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Published on: July 10, 2015
[Determination of impurity elements in high-purity aluminium using inductively coupled plasma-mass spectrometry after
Hua-lin Xie1, Xi-du Nie, Li-bo Li
1Department of Chemical Engineering, Hunan Institute of Technology, Hengyang 421008, China. hualinxie@vip.163.com
Abstract:
To establish the method for the determination of 7 trace impurity elements including Co, Ni, Cu, Mo, Cd, Pb and Bi in high-purity aluminium by inductively coupled plasma-mass spectrometry (ICP-MS), the impurity elements were extracted from the aluminium matrix in the form of chelates with ammonium pyrrolidine dithiocarbamate (APDC) into methyl isobutylketone (MIBK). The instrument parameters, and conditions of separation and interference of matrix were discussed in detail. The optimal detection conditions were determined. The detection limits range from 0. 011 to 0. 052 microg x L(-1) depending on the elements, recoveries of samples are in the range of 92. 2%-103. 0%, and the precision is RSD<2. 3%. This method is accurate, quick and convenient. It is used in the determination of impurity elements in high-purity aluminium with satisfactory results.
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