高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (7): 596.

• 研究简报 • 上一篇    下一篇

吸附电位溶出分析法研究

白燕, 周端赐   

  1. 暨南大学化学系
  • 收稿日期:1985-12-25 出版日期:1987-07-24 发布日期:1987-07-24

Studies on Adsorption Potential Stripping Analysis

Bai Yan, Zhou Duanci(Chau Tuanci)   

  1. Department of Chemistry, Jinan University, Guangzhou
  • Received:1985-12-25 Online:1987-07-24 Published:1987-07-24

PDF (PC)

被引次数

8

摘要： 本文以CysH为络合吸附剂,对Cu(Ⅱ)、Sn(Ⅳ)进行吸附电位溶出分析,获得了较高的灵敏度。着重研究了该体系的吸附性质、反应机理;进一步分析了几个体系的电位溶出行为,对吸附机理作了初步探讨。在此基础上提出了吸附电位溶出分析的必要条件,拟定了用电位溶出法测定半胱氨酸的新方法。

Abstract: The potential stripping behaviour of Cu(Ⅱ) and Sn(Ⅳ) in cysteine solution was studied in detail. Sensitivities for the analyses by APSof the two elements in this system may be increased by 1-2 orders of magnitude under optimum conditions (forCu(Ⅱ):0.50M NaCl, pH3.0, 2×10-4M GysH, Ed-0.90V; for Sn(Ⅳ): 0.40M NaNO3, pH2.9, 3×10-4M CysH, Ed-l.10V), with the variation coefficients 2.6% and 1.4% separately.It was observed that with co-existance of Cu(Ⅱ), cysteine also gave well-defined potential stripping waves which may be used to determine cysteins. Uader optimum conditions (0.50M NaNO3, pH2.8, 1×10-5M Cu(Ⅱ), oxidate. Hg(Ⅱ),the transient time(τ) is proportional to cysteine concentration in the range of 2×10-10-1×10-5M, with the variation coefficient 2.5%.

TrendMD: