Studies on the Analytical Method of Organic Acids in Food

A Method for the Rapid Determination of Formic and Acetic Acids in Tobacco

“…All of these gas chromatographic methods include processes which may cause significant losses of the sample: steam distillation, transfer of the acids from aqueous layer to organic layer and concentration of the organic solvent. Yamashita et at., 8,9) on the other hand, have reported a gas chromatographic method for the determination of organic acids in food as their I-butyl ester derivatives. Their I-butyl esterification method includes the pretreatment of a sample with ion exchange resins to eliminate the interferences prior to esterification.…”