电驱动膜萃取法在蔬菜水果硒元素检测中的应用

摘要

A new method for the determination of selenium(Se) in vegetables and fruits was developed using electric membrane extraction.The effects of several factors were investigated, such as Time spent, Consumption of reagents and Detection limit of sample.The results showed that the detection limit of sample was 0.005 mg/kg by spending few time and reagent.The recovery of Se was 92.4% on an average.Through the verification of the national standard reference materials, the experimental results meet the requirements of the uncertainty.The method is suitable for the detection of selenium in fruits and vegetables.%提出一种新方法,将样品通过混合酸消化后应用电驱动膜萃取技术富集其中的硒元素,然后测定其含量.结果表明,该方法缩短了检测时间,减少了试剂消耗,实际样品检出限可达到0.005 mg/kg,平均回收率为92.4%.通过国家标准物质验证,试验结果符合其不确定度要求.该方法适宜蔬菜水果中硒的检验.