有机化学 ›› 1990, Vol. 10 ›› Issue (2): 191-192. 上一篇    

研究论文

微量法测定有机锡化合物中锡的含量

刘惠英;杨大钰   

  1. 武汉大学;湖北公安农药厂
  • 发布日期:1990-04-25

Microdetermination of tin in organotin compounds

LIU HUIYING;YANG DAYU   

  • Published:1990-04-25

本文研究的微量即用混合酸快速分解有机锡化合物以EDTA络合剂和四价锡离子所生成的稳定的Sn^+^4-EDTA络合物为依据, 其过量的EDTA, 用Pb(NO~3)~2,CuSO~4,ZnAc~2akg La(NO~3)~3为滴定剂进行回滴, 均得到的准备的分析结果。此法简单, 快速, 极易掌握操作技术, 滴定剂, 络合剂均为普通试剂, 易得, 价廉, 推广应用方便。

关键词: 络合滴定, 硝酸盐, 镧化合物, 硫酸铜, 微量分析, 硝酸盐, 锡, EDTA, 有机锡化合物, 铅化合物

A simple and rapid method about digestion of organotin compounds is presented. A 15 mL centrifugal tube was used in a sample digestor and a mixture of acids containing perchloric acid was used for digestion. Any one of the four titrants, Pb(NO3)2, Zn(OAc)2, CuSO4 or La(NO3)3, can be used to titrate the tin content with satisfactory accuracy. The absolute error of determination is within ?.3% and the time for treating a sample is about 30 min. Fe3+ and Hg2+ ions interfere.

Key words: LANTHANUM COMPOUNDS, COMPLEXOMETRY, MICRO ANALYSIS, NITRATE, COPPER SULFATE, NITRATE, TIN, ORGANO TIN COMPOUNDS, EDTA, LEAD COMPOUNDS

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