Determination of acid content in waste liquid from adipic acid production by high performance liquid chromatography
A method for the determination of nitric acid and dibasic acid in waste liquid from adipic acid production by high performance liquid chromatography was proposed.The pretreatment conditions of samples were determined by examining the influence of its dilution ratio.The determination of content of nitric acid and dibasic acid in adipic acid production waste liquid by HPLC was achieved by using methanol/phosphoric acid buffer solution(pH=2.5)with volume ratio of 2∶8 as mobile phase,column temperature of 30℃and wavelength of 210 nm.The recovery rate was 96.55%～102.31%,and the relative standard deviations(n=6)of each component was less than 5%.The method withthe feature of simple,accurate and rapid,was suitable for the determination of nitric acid and dibasic acid in adipic acid production waste liquid.
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