Determination of trace gold and palladium in rock and mineral by inductively coupled plasma mass spectrometry after separation and enrichment with sulfhydryl cotton
CHEN Yong-xin, WEI Xin-hong, LI Xiang-rong, LV Ze-e, RUAN Gui-wu
Fangchenggang Entry-Exit Inspection and Quarantine Bureau, Fangchenggang 538001, China
Abstract：After dissolved with mixed acids, gold and palladium in rock and mineral samples were separated and enriched by sulfhydryl cotton in 1.2 mol/L HCl solution. Consequently, a determination method of gold and palladium by inductively coupled plasma mass spectrometry (ICP-MS) was established. The experiment conditions about sample decomposition, adsorption and elution were discussed. Experiment results showed that the mass spectral interference was eliminated by sulfhydryl cotton separation and enrichment in combination with selecting appropriate analytical element. Then, the matrix effect and instrument fluctuation were corrected with matrix matching method and Re as the internal standard element. The detection limits of this method for gold and palladium were 0.13 and 0.22 ng/g respectively. When the method has been applied to determine certified reference materials, the results were consistent with the certified values with the relative standard deviations (RSD, n＝9) of 4.8％-8.3%, which could meet the analysis and testing requirements for rock and mineral samples.
陈永欣，韦新红，黎香荣，吕泽娥，阮贵武. 巯基棉分离富集－电感耦合等离子体质谱法测定岩矿中痕量金和钯[J]. 冶金分析, 2011, 31(6): 14-18.
CHEN Yong-xin, WEI Xin-hong, LI Xiang-rong, LV Ze-e, RUAN Gui-wu. Determination of trace gold and palladium in rock and mineral by inductively coupled plasma mass spectrometry after separation and enrichment with sulfhydryl cotton. , 2011, 31(6): 14-18.
