食品科学 ›› 2005, Vol. 26 ›› Issue (9): 397-400.

• 分析检测 • 上一篇    下一篇

水溶性高聚物萃取分离光度法测定Sn~(4+)的研究

 杜建中, 孙丽文, 邓响平, 黄旭   

  1. 湛江师范学院生命科学与化学学院
  • 出版日期:2005-09-15 发布日期:2011-09-20

Determination of Sn~(4+) with Water-soluble Polymer Extraction by Spectrophotometry

 DU  Jian-Zhong, SUN  Li-Wen, DENG  Xiang-Ping, HUANG  Xu   

  1. Department of Chemistry Zhanjiang Normal College
  • Online:2005-09-15 Published:2011-09-20

摘要: 酸性条件,无机盐存在的下,在聚乙二醇-邻二氮菲-铬天青-S-硫酸铵体系中,将Al3+、Cd2+、Co2+、Cu2+、Hg2+、Ni2+、Fe3+、Zn2+等离子萃取至有机相,将Sn4+保留在水相。利用苯芴酮与锡、CTMAB形成微溶性的橙红色络合物,波长在520nm时,利用分光光度法测定锡的含量。Sn4+含量在0.05~0.60μg/ml范围内符合朗伯比尔定律,摩尔吸光系数=1.05×105L/mol•cm。方法回收率为95%~105%。

关键词: 锡, 高聚物, 分光光度法

Abstract: A extraction-photometric method for determination of Sn4+ in water-soluble polymer was studied. The method in based on the water-soluble polymer solution separated two phases in the presence of inorganic salts. The separation and determination condition of Sn4+ in polyethylene glycol-4000, phenanthroline, chrome azurol S and ammonium sulfate system. The results shows that Sn4+ can be quantitatively separated from the Al3+、Co2+、Cu2+、Fe3+、Hg2+、Ni2+ and Zn2+ system. Stannum is coupled with phenylfuorone, CTMAB fespond and produced orange complex. The Stannum is determined by spectrophotometry. The linear range for determination of Sn4+ is 0.05~0.60μg/ml. The recovery was 95% ~105%.

Key words: stannum, polymer, spectrophotometry