高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (8): 796.

• 研究论文 • 上一篇    下一篇

镍(Ⅱ)-硫代氨基脲体系的吸附伏安法研究

胡乃非, 李启隆   

  1. 北京师范大学化学系
  • 收稿日期:1987-12-08 出版日期:1989-08-24 发布日期:1989-08-24
  • 通讯作者: 李启隆
  • 基金资助:

    国家自然科学基金

Studies on Adsorptive Voltammetry for the Nickel (Ⅱ)-Thiosemicarbazide System

Hu Naifei, Li Qilong   

  1. Department of Chemistry, Beijing Normal University, Beijing
  • Received:1987-12-08 Online:1989-08-24 Published:1989-08-24

PDF (PC)

被引次数

7

摘要： 本文用计时电量法探讨了镍(Ⅱ)-硫代氨基脲在悬汞电极上吸附还原的机理,表明其吸附模式为直接吸附,吸附形体为Ni(T3C)22+。利用Ni(TSC)22+络合物的吸附性,可采用预先将Ni(TSC)22+吸附富集在悬汞电极上然后再进行电位扫描的吸附伏安法来测定痕量Ni.线性扫描伏安法和微分脉冲伏安法的检测下限可分别达到1×10-8mol/L和4×10-9mol/L。

关键词: 镍, 硫代氨基脲, 计时电量法, 吸附伏安法

Abstract: In a supporting electrolyte containing 0.025 mol/Lpotassium hydrogen phthalate, a sensitive adsorptive peak of Ni(Ⅱ)-TSCsystem at the Hg electrode was found.The mechanism of the peak was studied by chronocoulometry.The study shows that in the presence of TSCthe adsorption of Ni(Ⅱ) at the surface of Hg electrode is direct adsorption of Ni(Ⅱ)-TSCcomplex and the adsorbed species is Ni(Ⅱ)(TSC)22+.The detection limits are 1×10-8 mol/Land 4×10-9mol/Lby linear sweep adsorptive stripping voltammetry and differential pulse adsorptive stripping voltammetry, respectively.

Key words: Nickel, Thiosemicarbazide, Chronocoulometry, Adsorptive voltammetry

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