Gravimetric determination of uranium (VI) and thorium (IV) with substituted pyrazolones

HC Arora, GN Rao

Index: Arora, H. C.; Rao, G. N. Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical & Analytical, 1981 , vol. 20, # 5 p. 539 - 540

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Citation Number: 3

Abstract

4-Acylpyrazolones like 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP), 1-phenyl-3- methyl-4-p-nitrobenzoyl-5-pyrazolone (PMNP) and 1-phenyl-3-methyl-4-(3, 5 dinitrobenzoyl)- 5-pyrazolone (PMDP) have been synthesized and developed as gravimetric reagents for the determination of U (VI) and Th (IV). Uranium (VI) is almost quantitatively precipitated with PMBP, PMNP, and PMDP at pH 2.20, 1.85 and 1.70 respectively. The pH values for the ...