
ISO 5550:1978 Caseins and caseinates; Determination of water content (Reference method)
ISO 8195:1987 Caseins and caseinates; Determination of nitrate and nitrite contents; Method by cadmium reduction and spectrometry
ISO 13875:2005|IDF 178:2005 Determination of acid-soluble β-lactoglobulin content in liquid milk by reversed-phase high performance liquid chromatography
ISO 5550:2006 | IDF 78:2006 Caseins and caseinates — Determination of moisture content (Reference method)
ISO 5548:1980 Caseins and caseinates; Determination of lactose content; Photometric method
ISO 5543:1986 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 5543:2004 Caseins and caseinates - Determination of fat content - Gravimetric method (Reference method)
ISO 21415-2:2006 Wheat and wheat flour - Gluten content - Part 2: Determination of wet gluten by mechanical means

Korean Agency for Technology and Standards (KATS)

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 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 1204-2012 Testing method for crude proteins content
KS H 1204-2001 Testing method for crude proteins content
KS H 1204-2022 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 1204-2021 Testing method for crude proteins content
KS H ISO 8195-2006 Caseins and caseinates－Determination of nitrate and nitrite contents－Method by cadmium reduction and spectrometry
KS H ISO 5739:2006 Caseins and caseinates－Determination of scorched particles content
KS H ISO 5543-2006(2016) Caseins and caseinates－Determination of fat content－Gravimetric method(Reference method)
KS J 4201-2018 Methods for quantitative analysis of serum albumin
KS H ISO 5550:2007 Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5548:2020 Caseins and caseinates－Determination of lactose content－Photometric method
KS H ISO 5550-2007(2012) Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5548:2006 Caseins and caseinates－Determination of lactose content－Photometric 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
KS H ISO 5550-2021 Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5543-2021 Caseins and caseinates — Determination of fat content — Gravimetric method(Reference method)
KS H ISO 5543:2006 Caseins and caseinates－Determination of fat content－Gravimetric method(Reference method)
KS H ISO 5542:2021 Milk — Determination of protein content — Amido black dye-binding method(Rountine method)

Ente Nazionale Italiano di Unificazione

UNI 22620:2022 Oleaginous seeds and fruits and derivatives - Vegetable protein substances- Determination of the tryptophan amino acid content by ion exchange chromatography.
EC 1-2023 UNI 22620:2022 Oleaginous seeds and fruits and derivatives - Vegetable protein substances- Determination of the tryptophan amino acid content by ion exchange chromatography.
UNI 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)
UNI 22620:2001 Seed and vegetable oils and derived products - Vegetable proteins - Determination of tryptophan content by ion exchange chromatography
UNI 22630:2000 Seed and vegetable oils and derived products - Vegetable proteins - Determination of tryptophan aminoacid content by high performance liquid chromatography (HPLC)
UNI EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Determination of protein- nitrogen content
UNI ISO 5543:2018 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
UNI EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Determination of non-protein nitrogen content
UNI 10538:1995 Calf rennet and adult bovine rennet. Dtermination of chymosin and bovine pepsine contents. Cromatographic method.
UNI 22621:2001 Seed and vegetable oils and derived products - Vegetable proteins - Determination of sulphur aminoacids content by ion exchange chromatography

Gosstandart of Russia

GOST 10846-1991 Grain and products of its processing. Method for determination of protein
GOST R 51470-1999 Caseins and caseinates. Method for determination of protein content
GOST R 71208-2024 Grain. Determination of moisture, protein, and gluten by near-infrared spectroscopy
GOST ISO 8968-4-2021 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)..
GOST 34454-2018 Dairy products. Determination of protein content by the Kjeldahl method
GOST R 51464-1999 Caseins and caseinates. Method for determination of water content
GOST R 51454-1999 Caseins and caseinates. Method of determination of nitrate and nitrite contents
GOST 13496.4-1993 Fodder, mixed fodder and animal feed raw stuff. Methods of nitrogen and crude protein determination
GOST 13496.4-2019 Fodder, мixed fodder and raw mixed fodder. 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 52993-2008 Caseins and caseinates. Determination of moisture content (Reference method)
GOST ISO 5550-2017 Caseins and caseinates. Determination of moisture content (Reference method)
GOST ISO 27105-2019 Milk and Cheese. Determination of Lysozyme Content Obtained from Chicken Egg White by High Performance Liquid Chromatography
GOST R 51469-1999 Caseins and caseinates. Photometric method for determination of lactose content
GOST ISO 20483-2022 Cereals and Legumes. Determination of Nitrogen Content and Calculation of Total Protein Content. Kjeldahl Method
GOST 23327-1978 Milk. Methods for determination of the total protein content

Bureau of Indian Standards

IS 18836-2024 Milk and Milk Products - Determination of Nitrogen Content - Determination of Protein and Non-Protein Nitrogen Content and True Protein Content Calculation (Reference Method)
IS 11888-2005 Casiens And Caseinated - Determination Of Contents Of Scorched Particles And Of Extraneous Matter
IS 11963-2005 Caeins and Caseinates - Determination of Lactose Content - Photometric Method
IS 11920-2012 Cassein and Caseinates -Determination of Moisture Content (Reference Method)

