应用化学 ›› 1986, Vol. 0 ›› Issue (1): 69-72.

• 研究论文 • 上一篇    下一篇

在两性表面活性剂存在下,5-Cl-PADAB分光光度测定铝合金中的镍

朱有瑜, 王耕   

  1. 杭州大学化学系
  • 收稿日期:1985-03-04 修回日期:1985-06-03 出版日期:1986-02-10 发布日期:1986-02-10
  • 通讯作者: 朱有瑜

SPECTROPHOTOMETRIC DETERMINATION OF NICKEL WITH 5-Cl-PADAB IN THE PRESENCE OF AMPHOTERIC SURFACTANT

Zhu Youyu, Wang Geng   

  1. Department of Chemistry, Hangzhou University
  • Received:1985-03-04 Revised:1985-06-03 Published:1986-02-10 Online:1986-02-10

摘要: 用5-Cl-PADAB作为测定钴、钯的灵敏试剂已有报导,作者曾用5-Cl-PADAB在表面活性剂存在下,对Ag+的协同增色作用作了研究,并用以测定微量银,获得良好结果。本文研究了在阴、非离子两性表面活性剂AES(烷基聚乙二醇醚硫酸酿)存在下,利用镍与5-Cl-PADAB生成红紫色络合物的吸收光谱,拟定出直接光度测定镍的方法。该体系具有显色速度快,络合物稳定性好,灵敏度较高(ε537=8.1×104),操作简便等优点。用NaF-酒石酸钾钠-硫脲作掩蔽剂,该法用于直接测定铝合金中的微量镍,结果颇为满意。

Abstract: A simple, rapid and sensitive spectrophotometric method for the determination of ni-ckel was described. It is based on the formation of a red violet complex between Ni(Ⅱ) and 5-Cl-PADAB in the presence of an amphotoric surfactant AES at pH 7.4—8.4, Beer's law is obeyed in the range of 0—15 μgNi/25ml. The molar ratio of Ni(Ⅱ) to 5-Cl-PADAB in the complex has been established as 1:2. The interference from metal ions was exa-mined.