高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (10): 1358.

• 研究论文 • 上一篇    下一篇

氯化钾介质中铈(Ⅲ)的荧光特性及应用研究

黄承志, 迟锡增   

  1. 北京师范大学化学系, 北京 100875
  • 收稿日期:1992-10-31 修回日期:1993-04-30 出版日期:1993-10-24 发布日期:1993-10-24
  • 通讯作者: 迟锡增.
  • 作者简介:黄承志, 男, 27岁, 博士研究生

Studies on Fluorescent Characteristics and Analytical Application of Cerium(Ⅲ) in Potassium Chloride Medium

HUANG Cheng-Zhi, CHI Xi-Zeng   

  1. Department of Chemistry, Beijing Normal University, Beijing, 100875
  • Received:1992-10-31 Revised:1993-04-30 Online:1993-10-24 Published:1993-10-24

摘要: Ce3+在pH<6.2的KCl介质中受252.4nm的紫外光激发时,发射出的353.8nm荧光可用于痕量铈的测定.在pH5~6时,用Al2(SO4)3可消除Fe3+的干扰.在0~3.0×10-6mol/L范围内,荧光强度与Ce3+的浓度遵守ΔF=2.37×106C—0.001方程(n=10,r=0.9999),检测限为6.0×10-9mol/L.用于GWB07103(GSR-1)岩石成分分析的回收率为95.0%~103.2%,变异系数是4.18%(n=10);用于水系沉积物和土壤标准物质中铈含量分析,结果与标准值无显著差异.

关键词: 铈(Ⅲ), 氯化钾, 荧光分析, 絮凝剂

Abstract: Our research showed that the constant fluorescence of Ce3+ in the medium of KCl with pHlower than 6.2 could be used to determine trace cerium when it was excited at 252.4 nm.Our working acid range is pH 5-6 and the interference of Fe3+ was eliminated by addition of Al2(SO4)3.Over the range of 0- 3.0× 10-5 mol/L Ce3+, the equation of ΔF=2.37× 106C -0.001(n=10, r=0.9999) was abided and the determination limit was 6.0×10-9 mol/L.The recovery and relative standard deviation for GBW07103 rock reference material was 95.0%-103.2% and 4.18(n=10) respectively.The determination results of GBW07402 soil and GBW07311 stream sediment reference material were satisfactory.

Key words: Cerium(Ⅲ), Potassium chloride, Fluorescence analysis, Coagulant

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