In-situ concentration and determination of mercury by graphite furnace atomic absorption spectrometry with Pd-Rh as the chemical modifier |
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| Authors: | Zhang De-qiang Yang Li-li Sun Jian-min and Sun Han-wen |
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| Institution: | (1) Department of Chemistry, Hebei University, Baoding, 071002, P. R. China, CN;(2) Department of Chemistry, Graduate School, USTC, Chinese Academy of Sciences, 19 (A), Yuquan Road, Beijing, P. O. Box 3908, 100039, P. R. China, CN |
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| Abstract: | A method has been proposed for the determination of mercury by cold vapor generation graphite furnace atomic absorption spectrometry
(CV-GFAAS) with Pd-Rh as coating and chemical modifier. The trapping efficiency for mercury with Pd-Rh was higher than with
Pd alone. The characteristic mass of the method, which gives an integrated absorbance of 0.0044 s, was found to be 55 pg and
the absolute detection limit (3 σ) of 37 pg was obtained with the proposed modifier. The method was successfully applied to
the determination of mercury in standard reference water samples, wastewater samples and cosmetics with a recovery range of
95–104%.
Received: 10 April 1998 / Revised: 20 August 1998 / Accepted: 23 September 1998 |
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