【摘要】 报道了一个测定硒的高灵敏极谱吸附波新体系。在 ０． ７ ｍｏｌ／Ｌ ＨＢｒ溶液中，Ｓｅ（Ⅳ）－ （Ｃ２Ｈ５）４ＮＩ－Ａｓ（Ⅲ）体系于－０．６１Ｖ（ｖｓ．ＳＣＥ）处产生一高灵敏的极谱吸附波。峰电流与Ｓｅ （ Ⅳ）浓度在 ０． １～４０ μｇ／Ｌ范围内呈线性关系。检出限为 ０． ０５ μｇ／Ｌ。研究了极谱波的性质。 用本法测定了土壤中的全硒和有效硒，结果满意。更多还原

【Abstract】 A highly sensitive polarographic adsorptive wave system for the determination of selenium has been proposed. In a solution of 0. 7 mol/L hydrobromic acid, a highly sensitive polarographic adsorptive wave of Se(Ⅳ)-(C2H5)4NI-As (Ⅲ ) system was obtained by singlesweep polarography. The peak potential is at-0. 61 V(vs. SCE). The peak cnrrent is linearly proportional to the concentration of selenium in the range of 0. 1-40 μg/L. The character of the polarographic wave was studied. The method has been applied to the determination of total selenium and available selenium in soil with satisfactory results.更多还原