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有机酸的分析过去多采用气相色谱法,由于其强极性、部分有机酸的热不稳定性和吸附性,一般是在酯化后间接分析,十分费时。液相色谱的发展为有机酸的分析提供了有效的方法,特别是近几年来开发的离子色谱法显示了简便、快速和高灵敏度的独特优点。 Pohl依据离子排斥原理,用H~+型阳离子交换树脂分离柱,1mM HCl洗脱液和Ag~+型抑制柱分析有机酸,申请了专利,但由于抑制柱中生成AgCl沉淀堵塞柱子,使方法的应
The analysis of organic acids in the past by gas chromatography, due to its strong polarity, the thermal instability and adsorption of some organic acids, is generally indirect analysis after esterification, very time-consuming. The development of liquid chromatography provides an effective method for the analysis of organic acids. In particular, the development of ion chromatography in recent years shows the unique advantages of simplicity, rapidity and high sensitivity. Pohl patented H + -type cation exchange resin separation column, 1 mM HCl eluent and Ag + -type suppression column for organic acids analysis based on the principle of ion exclusion. However, the method of blocking the column by inhibiting the formation of AgCl precipitate in the column, Should be