CJCU

Chem. J. Chinese Universities ›› 1985, Vol. 6 ›› Issue (11): 980.

• Articles • Previous Articles     Next Articles

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)

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.

TrendMD: