电感耦合等离子体质谱法测定食品级磷酸盐中杂质元素  

Determination of Impurity Elements in Edible Phosphate by ICP-MS

作　　者：李坦平[1] 谢华林[2] 

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

出　　处：《光谱学与光谱分析》2012年第10期2834-2837,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(21075138);重庆市自然科学基金项目(cstc2011jjA0780);重庆市教委科学技术研究项目(KJ121311)资助

摘　　要：建立了电感耦合等离子体质谱(ICP-MS)法测定食品级磷酸盐中Mg,Ti,V,Cr,Fe,Co,Ni,Cu,Zn,As,Cd,Pb等12种杂质元素的分析方法。样品经硝酸消解后直接进行分析,应用碰撞/反应池(ORS)技术有效地消除了多原子离子对待测元素的干扰,选用Sc,Y,In,Bi等元素为内标混合液校正基体干扰和漂移。研究结果表明,该方法对12种待测元素的检出限在0.004～0.362μg.L-1之间。本法简便,快速,能满足食品级磷酸盐中多种杂质元素同时测定的分析需求。An octopole reaction system （ORS） inductively coupled plasma mass spectrometry （ICP-MS） was developed for the determination of Mg, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, As, CA and Pb in edible phosphate. The sample was digested by HNO3 followed by dilution with ultrapure water, then the above 12 impurity elements in the solution were analyzed directly by ICP-MS. The use of ORS can eliminate the interference of polyatomic ions dramatically. Sc, Y, In and Bi were used to correct the matrix interference and drift. The detection limits of the 12 elements are in the range of 0. 004-0. 362μg · L^-1. This method is rapid, simple and applicable for the analysis of trace elements in edible phosphate.

关 键 词：电感耦合等离子体质谱法 八极杆碰撞/反应池 磷酸盐 杂质元素 

分 类 号：O657.6[理学—分析化学]