【摘要】 在示波极谱仪上,在pH4.0的邻苯二甲酸氢钾缓冲溶液中,镉（Ⅱ）一硫代氨基脲体系可产生一灵敏的导数峰,Cc_d在8.9×10^-8-3.6×10^-6M范围内与导数峰高成正比。通过多种实验方法探讨了该体系极谱波的性质和机理,认为是络合吸附波。更多还原

【Abstract】 In the supporting electrolyte containing 4.0×10-3M thiosemicarbazide(TSC)and 0.04M potassium hydrogen phthalate(pH=4),a sensitive derivative peak wave has been obtained by using single-sweep oscillopolarography.The peak potential is-0.65V(SCE).The change of peak height with the concentration of cadmium(Ⅱ)is linear in the range from 8.9×10-8 to 3.6×10-6M.The mechanism of the wave has also been studied in detail.The chronocoulometric study shows that in the presence of TSC the adsorption of Cd(Ⅱ)on the surface of Hg electrode is direct adsorption of Cd(Ⅱ)-TSC complex and the adsorbed species is Cd(TSC)2+.The electrode processes may be represented as follows更多还原