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食品中苯甲酸钠、山梨酸和糖精钠的测定常用光度法和气相色谱法,一般须经抽提和净化等繁复的操作。近年来发展的高效液相色谱法对这些物质能直接或经膜滤法等简单处理后进行测定,在这方面的研究主要应用离子交换色谱法。用反相分配色谱法时,一般需先经有机溶剂抽提。Terweif-Groen 等以涂在硅藻土上的烷基胺为反离子,用离子对色谱法分离了羧酸、磺酸和酚类化合物,其中也测定了食品中的山梨酸和苯甲酸。我们用反相分配离子对色谱法分离和测定了某些
Determination of sodium benzoate, sorbic acid and sodium saccharin in food commonly used spectrophotometry and gas chromatography, usually subject to complicated operations such as extraction and purification. In recent years, the development of high performance liquid chromatography on these substances can be measured directly or after membrane filtration and other simple treatment, in this regard, the main application of ion exchange chromatography. When using reverse phase partition chromatography, it is generally necessary to first extract with an organic solvent. Terweif-Groen and other alkyl amine coated on the diatomaceous earth as a counter ion by ion-pair chromatography of carboxylic acids, sulfonic acid and phenolic compounds, which also measured the food of sorbic acid and benzoic acid. We isolated and assayed some of them by reversed-phase assignment ion-chromatography