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EN ISO 8968-5:2001

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)

Superseded date

01-04-2016

Superseded by

EN ISO 8968-4:2016

Published date

15-12-2001

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Foreword
1 Scope
2 Normative references
3 Term and definition
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
9 Procedure
   9.1 Test portion
   9.2 Direct determination
   9.3 Indirect determination
10 Calculation and expression of results
   10.1 Calculation of protein-nitrogen content
   10.2 Calculation of true protein content
11 Precision
   11.1 Interlaboratory test
   11.2 Repeatability
   11.3 Reproducibility
12 Test report
Bibliography

ISO 8968-5|IDF 20-5:2001 specifies a method for the direct determination of the protein-nitrogen content of liquid milk, whole or skimmed.An alternative indirect method using calculations is also described.

Committee
CEN/TC 302
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Superseded
SupersededBy

ISO 8968-1:2014 Milk and milk products — Determination of nitrogen content — Part 1: Kjeldahl principle and crude protein calculation
ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
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 707:2008 Milk and milk products — Guidance on sampling
ISO 8968-2:2001 Milk Determination of nitrogen content Part 2: Block-digestion method (Macro method)
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 5725:1986 Precision of test methods Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests

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