Application of Organic Weak Base (Imidazole, 2-Aminopyridine) Aqueous Solution System for Electrochemical Measurement of Organic Acid Content

Abstract

Organic weak bases, imidazole and 2-aminopyridine, were introduced into the electrochemical measurement of the organic acid content in food basedon conductometry. The quantitative acidbase reactions between acetic acid and the bases were found by studying the effect of the bases on the plot of specific conductance vs. the acetic acid concentration. On addition of excess imidazole or 2-aminopyridine, the linear relationship was obtained between the acetic acid concentration and specific conductance. One hundredth molar imidazole aqueous solution system was employed to determine the salt and acetic acid content in mayonnaise. The salt and acetic acid content obtained by the present method agreed accurately with the values obtained by argentometry and alkalimetry, respectively.