A new spectrophotometric method for the determination of cerium using leuco disulphine blue

Revanasiddappa, H. D. and Kiran Kumar, T. N. (2003) A new spectrophotometric method for the determination of cerium using leuco disulphine blue. Journal of Analytical Chemistry, 58 (10). pp. 922-926. ISSN 1608-3199

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Abstract

A new, simple, highly sensitive spectrophotometric method for the determination of trace amounts of cerium(IV) is described. The method is based on the oxidation of leuco disulphine blue (LDSB) to its blue form of disulphine blue by Ce(IV) in a sulfuric acid medium (pH 1.3--3.0); the absorbance of the formed dye is measured in an acetate buffer medium (pH 3.0--4.8) at 635 nm. The color system obeys Beer's law in the concentration range from 0.5 to 5.5 μg mL--1 cerium with a molar absorptivity of 1.75 × 104 L mol--1 cm--1 and a Sandell's sensitivity of 0.008 μg cm--2. All variables were studied in order to optimize the reaction conditions. The developed method has been successfully applied to the determination of cerium in high purity rare-earth oxides, soil, natural water, plant tissue, human hair, and rock samples.

Item Type:	Article
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	LA manjunath user
Date Deposited:	06 Sep 2019 06:26
Last Modified:	06 Sep 2019 06:26
URI:	http://eprints.uni-mysore.ac.in/id/eprint/7680

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