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
BS ISO 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
BS EN ISO 8968-5:2002 Milk. Determination of nitrogen content. Determination of protein-nitrogen content
BS ISO 13875:2005 Liquid milk - Determination of acid-soluble -lactoglobulin content - Reverse-phase HPLC method
BS ISO 5548:2004 Caseins and caseinates - Determination of lactose content - Photometric methods
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 ISO 5543:2004 Caseins and caseinates - Determination of fat content - Gravimetric method (reference method)
BS EN ISO 21415-1:2007 Wheat and wheat flour - Gluten content - Determination of wet gluten by a manual method
BS EN ISO 8968-4:2002 Milk. Determination of nitrogen content. Determination of non-protein nitrogen content
BS EN ISO 21415-3:2007 Wheat and wheat flour - Gluten content - Determination of dry gluten from wet gluten by an oven drying method

Kingdom of Bahrain Testing and Metrology Directorate

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 13875:2016 Liquid milk -- Determination of acid-soluble beta-lactoglobulin content -- Reverse-phase HPLC method
BH GSO ISO 5543:2016 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)

GCC Standardization Organization

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)
GSO ISO 13875:2014 Liquid milk -- Determination of acid-soluble beta-lactoglobulin content -- Reverse-phase HPLC method
GSO ISO 5543:2015 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
GSO ISO 5550:2015 Caseins and caseinates -- Determination of moisture content (Reference method)
GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method
GSO 2101:2010 Protein-Rich concentrated Nutrient Supplementary foods

Austrian Standards

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

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)

Association Francaise de Normalisation

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)
NF EN 15948:2020 Cereals - Determination of water and protein content - Method using near-infrared spectroscopy on whole grains
NF V03-032:2024 Foodstuffs - Determination of the nitrogen content by the Kjeldahl method and calculation of the protein content
NF V04-382:1988 Caseins and caseinates. Determination of fat content. Gravimetric method (reference method).
NF V04-388*NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method.
NF V04-382:2008 Caseins and caseinates - Determination of fat content - Gravimetric method (Reference method).
NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method
NF ISO 5550:2007 Caseins and caseinates - Determination of moisture content (reference method)
NF V04-390:1988 Caseins and caseinates. Determination of nitrate and nitrite contents. Method by cadmium reduction and spectrometry.

Spanish Association for Standardization (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 15948:2015 Determination of moisture and protein content in cereals by near infrared spectroscopy
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)
UNE 34-871-1986 Processed cheese. Determination of protein content
UNE 34871:1986 PROCESSED CHEESE PRODUCTS. DETERMINATION OF THE PROTEIN CONTENT.

Danish Standards Foundation

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)
DANSK DS/ISO 13875:2007 Liquid milk - Determination of acid-soluble beta-lactoglobulin content - Reverse-phase HPLC-method
DS/ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter

National Standardisation Body (ASRO)

STAS 2213/17-1976 SWEETS Determination of total proteinic content and milk proteinic substance content
STAS 21/6-1973 OILSEED RESIDUES Determination of protein of protein brut content
STAS 6356-1976 MILK AND MILK PRODUCTS Proteic substances determinat ion

Lithuanian Standards Office

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

Clinical and Laboratory Standards Institute

CLSI C64-2021 Quantitative Measurement of Proteins and Peptides by Mass Spectrometry

COMMISSION FOR THE STANDARDS, METROLOGY AND QUALITY OF VIETNAM (STAMEQ)

TCVN 8766-2011 Milk and milk products.Determination of protein content.Acid orange 12 dye-binding method
TCVN 7774-2007 Milk.Determination of protein content.Amido black dye-binding method (Routine method)
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 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content
TCVN 7871-4-2008 Wheat and wheat ftour.Gluten content.Part 4: Determination of dry gluten from wet gluten by a rapid drying method

Standards Norway

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)

European Committee for Standardization (CEN)

EN ISO 8968-4:2001 Milk - Determination of Nitrogen Content - Part 4: Determination of Non-Protein Nitrogen Content
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 21415-2:2008 Wheat and wheat flour - Gluten content - Part 2: Determination of wet gluten by mechanical means

Swedish Institute for Standards

SS-EN ISO 8968-4:2017 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) (ISO 8968-4:2016)
SS-EN 15948:2020 Cereals - Determination of moisture and protein - Method using Near-Infrared Spectroscopy in whole kernels

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

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO 13875:2014 Liquid milk -- Determination of acid-soluble beta-lactoglobulin content -- Reverse-phase HPLC method
OS GSO ISO 5543:2015 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
OS GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method
OS GSO ISO 5550:2015 Caseins and caseinates -- Determination of moisture content (Reference method)

Magyar Szabványügyi Testület

MSZ 05 26.1510-1983 Protein content 40-150
MNOSZ 17619-1954 Definition of the concept of protein content in preserved foods

Polski Komitet Normalizacyjny (PKN)

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

International Dairy Federation (IDF)

IDF 78-2006 Caseins and caseinates. Determination of moisture content (Reference method)
IDF 107-2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
IDF/RM 216-2009 Milk and milk products - Determination of hen's egg white lysozyme by HPLC

Others: Chromatography for protein content