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日本允许在油脂和黄油中添加0.1g/kg以下的柠檬酸异丙酯作为抗氧化剂。柠檬酸异丙酯是1-单酯、2-单酯、1,2-二酯、1,3-二酯和三酯的五种酯的混合物。作者研究了用硅镁柱净化,同时分别测定柠檬酸单酯、二酯和三酯的方法,取得良好结果。用含水率15%的硅镁吸附柱,用己烷:乙醚(4:1)80ml洗涤,再用己烷:乙醚(1:1)混合液100ml洗脱,可把常用的食品添加剂BHA、BHT、山梨酸、苯甲酸等溶出。并且把其他干扰物分离、气相色谱柱采用1%OV-
Japan allows the addition of 0.1 g / kg or less of isopropyl citrate to oils and greases as an antioxidant. Isopropyl citrate is a mixture of five esters of 1-monoesters, 2-monoesters, 1,2-diesters, 1,3-diesters and triesters. The authors studied the use of silica gel column purification, while the determination of citric acid monoester, diester and triester method, and achieved good results. With a moisture content of 15% of the silica-magnesium adsorption column, with hexane: ether (4: 1) 80ml washing, and then hexane: ether (1: 1) mixture of 100ml eluting the commonly used food additives BHA, BHT , Sorbic acid, benzoic acid and other dissolution. And other interferences were separated, the gas chromatographic column with 1% OV-