Abstract：After microwave digestion, the content of 12 trace metal elements in talcum powder was determined by inductively coupled plasma mass spectrometry, including Pb, Cd, Cr, As, Sb, Cu, Zn, Mn, Ni, Mo, Co and Sr. The results showed that 0.5 g of talcum powder sample could be fully digested with 15 mL of nitric acid under optimal digestion procedures (digestion at 250 W for 2 min, keeping at 0 W for 2 min, digestion at 450 W for 5 min and then digestion at 550 W for 5 min). The mass spectrometric interference could be eliminated by selecting isotopes and using correction equation. The influence of matrix effect could be overcome by on-line adding proper internal standard elements. The proposed method was applied to the analysis of actual samples. The recoveries of testing elements were between 95 % and 109 %. The relative standard deviations (RSD, n=8) were in range of 2.1 %－12.0 %. The determination results were consistent with those obtained by graphite furnace atomic absorption spectrometry (GF-AAS), inductively coupled plasma atomic emission spectrometry (ICP-AES) and hydride generation atomic fluorescence spectrometry (HG-AFS).
胡晓静*，庞艳华，赵景红，盛向军，任玉伟，张华一，陈新，王玉萍. 微波消解-电感耦合等离子体质谱法测定滑石粉中多种痕量金属元素[J]. 冶金分析, 2011, 31(11): 29-33.
HU Xiao-jing*, PANG Yan-hua, ZHAO Jing-hong, SHENG Xiang-jun, REN Yu-wei, ZHANG Hua-yi, CHEN Xin, WANG Yu-ping. Determination of multiple trace elements in talcum powder by inductively coupled plasma mass spectrometry after microwave digestion. , 2011, 31(11): 29-33.
