BS EN ISO 20483:2013

Cereals and pulses. Determination of the nitrogen content and calculation of the crude protein content. Kjeldahl method. | Status: Confirmed, Current

1 Scope This International Standard specifies a method for the determination of the nitrogen content of cereals, pulses and derived products, according to the Kjeldahl method, and a method for calculating the crude protein content. The method does not distinguish between protein nitrogen and non-protein nitrogen. If it is important to determine the non-protein nitrogen content, an appropriate method would be applied.

NOTE In certain cases, full recovery of the nitrogen in nitrates and nitrites is not possible by this method.