高等学校化学学报

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (11): 980.

• 研究简报 • 上一篇    下一篇

铀-4,5-二溴苯基萤光酮-吐温-60显色体系的分光光度法研究

王东进1, 肖子敬1, 吴培任1, 潘庆洪2   

  1. 1. 福州大学化学系;
    2. 中山大学化学系
  • 收稿日期:1984-07-04 出版日期:1985-11-24 发布日期:1985-11-24

Sensitive Spectrophotometric Determination of Uranium(Ⅵ)with 4,5-Dibromophenylfluorone and Tween-60

Wang Dongjin1, Xiao Zijing1, Wu Peiren1, Pan Qinhong2   

  1. 1. Department of Chemistry, Fuzhou University, Fuzhou;
    2. Department of Chemistry, Zhongshan University, Guangzhou
  • Received:1984-07-04 Online:1985-11-24 Published:1985-11-24

PDF (PC)

被引次数

10

摘要： 铀的高灵敏高选择性的光度法尚少见。最近有人合成过二溴苯基萤光酮(下简称Br-PF),但未见用于测定铀的报导。为此,本文研究了在吐温-60存在下用Br-PF测定铀的条件,结果表明,本法的灵敏度较高(ε=1.79×105),是迄今为止铀最灵敏的显色反应(见表1)。采用三辛胺(TOA)萃取分离铀,并用于岩矿中铀的测定。

Abstract: Ahighly sensitive method for spectrophotomctric determination of uranium(Ⅵ) has been developed. Uranium(Ⅵ) reacts with 4, 5-dibromophenylfluorne(Br-PF) in the prcsence of Tween-60 to form a red-violet coloured complex with molar ratio of Uto Br-PF 1:3 at pH6.5-9.0. The apparent molar absorptivity of the complex is 1.79 × 105 L. mol-1. cm-1 at 565nm. Beer's law is obeyed in the range of 0-5μg U(Ⅵ)/10ml. Metal ions interference can be eliminate by a preliminary extraction of U(Ⅵ) with trioctylamine from 4.5N HCl. This method has been applied to determination uranium in ores with satisfactory results.

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