NEN EN ISO 8968-1 : 2014
Current
The latest, up-to-date edition.
MILK AND MILK PRODUCTS - DETERMINATION OF NITROGEN CONTENT - PART 1: KJELDAHL PRINCIPLE AND CRUDE PROTEIN CALCULATION
12-01-2013
Foreword
1 Scope
2 Normative reference
3 Term and definition
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
9 Procedure
9.1 Test portion and pretreatment
9.2 Determination
9.3 Blank test
9.4 Recovery tests
10 Calculation and expression of results
10.1 Calculation of nitrogen content
10.2 Calculation of crude protein content
11 Precision
11.1 Interlaboratory test
11.2 Repeatability
11.3 Reproducibility
12 Test report
Annex A (informative) Modified procedure for analysis
of other milk products when a separate standard
for that product does not exist
Bibliography
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