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.
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