摘要
本文研究了硒(Ⅳ)—邻苯二胺配合物的单扫描极谱行为,发现在Britton—Robinson(pH28),介质中,在溶液中生成的苤硒脑在滴汞电极上于—0.17v处产生一敏锐的配合物吸附波,同时确定了配合物的形成及其测定条件,并就其电极过程机理进行了初步探讨。在最适条件下,硒(Ⅳ)浓度在3.0×10^()-s～4.0×10^(-6)mol·dm^(-3)范围内与峰电流成良好的线性关系,本法的检测限为1.5×10^(-s)mol·dm^(-3)。
The single-sweep polarographic behaviour of Se(Ⅳ)-o-diaminobenzene was studied. In the Britton-Robinson solution (pH2.8), a sensitive adsorptive complex wave of Se(Ⅳ)-o-diaminobenzene was obtained at - 0.17v (VS. SCE) on the dropping-mercury electrode. The optimal conditions of the complex formation and the determination were decided and the mechanism of electrode process was discussed. In the optimal conditions, the selenium concentration over the range of 3.0×10-8-4.0×10-6mol·dm-3 was in good linear relationship with the peak current. Its detection limit was 1.5×10-8mol·dm-3.
