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我国准许使用柠檬黄等七种合成色素。标准检验方法为:将样品溶液用聚酰胺吸附,解析液浓缩后,用纸色谱或薄层色谱法分离,分光光度法测定。方法手续繁杂,操作时间长。采用高效液相色谱法进行分离测定,操作简单,节省时间,取得满意结果。
My country allows the use of lemon yellow and other seven kinds of synthetic pigment. The standard test method is as follows: the sample solution is adsorbed by polyamide, the analytic solution is concentrated, then separated by paper chromatography or thin-layer chromatography and determined by spectrophotometry. Method complicated procedures, long operating time. High performance liquid chromatography for separation and determination, simple operation, save time and achieve satisfactory results.