Solvent extraction separation of thorium as picrate complex with 18-crown-6

Thorium was quantitatively extracted from 0.04M picric acid with 0.065M of 18-crown-6 at pH 2.0-3.5. It was stripped from organic phase with 0.5M nitric acid and was determined spectrophotometrically at 655 nm as its Arsenazo-III complex. Thorium was separated from mixture containing Ce, uranium, Zr...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 1989-12, Vol.134 (2), p.437-443
Main Authors: DEORKAR, N. V, KHOPKAR, S. M
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Inorganic chemistry and origins of life
Kinetics and mechanism of reactions
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Summary:Thorium was quantitatively extracted from 0.04M picric acid with 0.065M of 18-crown-6 at pH 2.0-3.5. It was stripped from organic phase with 0.5M nitric acid and was determined spectrophotometrically at 655 nm as its Arsenazo-III complex. Thorium was separated from mixture containing Ce, uranium, Zr, Hf, yttrium and Pb in complex mixtures. The method was extended for the analysis of Th in monazite. Graphs. 10 ref.--AA
ISSN:0236-5731
1588-2780
DOI:10.1007/BF02278281