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AACC International Approved Methods - AACC Method 07-11.01. Measurement of Sulfur Amino Acids

AACC International Approved Methods

Amino Acids

AACCI Method 07-11.01
Measurement of Sulfur Amino Acids

VIEW METHOD

Objective
To determine cysteic acid and methionine sulfone content by ion-exchange chromatography in grains, flours, meals, foods, and feeds. This method is not applicable to foods and feeds supplemented with free methionine or cysteine. Initially, protein is oxidized with performic acid to form cysteic acid and methionine sulfone; then it is hydrolyzed with 6N HCl.