Determination of total selenium in geological samples by HG-AFS after concentration with thiol cotton fiber |
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| Authors: | Haifeng Fan Hanjie Wen Ruizhong Hu Bin Chang |
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| Institution: | (1) State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;(2) The Postgraduate University of Chinese Academy of Sciences, Beijing, 100039, China |
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| Abstract: | Standard reference material and different geological samples were dissolved by system A (the mixture of nitric and perchloric acids) and system B (mixture of nitric, perchloric and hydrofluoric acids), and total Se in all samples was measured by hydride-generation atomic fluorescence spectrometry (HG-AFS) after concentration with thiol cotton fiber (TCF). The analytical results obtained by the two digestion method are in good agreement (within the limit of errors) for most of the samples, particularly for those having recommended values. The Se concentrations determined by the two methods are of no difference, and the correlation coefficient is 0.9986; the relative standard deviation (RSD) for the determination of 0.04 (g/g Se is 10.2%. The recovery rates of systems A and B by the standard-addition method were 96%-106% and 99%-104%, respectively. |
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| Keywords: | thiol cotton fiber hydride generation atomic fluorescence spectrometry geological sample total selenium |
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