【摘要】 研究了砷（Ⅲ）－吡咯烷二硫代甲酸铵（ＡＰＤＣ）配合物的卷积伏。安行为，结果表明，在酸性介质中，ＡＰＤＣ在悬汞电极上于－０．４３Ｖ（ｖｓ．Ａｇ／ＡｇＣｌ）处有一吸附溶出还原峰，加入Ａｓ（Ⅲ）后，Ａｓ（Ⅲ）－ＡＰＤＣ配合物于－０．４６Ｖ处产生一灵敏的吸附溶出还原峰。据此建立了测定痕量砷的吸附溶出卷积伏。安法。测定的线性范围为６．７×１０￣（－１０）～１．１×１０￣（－７）ｍｏｌ／Ｌ，检出下限为２．７×１０￣（－１０）ｍｏｌ／Ｌ．本方法用于生物材料标样及试样测定获得满意结果，还研究了Ａｓ（Ⅲ）－ＡＰＤＣ配合物的极谱电流性质，并初步探讨了电极反应机理．更多还原

【Abstract】 The adsorptive stripphg dcconvolution voltammetric behavior and the current nature of As（Ⅲ）- APDC chelate are studied. In the supporting electrolyte of 0.3 mol/L H₂SO₄ solu-tion, there is a sensitive adsorptive stripping peak of As（Ⅲ）-APDC chelate at-0.46 V（vs.Ag/AgCl）.The peak height is linearly related to the concentration of As（Ⅲ）in the range of6.7×10￣（-10）～1.1×10￣（-7） mol/L and the limit of detection is 2.7×10￣（-10）mol/L. the results ofthe determination of trace As in standard reference materials and Samples of tea are all foundto be satisfactory.更多还原