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ISO/DIS 16634-2

Food products — Determination of the total nitrogen content by combustion according to the Dumas principle and calculation of the crude protein content — Part 2: Cereals, pulses and cereal coproducts

General information

40.20     Oct 9, 2025

ISO

ISO/TC 34/SC 4

International Standard

67.050     67.060  

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Scope

ISO 16634-2:2016 specifies a method for the determination of the total nitrogen content and the calculation of the crude protein content of cereals, pulses and milled cereal products.
This method, like the Kjeldahl method (see References [1] and [6]), does not distinguish between protein nitrogen and non-protein nitrogen. For the calculation of the protein content, various conversion factors are used (see 3.2).

Life cycle

PREVIOUSLY

PUBLISHED
ISO 16634-2:2016

NOW

PROJECT
ISO/DIS 16634-2
40.20 DIS ballot initiated: 12 weeks
Oct 9, 2025

National adoptions

naSRPS EN ISO 16634-2:2023  
ISS

Food products - Determination of the total nitrogen content by combustion according to the Dumas principle and calculation of the crude protein content -Part 2: Cereals, pulses and cereal coproducts (ISO/DIS 16634-2:2025)

40.20   DIS ballot initiated: 12 weeks

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