Development of reliable analytical method for extraction and separation of thorium(IV) by Cyanex 272 in kerosene |
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Authors: | N S Madane B S Mohite |
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Institution: | (1) Department of Chemistry, Analytical and Environmental Research Laboratory, Shivaji University, Kolhapur, 416004, India |
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Abstract: | A simple and selective spectrophotometric method has been developed for the extraction and separation of thorium(IV) from
sodium salicylate media using Cyanex 272 in kerosene. Thorium(IV) was quantitatively extracted by 5 × 10−4 M Cyanex 272 in kerosene from 1 × 10−5M sodium salicylate medium. The extracted thorium(IV) was stripped out quantitatively from the organic phase with 4.0 M hydrochloric
acid and determined spectrophotometrically with arsenazo(III) at 620 nm. The effect of concentrations of sodium salicylate,
extractant, diluents, metal ion and strippants has been studied. Separation of thorium(IV) from other elements was achieved
from binary as well as multicomponent mixtures such as uranium(VI), strontium(II), rubidium(I), cesium(I), potassium(I), Sodium(I),
lithium(I), lead(II), barium(II), beryllium(II) etc. Using this method separation and determination of thorium(IV) in geological
and real samples has been carried out. The method is simple, rapid and selective with good reproducibility (approximately
±2%). |
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Keywords: | |
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