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prEN ISO 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 (ISO/DIS 16634-2:2025)

Publication date:   Oct 9, 2025

General information

40.60   Close of voting   Jan 1, 2026

CEN

CEN/TC 338 Cereal and cereal products

European Norm

67.060   Cereals, pulses and derived products

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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

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EN ISO 16634-2:2016

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prEN ISO 16634-2
40.60 Close of voting
Jan 1, 2026