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ISO 8968-1:2014

ISO 8968-1:2014

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Current

The latest, up-to-date edition.

Milk and milk products — Determination of nitrogen content — Part 1: Kjeldahl principle and crude protein calculation

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Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French, Russian

Published date

03-02-2014

Publisher

International Organization for Standardization

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Hardcopy - English
PDF - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
Hardcopy - French
PDF - French
PDF 3 Users - French
PDF 5 Users - French
PDF 9 Users - French
Hardcopy - Russian
PDF - Russian
PDF 3 Users - Russian
PDF 5 Users - Russian
PDF 9 Users - Russian
Hardcopy - English
PDF - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
Hardcopy - French
PDF - French
PDF 3 Users - French
PDF 5 Users - French
PDF 9 Users - French
Hardcopy - Russian
PDF - Russian
PDF 3 Users - Russian
PDF 5 Users - Russian
PDF 9 Users - Russian
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ISO 8968-1|IDF 20-1:2014 specifies a method for the determination of the nitrogen content and crude protein calculation of milk and milk products by the Kjeldahl principle, using traditional and block digestion methods. The methods are applicable to: liquid cow's (whole, partially skimmed or skimmed milk), goat's and sheep's whole milk; hard, semi-hard and processed cheese; dried milk and dried milk products (including milk-based infant formulae, milk protein concentrate, whey protein concentrate, casein and caseinate). The methods are not applicable to samples containing ammonium caseinate.

DevelopmentNote
Also numbered as IDF 20-1. (02/2002) Supersedes ISO/FDIS 8968-1, ISO 5549, ISO 8968-2 & ISO TS 17837. (02/2014)
DocumentType
Standard
Pages
18
PublisherName
International Organization for Standardization
Status
Current
Supersedes

