高等学校化学学报

高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (9): 783.

• 研究简报 • 上一篇    下一篇

利用新的指示反应催化光度测定痕量银

郭安城1, 张振辉2, 阮大文2   

  1. 1. 山西大学;
    2. 江西大学
  • 收稿日期:1985-05-04 出版日期:1986-09-24 发布日期:1986-09-24

The Photometric Determination of Trace Silver by Catalytic Method with a New Indicator Reaction

Guo Anchen1, Zhang Zhenhui2, Yuan Dawen2   

  1. 1. Shanxi University, Taiyuan;
    2. Jiangxi University Nanchang
  • Received:1985-05-04 Online:1986-09-24 Published:1986-09-24

PDF (PC)

被引次数

8

摘要： 催化动力学分析法测定痕量银的报导相对较少,至今仅二十多篇[1-4],其中大多数是以过硫酸盐作氧化剂。用H2O2作氧化剂的体系文献报导很少[5]。本文在实验基础上,发现在Na3PO4-Na2PO4介质中,银能催化H2O2氧化硫酸对氨基二乙基苯胺,得紫红色产物,其颜色随时间延长而加深,反应速度在一定范围内随银用量增大而加速。本文研究了一系列反应条件之后,拟定出了催化光度测定痕量银的分析方法。

Abstract: Suitable conditions for the determination of trace silver by using a new indicator reaction on the basis of the oxidation of p-amino-N,N-diethylaniline sulphate with hydrogen peroxide catalyzed by silver itself are studied in this article.The apparent activation energies of the catalytic and uncatalytic reactions were calculated.The method has been applied to the determination of silver in various geological samples with satisfactory results after separation by extraction with dithizone.

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