微波消解-电感耦合等离子体质谱法测定火锅添加剂中的6种重金属  

Determination of 6 heavy metals in chafing dish additives by ICP-MS after microwave digestion

作　　者：臧李纳[1] 湛社霞[1] 罗胜强[1] 孙世宏[1] 张宏[1] 邬泉周[2] 

机构地区：[1]广州市天河区疾病预防控制中心,广州510655 [2]广州中医药大学,广州510006

出　　处：《中国卫生检验杂志》2012年第9期2025-2027,共3页Chinese Journal of Health Laboratory Technology

基　　金：广东省科技计划项目(2011B031500028)

摘　　要：目的:建立一种用微波消解-电感耦合等离子体质谱法(ICP-MS)同时测定火锅添加剂中多种重金属方法。方法:样品经过微波消解前处理,经ICP-MS特征波长定性扫描后,分别选取51.9Cr、62.9Cu、74.9As、89.9Zr、110.9Cd、207.9Pb同位素的波长对样品进行定量测定。结果:用本方法相关系数可达0.9999,相对标准偏差为0.53%～2.91%,回收率在91.0%～103.3%之间,六种金属Cr、Cu、As、Zr、Cd、Pb的方法检出限依次为0.0008 mg/L、0.0005 mg/L、0.0005 mg/L、0.0005 mg/L、0.0002 mg/L和0.0006 mg/L。结论:该法能同时测定火锅添加剂中多种重金属,回收率高,重现性好,检测限低,可满足火锅添加剂实际样品的检测需求。Objective：To establish an analytical method for the determination of heavy metals in chafing dish additives by an Inductive Coupled Plasma-Mass Spectrometry（ICP-MS） after microwave digestion.Methods： After the pretreatment,the samples were measured and quantified by ICP-MS,with isotope m/z at 51.9 for Cr,62.9 for Cu,74.9 for As,89.9 for Zr,110.9 for Cd and 207.9 for Pb.Results： The correlation coefficients of the method were all up to 0.9999,with relative standard deviations（RSDs） of 0.53%~2.91% and the recoveries of 91.0%~103.3%.The detection limits for Cr,Cu,As,Zr,Cd and Pb were 0.0008 mg/L,0.0005 mg/L,0.0005 mg/L,0.0005 mg/L,0.0002 mg/L and 0.0006 mg/L.Conclusion： This method was proved to be an accurate and precise to determine the objective analytes in the flavoring samples of chafing dish additives.

关 键 词：微波消解 电感耦合等离子体质谱 重金属 火锅添加剂 

分 类 号：O657.63[理学—分析化学]