高等学校化学学报

高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (12): 1085.

• 研究论文 • 上一篇    下一篇

镉(Ⅱ)-硫代氨基脲体系的络合吸附波的研究

胡乃非, 李启隆, 林树昌   

  1. 北京师范大学化学系
  • 收稿日期:1985-09-17 出版日期:1986-12-24 发布日期:1986-12-24

Studyies on the Adsorptive-Complex Wave of Cadmium(Ⅱ)with Thiosemicarbazide

Hu Naifei, Li Qilong, Lin Shuchang   

  1. Department of Chemistry, Beijing Normal University, Beijing
  • Received:1985-09-17 Online:1986-12-24 Published:1986-12-24

PDF (PC)

被引次数

6

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,Ccd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。

Abstract: In the supporting electrolyte containing4.0×10-3Mthiosemicarbazide(TSC)and 0.04Mpotassium 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 TSCthe adsorption of Cd(Ⅱ)on the surface of Hg electrode is direct adsorption of Cd(Ⅱ)-TSCcomplex and the adsorbed species is Cd(TSC)2+.

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