Study on Color Reaction of 4-(H-acidazo)-l-phenyl-3-ethylpyazolone with Thorium |
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| Authors: | HUANG Zhang-Jie TANG Dan-Yu YANG Guang-Yu YIN Jia-Yuan |
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| Affiliation: | Department of Chemistry, Yunnan University, Kunming 650091, P. R. China |
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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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