高效液相色谱法测定精对苯二甲酸中主要有机杂质

Determination of Main Organic Impurities in Purified Terephthalic Acid by High Performance Liquid Chromatography

本文建立了期货交割精对苯二甲酸（PTA）样品中主要杂质的快速测定方法，该法对羧基苯甲醛（4-CBA）和对甲基苯甲酸（p-TOL）在0～50．0mg／kg和0～300．0mg／kg范围内有较好的线性关系，相关系数R=0．9990，平均回收率在89．30％～104．28％，该方法为期货交割PTA样品品质提供了良好的技术支持。

This paper described an improved method for fast determination of main impurities in purified terephthalic acid（PTA） during the time bargain process. The detection limits of 4-carboxybenzaldehyde （4-CBA） and p-toluic acid（p-TOL） were 0. 1 mg/kg and 0. 5 mg/kg, respectively, which showed excellent sensitivity. Good linear ranges of 0 - 50.0 mg/kg and 0 - 300.0 mg/kg were obtained with regression coefficients more than 0. 9990 and the recoveris were 89.30%-104.28%.