化学学报 ›› 1964, Vol. 30 ›› Issue (4): 406-411. 上一篇    下一篇

论文

钍的分析化学 Ⅱ.用碘酸高铈共沉淀法分离痕量钍

嚴仁蔭, 朱貴云   

  1. 北京大学化学系
  • 投稿日期:1963-12-26 发布日期:2013-06-03

ANALYTICAL CHEMISTRY OF THORIUM Ⅱ. SEPARATION OF TRACE AMOUNTS OF THORIUM BY COPRECIPITATION WITH CERIC IODATE

YEN JEN-YIN, ZHU GUEI-YUN   

  1. Department of Chemistry, Peking University
  • Received:1963-12-26 Published:2013-06-03

用偶氮肿Ⅰ光度法及Th234示踪法证明,自15-50毫升0.5-1.0N硝酸溶液中,由3-5毫克铈所生成的碘酸高铈可共沉淀0.1-50微克钍。溶液体积较大时,在滤液中再加3毫克高铈离子进行第二次共沉淀,仍可得定量分离。大多数常见离子与希土元素不干扰。此法特别适用于大量希土存在时痕量钍的分离。有较多的钛、锆、锡时,可将沉淀溶解,沉淀草酸铈以浓集钍,而与钛、锆、锡等分离。溶解沉淀井还原高鈰离子后,可以用偶氮胂Ⅰ光度法测定钍。用此法分析几种试样的结果,与对照分析的结果相符。

Judging from the closeness of ionic radii of ceric and thorium ions, a method is proposed for the concentration of traces of thorium by coprecipitation with ceric iodate. By means of Th234 as a tracer and photometric determination with arsenazo Ⅰ, it is shown that quantitative recovery of thorium can be achieved.