Abstract
The gas chromatographic conditions were studied to analyze volatile and nonvolatile organic acids simultaneously as 1-butyl ester. Eleven columns were surveyed for the separation of eleven organic acid 1-butyl esters, viz. formate, acetate, propionate, butylate, lactate, oxalate, succinate, fumarate, malate, tartarate and citrate.The 1m.×3mm. I.D. column of 20% Silicone DC 550 on Diasolid L was selected as optimum column for the separation of acid esters. Of all these acid esters, only succinate and fumarate could not be separated from each othr.For the simultaneous estrification of volatile and nonvolatile organic acids, enough ammonium hydroxide was added to make the medium basic, and the basic medium was evaporated to dryness and esterified with 1-butanol and slightly excess of hydrocloric acid. The esterified acids were chromatagraphed on the column of 20% Silicone DC 550.
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