有机酸和有机酸盐的静电离子色谱研究

Simultaneous Separation of Organic Acid and Organic Salts by Electrostatic Ion Chromatography

以涂敷了两性表面活性剂胆汁酸盐的十八烷基键合硅胶为固定相 ,以去离子水为流动相 ,选用电导检测器 ,研究了有机酸及其盐的同时分离 ;探讨了草酸钠、柠檬酸、苯甲酸钠溶液的色谱分离条件及分离机制 ,并应用于饮料中的苯甲酸钠和柠檬酸的定量测定。实验表明 ,这种以纯水为流动相的色谱过程 ,不仅具有快速简单、检测背景干扰小、重现性好等特点 ,而且有效地克服了二次环境污染 ,是一种对环境友好的分析方法。

The electrostatic ion chromatographic column was prepared by coating conjugated acid salt micelles on the surface of octadecyl silica stationary phase Pure water was used as mobile phase, and the conductance detector was connected on line to electrostatic ion chromatograph. The conditions under which organic acid and organic salts were detected were studied The mechanism for the above separation is discussed Sodium benzoate and citric acid in Lichee drink were separated and determined This method is rapid, simple with little interference and good reproducibility without any pollution since the mobile phase is water. This is an environmental friendly analytical method