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本文报道了用离子排斥色谱法和电导检测器分离和检测有机酸的色谱条件。选用最常见的盐酸代替辛烷磺酸或全氟丁酸作淋洗液,对36种有机酸在离子排斥柱上的保留进行了较系统的研究,找出了有机酸的pKa值和分子结构与保留时间的关系和规律,并将方法试用于多种水样和饮料中有机酸的测定。
This paper reports the chromatographic conditions for the separation and detection of organic acids by ion exclusion chromatography and conductivity detection. The most commonly used hydrochloric acid was used instead of octane sulfonic acid or perfluorobutyric acid as the eluent. The retention of 36 organic acids on ion-exclusion column was studied systematically, and the pKa value and molecular structure of organic acids And the retention time and the law, and the method of testing a variety of samples of water and organic acids determination.