【摘要】 邻苯二酚紫在适当的底液中可以产生一个良好的示波极谱波,加入钆后这个波的波高降低,而在稍负电位出现一个尖峰形的新波,其波高与钆浓度有线性关系。选择0.3MNH₄Cl-0.003M（CH₂）₆N₄混合溶液作为支持电解质,在pH5.5时配合物波高较大且与邻苯二酚紫的还原峰相距较远,易于分辨。在1×10^-6～2×10^-5M范围内波高与Gd³⁺浓度成正比。其他稀土离子有类似的波峰。研究了这个波的机理,认为它是一种配合吸附波。更多还原

【Abstract】 In certain supporting electrolytes, pyrocatechol violet （PV） may be reduced at single-sweep polarograph and a well-defined wave can be observed. The height of this wave decreases when Gd³⁺ is added into the solution and a sharp-peaked new wave is observed at more negative potentials. The height of this new wave is proportional to the concentration of gadolinium added. NH₄Cl-（CH₂）₆N₄ mixture（pH 5.5） was chosen as the suitable supporting electrolyte, in which the new wave of the Gd³⁺-PV complex is higher and the difference of peak potentials between PV and complex is larger. The linear relationship between wave height and concentration of Gd3+ holds in the range of 1×10^-6～2×10^-5 M. In this system other rare earth elements exhibit similar wave peaks. This wave has been proved to be an adsorptive-complex wave by several experiments.更多还原