【摘要】 根据薄层色谱理论和工作实际,提出了调味品样品薄层色谱法分析的前处理方法及加标定量法。样品溶液在聚酰胺薄膜上上行展开10cm,R_f值为0.71。该方法不需要大型仪器和特殊试剂,适用于多个样品的低价快速检测,本法也适用于山梨酸的检测。更多还原

【Abstract】 This essay,depends upon the theory of chromatography and practice,discusses the sample preparation and addition standard method on the determination of benzoic acid by the thin layer chromatography (TLC) in Condiment. The chromatography is 10cm and the Rf value of benzoic acid is 7.1. This method hsa high sample throughput at low operating costs without any large equiment and special resgent. This method is suitable for sorbic acid without modification.更多还原