BS ISO 8968-3 : 2004 AMD 17262 MILK - DETERMINATION OF NITROGEN CONTENT - PART 3: BLOCK-DIGESTION METHOD (SEMI-MICRO RAPID ROUTINE METHOD)
BS ISO 17997-1:2004 Milk. Determination of casein-nitrogen content Indirect method (Reference method)
02/704627 DC : DRAFT APR 2002 ISO/DIS 13875 (IDF 178) - HEAT-TREATED MILK - DETERMINATION OF ACID-SOLUBLE BETA-LACTOGLOBULIN CONTENT - REVERSE-PHASE HPLC METHOD
BS ISO 27871:2011 Cheese and processed cheese. Determination of the nitrogenous fractions
DIN EN ISO 8968-2:2002-06 MILK - DETERMINATION OF NITROGEN CONTENT - PART 2: BLOCK-DIGESTION METHOD (MACRO 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)
I.S. EN ISO 8968-2:2002 MILK - DETERMINATION OF NITROGEN CONTENT - PART 2: BLOCK-DIGESTION METHOD (MACRO METHOD)
07/30142476 DC : 0 BS ISO 1871 - FOOD PRODUCTS - GENERAL GUIDELINES FOR THE DETERMINATION OF NITROGEN BY KJEDAHL METHOD
ISO 18329:2004 Milk and milk products — Determination of furosine content — Ion-pair reverse-phase high-performance liquid chromatography method
UNI ISO 9622 : 2014 MILK AND LIQUID MILK PRODUCTS - GUIDELINES FOR THE APPLICATION OF MID-INFRARED SPECTROMETRY
I.S. 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/DIS 8968-4:2013)
DIN EN ISO 8968-3:2007-09 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method) (ISO 8968-3:2004)
BS ISO 1871:2009 Food and feed products. General guidelines for determination of nitrogen by Kjeldahl method
03/301010 DC : DRAFT FEB 2003 ISO 18329 - MILK AND MILK PRODUCTS - DETERMINATION OF FUROSINE CONTENT - ION-PAIR REVERSE-PHASE HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY METHOD
I.S. EN ISO 8968-5:2002 MILK - DETERMINATION OF NITROGEN CONTENT - PART 5: DETERMINATION OF PROTEIN-NITROGEN CONTENT
BS ISO 15323:2002 Dried milk protein products. Determination of nitrogen solubility index
BS ISO 13875:2005 Liquid milk. Determination of acid-soluble β-lactoglobulin content. Reverse-phase HPLC method
BS ISO 21543:2006 Milk products. Guidelines for the application of near infrared spectrometry
ISO 13875:2005 Liquid milk Determination of acid-soluble beta-lactoglobulin content Reverse-phase HPLC method
ISO 17997-2:2004 Milk — Determination of casein-nitrogen content — Part 2: Direct method
ISO 9622:2013 Milk and liquid milk products Guidelines for the application of mid-infrared spectrometry
ISO 15323:2002 Dried milk protein products — Determination of nitrogen solubility index
12/30246963 DC : 0 BS ISO 9622 - MILK AND LIQUID MILK PRODUCTS - GUIDANCE ON THE APPLICATION OF MID-INFRARED SPECTROMETRY
BS ISO 9622:2013 Milk and liquid milk products. Guidelines for the application of mid-infrared spectrometry
ISO 21543:2006 Milk products Guidelines for the application of near infrared spectrometry
ISO 17997-1:2004 Milk — Determination of casein-nitrogen content — Part 1: Indirect method (Reference method)
ISO 8968-3:2004 Milk — Determination of nitrogen content — Part 3: Block-digestion method (Semi-micro rapid routine method)
BS EN ISO 14891:2002 Milk and milk products. Determination of nitrogen content. Routine method using combustion according to the Dumas principle
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 14891:2002 Milk and milk products — Determination of nitrogen content — Routine method using combustion according to the Dumas principle
BS EN ISO 8968-3:2007 Milk. Determination of nitrogen content Block-digestion method (Semi-micro rapid routine method)
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)
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)
EN ISO 8968-2:2001 Milk - Determination of nitrogen content - Part 2: Block-digestion method (Macro method) (ISO 8968-2:2001)
EN ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
EN ISO 14891:2002 Milk and milk products - Determination of nitrogen content - Routine method using combustion according to the Dumas principle (ISO 14891:2002)
EN ISO 8968-3:2007 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method) (ISO 8968-3:2004)
ISO 1871:2009 Food and feed products General guidelines for the determination of nitrogen by the Kjeldahl method
03/300954 DC : DRAFT JAN 2003 BS ISO 8968-3 - MILK - DETERMINATION OF NITROGEN CONTENT - PART 3: BLOCK-DIGESTION METHOD - SEMI-MICRO RAPID ROUTINE METHOD
BS ISO 17997-2:2004 Milk. Determination of casein-nitrogen content Direct method
10/30212880 DC : 0 BS ISO 27871 - CHEESE AND PROCESSED CHEESE - DETERMINATION OF THE NITROGENOUS FRACTIONS
BS ISO 18329:2004 Milk and milk products. Determination of furosine content. Ion-pair reverse-phase high-performance liquid chromatography method
13/30257963 DC : 0 BS EN ISO 8968-4 - 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)
04/30126698 DC : DRAFT DEC 2004 ISO 21543 - MILK PRODUCTS - DETERMINATION OF TOTAL SOLIDS, FAT, PROTEIN AND MOISTURE CONTENTS - GUIDANCE FOR THE APPLICATION OF NEAR INFRARED SPECTROMETRY
ISO 27871:2011 Cheese and processed cheese — Determination of the nitrogenous fractions
BS EN ISO 8968-2:2002 Milk. Determination of nitrogen content Block-digestion method (Macro method)
ISO 8968-5:2001 Milk Determination of nitrogen content Part 5: Determination of protein-nitrogen content
BS EN ISO 8968-5:2002 Milk. Determination of nitrogen content Determination of protein-nitrogen content
ISO 8968-2:2001 Milk Determination of nitrogen content Part 2: Block-digestion method (Macro method)
DIN EN ISO 14891:2002-07 Milk and milk products - Determination of nitrogen content - Routine method using combustion according to the Dumas principle (ISO 14891:2002); German version EN ISO 14891:2002
DIN EN ISO 8968-5:2002-06 MILK - DETERMINATION OF NITROGEN CONTENT - PART 5: DETERMINATION OF PROTEIN-NITROGEN CONTENT

ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
ISO 385:2005 Laboratory glassware — Burettes
ISO 707:2008 Milk and milk products — Guidance on sampling
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 8655-3:2002 Piston-operated volumetric apparatus Part 3: Piston burettes

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