ICP-MS碰撞池技术测定食盐、调味品和尿液中的Cr、V、As和Se

Determination of trace elements in salt,condiment and urine by collision cell inductively coupled plasma mass spectrometry

目的：建立碰撞池ICP-MS测定高盐度样品如食盐、调味品和尿液中的Cr、V、As和Se的分析方法。方法：样品经稀释或消化后用ICP—MS进行分析，用耐高盐接口（Xi接口）降低非质谱干扰，用砰撞／反应池技术消除质谱干扰。结果：仪器的检出限为1．2～10ng／L．精密度优于5．3％，回收率为96．0％-105％，对3个标准参考物质的分析结果令人满意。结论：可以采用ICP-MS碰撞池技术测定食盐、海水、调味品和尿液中的Cr、V、As和Se，整个方法检出限低，并且简单、快速和准确．适用于实验室日常分析。

Objective：To develop a accuracy method to determine As,Se,Cr and V in salt,condiment, and urine by collision cell inductively coupled plasma mass spectrometry. Methods：After dilution or digestion, the samples were directly determined by inductively coupled plasma mass spectrometry using collision cell technology and Xi interface to eliminate mass spectroscopic and non - spectroscopic interference. Results：The detection limit was 1.2 - 10 ng/L, the RSD was better than 5.3% ;recoveries were 96. 0% - 105% and the results of analyzing standard reference materiel were satisfactory. Conclusion：This method is simple, sensitive and accurate, and can determine trace elements in salt, condiment and urine.