The study is aimed to establish a equipotential interval-potentiometric titration method used for the determination of fatty acid and amino acid nitrogen value in cereals.The result was that the average recoveries of the method,to the determination of fatty acid and amino acid nitrogen value,were 98.5% and 99.8% respectively.The intra-day RSD were 0.6%~1.6% and 0.8%~0.6% respectively,while the inter-day RSD were 1.8% and 4.6% respectively.The determination had to be completed within one day and the detectio...