Open AccessTrace Determination of Thorium with 6-Chloro-3-hydroxy-2- (2′-furyl)-4H-chromen-4-one as an Analytical Reagent
Author(s) -
Amita Garg
Publication year - 2019
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22222
Subject(s) - chemistry , thorium , reagent , monazite , absorbance , trace amounts , chelation , reproducibility , nuclear chemistry , inorganic chemistry , chromatography , uranium , organic chemistry , medicine , paleontology , materials science , alternative medicine , pathology , metallurgy , biology , zircon
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 satis-factorily applied to the determination of thorium in samples corresponding to Australian monazite in composition.