食品科学 ›› 2004, Vol. 25 ›› Issue (5): 158-160.

• 分析检测 • 上一篇    下一篇

锌还原锡(Ⅳ)磷钼蓝光度法测定锡

 桑宏庆, 黄玉全, 张虎   

  1. 安徽技术师范学院,安徽阜阳美路食业公司
  • 出版日期:2004-05-15 发布日期:2011-10-24

Determination of Tin with Phosphomolybdate Blue Spectrophotometry by Tin (Ⅳ)—Reduced Zinc

 SANG  Hong-Qing, HUANG  Yu-Quan, ZHANG  Hu   

  1. 1.Anhui Normal College of Technology;2.Anhui Fuyang Meilu Food Idustrial Co., Ltd
  • Online:2004-05-15 Published:2011-10-24

摘要: 提出了一种测定食品中锡含量的新方法。方法基于锌可还原Sn4+为Sn2+,而Sn2+可与磷钼酸铵反应生成磷钼蓝,锡在0~20μg/ml内符合比尔定律。检测限和回收率分别可以达到0.001μg/ml 和96.9%~102.06%。

关键词: 锡, 锌, 磷钼蓝, 光度法

Abstract: A new method is presented for the determination of tin in food. The method is based on that zinc can be reduced toSn4+ to Sn2+. The reaction of Sn2+ with phosphomolybdate ammonium formed blue substance on certain conditions. Beer’s lawwas obeyed in the range of 0~20g/ml for tin. The detection limit was 0.001g/ml, and the recovery was 96.9%~102.06%.

Key words: tin, zinc, phosphomolybdate blue, spectrophotometry