微波消解-电感耦合等离子体质谱法同时测定水产品中28种微量元素

Simultaneous determination of 28 trace elements in aquatic products by microwave digestion-inductively coupled plasma mass spectrometry method

建立了微波消解-电感耦合等离子体质谱仪（ICP-MS）测定水产品中微量元素的分析方法。采用HNO3-HClH2O体系消解样品,通过在溶液中加入Au标准溶液消除系统的Hg记忆,普通/ORS混合模式-电感耦合等离子体质谱仪（ICP-MS）测定水产品中Li、Be、Al、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、As、Se、Sr、Mo、Ag、Cd、Sn、Sb、Te、Ba、Tm、Hg、Tl、Pb、U等28种微量元素。经标准物质和加标样品检测验证,测定结果与推荐值（或加标值）基本相符,回收率85.3%-110%,相对标准偏差RSD〈10%。28种元素的检测限（LOD）为0.001-0.022mg·kg-1。本方法适用于实验室开展水产品中28种微量元素的同步检测。

The validation process for the simultaneous analysis of 28 elements .. Li, Be,Al,Ti,V, Cr, Mn, Fe, Co, Ni, Cu,Zn,Ga,As,Se,Sr,Mo,Ag,Cd,Sn,Sb,Te,Ba,Tm,Hg,Ti,Pb and U in aquatic products samples by inductively coupled plasma mass spectrometry（ICP-MS） with octopole reaction system （ORS） after closed-vessel microwave digestion was described. Several criterias such as sample digestion condition,the mercury memory effect,analytical conditions,method linearity,and limits of detection（LOD） were evaluated. A standard reference material and some spiked test samples were analyzed,the recovery varied from 85.3% to 110%.The precision for this method was better than 10%. Limits of detection were obtained within the range of 0.001mg. kg^-1（Cd） to 0.022mg.kg^-1（Al）. Results indicated that this method could be used in the laboratory for the routine determination of these 28 essential and nonessential elements in aquatic products tissues.