离子交换分离-电感耦合等离子体质谱法测定蔬菜中六价铬的含量  

Determination of Chromium(Ⅵ) in Vegetables by Ion-exchange separation-ICP-MS

作　　者：王岩 宋磊 WANG Yan;SONG Lei(Linyi Municipal Institute of Supervision and Inspection of Product Quality,Linyi 276007,China;Linyi Food and Drug Inspection and Testing Center,Linyi 276000,China)

机构地区：[1]临沂市产品质量监督检验所,山东临沂276007 [2]临沂市食品药品检验检测中心,山东临沂276000

出　　处：《化工技术与开发》2018年第9期42-45,50,共5页Technology & Development of Chemical Industry

摘　　要：建立了一种采用离子交换分离-电感耦合等离子体质谱法测定蔬菜中六价铬含量的方法。样品经高温灰化、碱性溶液提取并经阳离子交换树脂分离,用ICP-MS对六价铬进行检测。试验结果表明,添加水平为0.04～2.00mg·kg^(-1)时,回收率为86.5%～92.3%,相对标准偏差(RSD)小于6.6%(n=6)。该方法操作简单,回收率高,重现性好,适合蔬菜中六价铬的测定。A new method was developed to determine chromium(Ⅵ)in vegetables by ion-exchang-ICP-MS.The sample was ashed by high temperature,then extracted with alkaline solution,separated with ion cation exchange resin,and detected by ICPMS.The study results indicated that the recoveries were between 86.5%~92.3%,and the relative standard deviations(RSDs)were less than 6.6%(n=6)with the spiked level of 0.04~2.00 mg/kg.The method had the advantages of simplicity,high recovery and good reproducibility,so it was suitable for the determination of chromium(Ⅵ)in vegetables.

关 键 词：离子交换分离 电感耦合等离子体质谱仪 六价铬 

分 类 号：O657.63[理学—分析化学]