Acta Chimica Sinica ›› 1978, Vol. 36 ›› Issue (4): 261-268. Previous Articles     Next Articles

应用离子交换膜于电位滴定中测定硅酸盐玻璃中四价铈

吴正亮, 金文英   

  1. 中国科学院上海光学精密机械研究所
  • 投稿日期:1977-11-04 发布日期:2013-06-03

USING ION-EXCHANGE MEMBRANE IN THE DETERMINATION OF VALENCY STATE OF CERIUM IN SILICATE GLASS BY POTENTIOMETRIC TITRATION

Wu CHENG-LIANG, CHIN WEN-YING   

  1. Shanghai Institute of Optics and Fine Mechanics, Academia Sinica
  • Received:1977-11-04 Published:2013-06-03

A new technique combining ion-exchange membrane with potentiometrio titration was used to determine microquantity of Ce4+ in silicate glass.It extends conventional potontiometrio titration to microquantitalive determination.The derermination oan be carried out at 10-6 N concentration, and the lower limit is down to 1 μg.This method is simple and rapid, and the average deviation is less than 1%.Rapid decomposition of silicate glass is achived in a specially designed sealed vessel made of polytetra,fluoro-ethylene to avoid contamination and the possible oxidation of sample in hydroftuorio acid at 110℃.