Determination of Trace Mercury with Thioacetamide in Environmental Water Samples by Resonance Light Scatting

doi:10.3724/SP.J.1095.2011.00093

Chinese Journal of Applied Chemistry

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Determination of Trace Mercury with Thioacetamide in Environmental Water Samples by Resonance Light Scatting

WANG Yingying, LI Huachun, TAN Kejun^*

(Key Laboratory of Eco-Environments of Three Gorges Reservoir Region under Ministry
of Education of PRC,College of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715)

Received:2011-03-10 Revised:2011-05-03 Published:2012-02-10 Online:2012-02-10

Abstract

Abstract: In pH=3.29 acidic medium, the interaction of Hg(Ⅱ) with thioacetamide(TAA) occurs and results in greatly enhanced resonance light scattering(RLS) signals characterized by a peak at 379.0 nm. The results show that the enhanced RLS signals intensity(ΔIRLS) at 379.0 nm is proportional to the concentration of TAA. A RLS method for the determination of trace mercury ions is then established accordingly. The linear range is 0.2~10.0 μmol/L. The limit of detection is 0.02 μmol/L for Hg(Ⅱ). Effects of the acidity, ionic strength, temperature and coexisting substances interference are also investigated. The method has been applied successfully to the determination of Hg2+ in environmental samples.

Key words: resonance light scattering, mercury, thioacetamide (TAA)

CLC Number:

O657.3

WANG Yingying, LI Huachun, TAN Kejun*. Determination of Trace Mercury with Thioacetamide in Environmental Water Samples by Resonance Light Scatting[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2011.00093.

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Determination of Trace Mercury with Thioacetamide in Environmental Water Samples by Resonance Light Scatting

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