Development of a Method for Chromium Speciation by Selective Solid Phase Extraction and Preconcentration on Alumina-Functionalized Thiosemicarbazide

A speciation method is developed for Cr(III) and Cr(VI) at selected medium pH range via solid phase extraction on three designed and synthesized chelating inorganic solid sorbents based on adsorption of thiosemicarbazide, as the nitrogen and sulfur containing chelating compound, on alumina surface [...

Full description

Saved in:
Bibliographic Details
Published in:Journal of liquid chromatography & related technologies 2008-01, Vol.31 (16), p.2475-2492
Main Authors: Mahmoud, Mohamed E., Yakout, Amr A., Ahmed, Somia B., Osman, Maher M.
Format: Article
Language:English
Subjects:
Alumina
Analysis methods
Analytical chemistry
Applied sciences
Chemistry
Chromium
Drinking water and swimming-pool water. Desalination
Exact sciences and technology
Natural water pollution
Pollution
Solid phase extraction
Speciation
Spectrometric and optical methods
Thiosemicarbazide
Water treatment and pollution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A speciation method is developed for Cr(III) and Cr(VI) at selected medium pH range via solid phase extraction on three designed and synthesized chelating inorganic solid sorbents based on adsorption of thiosemicarbazide, as the nitrogen and sulfur containing chelating compound, on alumina surface [Al-TSC (I-III)]. The influence of various parameters including medium pH, time of contact, and interference of matrix and coexistent elements on the speciation and selective extraction processes of chromium species are studied and evaluated on the basis of determination of the metal adsorption capacity, distribution coefficient, and separation factor. Quantitative recovery of Cr(VI) was accomplished by [Al-TSC (I-III)] at pH = 1.0, while Cr(III) was found to be recovered on these sorbents at pH = 7.0 with minimal or no interference between these two species under the studied buffering conditions. The proposed method has been successfully applied for speciation, selective extraction, and preconcentration of Cr(III) and Cr(VI) in water samples with a preconcentration factor of 200.
ISSN:1082-6076
1520-572X
DOI:10.1080/10826070802319750