Study was carried out on how to determine total arsenic and mercury synchronously, and screen out an optimal digestion system. Test conditions were optimized with the orthogonal test designing method. A new method of determining total arsenic and mercury in 10% hydrochloric acid solution using the dual channel atomic fluorescence spectrometry was set up for soil samples digested in aqua regia. The method has a wide linear range (As 0~200 μg/L and Hg 0~10 μg/L) and low detection limits (As 0.05 μg/L and Hg 0.007 μg/L). The recovery rate varied from 96.0% to 101.0% for As and from 97.0% to 103.7% for Hg in soils, whereas the RSD (n=6) of arsenic was 2.7% and of mercury 4.5%. The method is accurate, rapid and convenient and produces satisfactory results.
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孟立红,任凤山,刘宾.双道原子荧光光谱同时测定土壤中砷、汞的方法研究[J].土壤,2007,39(5):832-836. MENG Li-hong, REN Feng-shan, LIU Bin. Determination of Arsenic and Mercury Synchronously in Soils with Dual-Channel Atomic Fluorescence Spectrometry[J]. Soils,2007,39(5):832-836