4种微波消解体系测定大气细颗粒物中重金属元素的比较

Comparison of Four Microwave Digestion Systems for Determination of Heavy Metal Elements in Atmospheric Fine Particles

本文采用聚丙烯滤膜采集泰安市区大气细颗粒物(PM_(2.5))样品,利用HNO_()3(放置过夜)+H_(2)O_(2)微波消解-电感耦合等离子体质谱法测定样品中的10种重金属元素。试验结果表明,各元素的相关系数均大于0.9999,精密度为2.7%~4.6%,加标回收率为91%~107%,与其他3种消解体系相比,HNO_(3)(放置过夜)+H_(2)O_(2)微波消解更加快速、高效、准确。

In this paper,polypropylene filter membrane is used to collect fine particulate matter(PM_(2.5))samples in Tai’an urban area,and 10 heavy metal elements in the samples are determined by HNO_(3)(placed overnight)+H_(2)O_(2) microwave digestion-inductively coupled plasma mass spectrometry.The test results show that the correlation coefficients of each element are all greater than 0.9999,the precision is 2.7%~4.6%,and the recovery rate of standard addition is 91%~107%,compared with the other three digestion systems,HNO_(3)(placed overnight)+H_(2)O_(2) microwave digestion is faster,more efficient and more accurate.