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本文研究了在0.01mol/L NaOH—0.32％乙二胺—0.05mol/L酒石酸钾钠介质中,锰与4-(2-噻唑偶氮)间苯二酚(TAR)络合吸附波的极谱行为。当介质中含有0.003％TAR时,Mn会产生灵敏的导数极谱波,其峰电位为-0.75V(相对银汞齐电极,下同),方法检出限为1.5×10~(-9)mol/L,线性范围为3.6×1.0~(-9)mol/L～2.7×10~(-6)mol/L。研究了极谱波的性质、机理以及络合物的组成。方法成功地应用于某些植物叶中微量锰的含量测定。
In this paper, we studied the effect of manganese on the adsorption of 4- (2-thiazolylazo) resorcinol (TAR) in 0.01 mol / L NaOH-0.32% ethylenediamine-0.05 mol / L potassium sodium tartrate Spectrum behavior. When the medium contains 0.003% TAR, Mn has a sensitive derivative polarographic wave with a peak potential of -0.75V (relative to silver amalgam electrode, the same below) with a detection limit of 1.5 × 10 -9 mol / L, the linear range was 3.6 × 1.0 ~ (-9) mol / L ~ 2.7 × 10 ~ (-6) mol / L. The properties and mechanism of polarographic wave and the composition of complex were studied. The method was successfully applied to the determination of trace manganese in some plant leaves.