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Column chromatographic separation of thorium(IV) from ascorbic acid medium using poly-(dibenzo-18-crown-6)

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Abstract

A simple separation method has been developed for thorium(IV) using poly-(dibenzo-18-crown-6) and column chromatography. The separation was carried out from ascorbic acid medium. The adsorption of thorium(IV) was quantitative from 0.001-0.01M ascorbic acid. The elution of thorium(IV) was quantitative with 4.0-8.0M HCl, 3.0-6.0M HClO4, 4.0-8.0M H2SO4 and 1.0-8.0M HBr. The capacity of poly-(dibenzo-18-crown-6) for thorium(IV) was found to be 1.379±0.01 m.mol/g of crown polymer. Thorium(IV) was separated from a number of cations in binary as well as in multicomponent mixtures. The method was extended to the determination of thorium in monazite sand. It is possible to separate and determine 5 ppm of thorium(IV) by this method. The method is very simple, rapid, selective and has good reproducibility (approximately ±2%).

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References

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Authors and Affiliations

  1. Environmental Analytical Chemistry Laboratory, Department of Chemistry, Shivaji University, Kolhapur, 416 004, India

    B. S. Mohite & A. S. Jadhav

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  1. B. S. Mohite
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  2. A. S. Jadhav
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Mohite, B.S., Jadhav, A.S. Column chromatographic separation of thorium(IV) from ascorbic acid medium using poly-(dibenzo-18-crown-6). Journal of Radioanalytical and Nuclear Chemistry 256, 173–176 (2003). https://doi.org/10.1023/A:1023389101671

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  • DOI: https://doi.org/10.1023/A:1023389101671

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