微波消解-电感耦合等离子体质谱法同时测定聚氯乙烯塑料中的铅、镉、汞、铬

Determination of Lead, Cadmium, Mercury and Chromium in Polyvinyl Chloride Using Microwave Digestion-ICP-MS

本文采用微波消解技术作为前处理手段,用电感耦合等离子体质谱(ICP-MS)法同时测定聚氯乙烯塑料中的铅、镉、汞、铬四种元素。对仪器的参数设置、样品的消解方法与体系进行了优化,为同类样品的分析提供了参考。方法检出限为1.4～7.2 ng·g^(-1),相对标准偏差为0.6～5.8%。

A method was studied for the analysis of Cd, Hg, Pb and Cr in polyvinyl chloride by using ICP -MS. The instrument parameters and the digestion condition have been optimized systematically, which afford reference for the preparation of the same kinds of polymer samples. Method detection limits for all sample elements were between 1.4 - 7.2 ng·g^-1, the relative standard deviations were between 0.6 - 5.8 %.