CJCU

Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (S1): 306.

• Molecular Spectroscopy • Previous Articles     Next Articles

Study on Color Reaction of 4-(H-acidazo)-l-phenyl-3-ethylpyazolone with Thorium

HUANG Zhang-Jie, TANG Dan-Yu, YANG Guang-Yu, YIN Jia-Yuan   

  1. Department of Chemistry, Yunnan University, Kunming 650091, P. R. China
  • Online:1999-12-31 Published:1999-12-31

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Abstract:

A new reagent 4-(H-acidazo)-l-phenyl-3-methylpyazolone(HPMP) has been synthesized and it color reaction with thorium(Ⅳ) was studied. In the presence of pH=4.6 HAc-NaAc buffer solution and CPB medium. HPMP can reacts with Th(Ⅳ) to form a 2:1 complex. The maximum absorption is at 555nm with molar absorptivity of 2.44×105L.mol-1.cm-1. This method can be applied to the determination of thorium in ores with satisfactory results.

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