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 can be applied.
ISO 20483:2006 Referenced Document
ISO 6540 Maize - Determination of moisture content (on milled grains and on whole grains)*, 2021-01-31 Update
ISO 712 Cereals and cereal products - Determination of moisture content - Reference method*, 2009-11-01 Update
ISO 20483:2006 history
2013ISO 20483:2013 Cereals and pulses.Determination of the nitrogen content and calculation of the crude protein content.Kjeldahl method
2006ISO 20483:2006 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method