Inductively coupled plasma atomic emission spectrometric determination of acid-soluble metal elements chromium, manganese, zinc and copper in talcum powder
HU Xiao-jing*, ZENG Ze, WANG Chang-wen, QIU Xin-yue, MU Ming-ren, FU Yao, SHEN Gui-ling, LIU Xiang-kuan
Liaoning Entry-Exit Inspection and Quarantine Buerau, Dalian 116001, China
Abstract：After digestion by aqua regia with microwave and selection of corresponding spectral lines at 267.7, 257.6, 213.8 and 324.7 nm as analytical lines, the acid-dissoluble metal elements including chromium, manganese, zinc and copper in talcum powder were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) under optimized conditions with radio frequency power of 1 250 W, auxiliary air flow rate of 0.60 L/min and atomizer pressure of 26 psi. When the concentration of each testing element was 2.0 μg/mL, the interferences caused by 20.0 μg/mL of iron, magnesium, calcium, aluminum, zinc, nickel and copper were all less than 5 %. Since the contents of these elements in talcum powder were less than 1 %, their influence on the determination could be ignored. The detection limits of chromium, manganese, zinc and copper were 0.004 8, 0.003 8, 0.001 and 0.002 6 μg/mL, respectively. This proposed method was applied in actual samples, and the determination results were consistent with those obtained by inductively coupled plasma mass spectrometry (ICP-MS) with relative standard deviations (RSD, n=8) of 1.1%-4.2% and recoveries of 93 %-107 %.
胡晓静*，曾泽，王长文，仇薪越, 牟明仁，富瑶，沈桂玲，刘向宽. 电感耦合等离子体原子发射光谱法测定滑石粉中酸溶金属元素铬锰锌铜[J]. 冶金分析, 2011, 31(9): 7-10.
HU Xiao-jing*, ZENG Ze, WANG Chang-wen, QIU Xin-yue, MU Ming-ren, FU Yao, SHEN Gui-ling, LIU Xiang-kuan. Inductively coupled plasma atomic emission spectrometric determination of acid-soluble metal elements chromium, manganese, zinc and copper in talcum powder. , 2011, 31(9): 7-10.
