105/2 Determination of Crude Protein in Cereals and Cereal Products for Food and for Feed

Methods Type: Generic Methods
Key data
Number: 105/2
Analyte: Crude Protein
Matrix: Cereals and Cereal Products for Food and for Feed
Year of Approval: 1980
Year of Last Revision: 1994
Scope: This method is envisaged for the determination of crude protein content in cereals and cereal products.
Principle: The organic matter of the sample is oxidized with concentrated sulfuric acid in the presence of a catalyst: the product of the reaction (NH4)2SO4 is treated by alkali; free ammonia is distilled and titrated.

Definition

Crude protein is a conventional expression for the total content of nitrogenous compounds of the analysed product, calculated by multiplying the corresponding total nitrogen content by an conventional factor.

 

Purchase this ICC Standard Method now and download it immediately!