ICP-MS法测定食用明胶中重金属元素  

Determination of trace heavy metal elements in edible gelatine using ICP-MS

作　　者：谢华林[1] 张萍[2] 

机构地区：[1]长江师范学院化学化工学院,重庆408100 [2]湖南工学院材料与化学工程系,衡阳421002

出　　处：《食品科技》2012年第9期328-330,335,共4页Food Science and Technology

基　　金：湖南省教育厅科研项目(10C0575;10CY002);重庆市自然科学基金项目(cstc2011jjA0780)

摘　　要：利用电感耦合等离子体质谱法(ICP-MS)测定食用明胶中Cr、Mn、Ni、As、Cd、Sb、Hg、Pb等8种重金属元素的分析方法。通过优化仪器的工作参数、选择适宜待测元素的同位素以及选用干扰元素校正方程可以克服质谱干扰,以Sc、Rh、Bi为内标元素,样品的基体效应和仪器漂移得到了很好地校正。结果表明,8种重金属元素的检出限在0.002～0.091μg/L之间,RSD<2.11%,回收率在91.5%～109.0%之间,方法与其他分析对照,结果一致。An analytical method was developed for the determination of Cr, Mn, Ni, As, Cd, Sb, Hg and Pb elements in edible gelatine by inductively coupled plasma mass spectrometry （ICP-MS）. It was found that the spectral interferences could be calibrated by settings of the operational parameters of ICP-MS, selecting different isotops and correction equation of interference elements. The matrix effects and the instrument drift could be eliminated by selecting Sc, Rh and Bi as the internal standard elements. The result indicated that the detection limits range from 0.002 IJg/L to 0.091 pg/L depending on the elements, recoveries of samples were of the range 91.5%~109.0% and precision was fine RSD〈2.11%. The determination results of actual samples are in good agreement with those obtained by other methods.

关 键 词：电感耦合等离子体质谱 食用明胶 重金属元素 基体效应 质谱干扰 

分 类 号：TS207.51[轻工技术与工程—食品科学]