NEN EN ISO 13904 : 2016
Current
The latest, up-to-date edition.
ANIMAL FEEDING STUFFS - DETERMINATION OF TRYPTOPHAN CONTENT
01-12-2013
Foreword
1 Scope
2 Principle
3 Reagents and materials
4 Apparatus
5 Procedure
5.1 Preparation of samples
5.2 Determination of free tryptophan (extract)
5.3 Determination of total tryptophan (hydrolysate)
5.4 HPLC determination
6 Calculation of results
7 Precision
7.1 Interlaboratory test
7.2 Repeatability
7.3 Reproducibility
8 Test report
Annex A (informative) Results of an interlaboratory test
Annex B (informative) Observations on the method
Bibliography
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