Food products - Determination of the total nitrogen content by combustion according to the Dumas principle and calculation of the crude protein content - Part 1: Oilseeds and animal feeding stuffs (ISO/DIS 16634-1:2025)

Comment end date 2025-11-13

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Project stage codes

1. Prioritetinių darbo temų pažymėjimas ir ekspertų skyrimas

2. Projektas

3. Viešoji apklausa

From 2025-09-14 till 2025-11-13

4. Closure of enquiry

5. Submission to Formal Vote

Organisation

CEN Europos standartizacijos komitetas

Technical Committee

TK 15 Cereals, cereal products, bread and animal feeding stuffs

ForeignTC'S

CEN/TC 327

Number of comments

Comment start date

2025-09-14

Scope

ISO 16634-1:2008 specifies a method for the determination of the total nitrogen content and the calculation of crude protein content of oilseeds and animal feeding stuffs. This method, like the Kjeldahl method, does not distinguish between protein nitrogen and non-protein nitrogen. For the calculation of protein content, various conversion factors are used. This method is not applicable to milk and milk products.

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Pakeis

prEN ISO 16634-1