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Vol. 32 No. 2 (2020): Vol 32 Issue 2

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Trace Determination of Thorium with 6-Chloro-3-hydroxy-2- (2′-furyl)-4H-chromen-4-one as an Analytical Reagent

https://doi.org/10.14233/ajchem.2020.22222
Amita Garg
Department of Chemistry, Maharishi Markandeshwar University, Mullana-133207, India

Corresponding Author(s) : Amita Garg

amitagarg2003@gmail.com

Asian Journal of Chemistry, Vol. 32 No. 2 (2020): Vol 32 Issue 2

Abstract

A simple, rapid, highly sensitive and selective method for the spectrophotometric determination of micro amounts of thorium(IV) has been worked out using 6-chloro-3-hydroxy-2-(2′-furyl)-4H-chromen-4-one (CHFC) as a complexing agents in a acidified (CH3COOH, pH 3.5) medium. The yellow complex shows a maximum absorbance at 425-435 nm. The method obeys Beer′s law upto 3.5 μg Th cm-2. As many as 31 cations and 11 anions and/or complexing agents do not interfere. The method has good reproducibility and can be satisfactorily applied to the determination of thorium in samples corresponding to Australian monazite in composition.

Keywords

Thorium 6-Chloro-3-hydroxy-2-(2′-furyl)-4H-chromen-4-one Spectrophotometry
Garg, A. (2019). Trace Determination of Thorium with 6-Chloro-3-hydroxy-2- (2′-furyl)-4H-chromen-4-one as an Analytical Reagent. Asian Journal of Chemistry, 32(2), 228–232. https://doi.org/10.14233/ajchem.2020.22222
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