微波消解ICP-OES法同时测定总悬浮颗粒物中多种重金属

Determination of Heavy Metals in Total Suspended Particulate by Microwave-Assisted Digestion Coupled with Plasma Spectroscopy(ICP-OES)

采用微波消解前处理与电感耦合等离子光谱联用技术,初步建立了一套大气总悬浮颗粒物(TSP)中重金属元素的检测方法。研究了不同的滤膜材料、消解方式、波长选择等对分析方法的影响。用所建立的方法测定长沙市火车站采集的大气总悬浮颗粒物中的重金属As、Cd、Co、Cr、Cu、Mn、Mo、Ni、Pb、Zn的含量,检测结果令人满意。最低检出浓度为0.0001～0.005μg/m3,相对标准偏差为0.9%～11.4%,加标回收率为90.9%～106.7%。

A method is established to determine the heavy metals in the environment total suspended particulate （TSP） by inductively coupled plasma spectroscopy and microwave-assisted digestion. The effects of filter mem- brane, digestion and wavelength are studied. The method proves to be satisfying when used for the determination of the heavy metals （As, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb and Zn） in TSP sample collected in Changsha railway station. The minimum detectable concentration is from 0. 00011.μg/m3 to 0. 005μg/m3, the RSD is from 0. 9 % to 11.4 % and the recovery is from 90. 9% to 106.7%.