钯(Ⅱ)-组氨酸络合物极谱波的研究

Polarographic Wave of Palladium ( Ⅲ )-Histidine Complex

本文用极谱法研究了Pd(Ⅱ)-组氨酸络合物波的形成条件和性质,用线性法和连续变化法确定了Pd(Ⅱ)与组氨酸的络合物比为1:2,络合物的稳定常数β为3.47×10^(19)。测定钯的线性范围为0.02～0.7μg/ml。

The polarographic wave of Pd(Ⅱ)-histidine complex is studied in Britton-Robin-son buffer(pH = 9. 2) solution. The electrode reaction mechanism of the complex is also in vestigated . The determined composition of the complex of Pd:histidine is 1:2 and the stability constant of the complex is 3. 47×10^(19). This method can be used to determine 0. 02μg/ ml Pd at a minimum concentration limitation. The linear range of the determination of palladium is 0. 02~0.7μg/ml.