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Chemical Speciation of Antimony(III and V) in Water by Adsorptive Cathodic Stripping Voltammetry Using the 4‐(2‐Thiazolylazo) – Resorcinol
Author(s) -
ElShahawi M. S.,
Bashammakh A. S.,
AlSibaai A. A.,
Bahaffi S. O.,
AlGohani E. H.
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201000505
Subject(s) - antimony , resorcinol , chemistry , hanging mercury drop electrode , cathodic stripping voltammetry , voltammetry , stripping (fiber) , cathodic protection , inorganic chemistry , adsorption , antimony trioxide , nuclear chemistry , analytical chemistry (journal) , electrode , electrochemistry , chromatography , materials science , organic chemistry , fire retardant , composite material
A simple adsorptive cathodic stripping voltammetry method has been developed for antimony (III and V) speciation using 4‐(2‐thiazolylazo) – resorcinol (TAR). The methodology involves controlled preconcentration at pH 5, during which antimony(III) – TAR complex is adsorbed onto a hanging mercury drop electrode followed by measuring the cathodic peak current ( I p,c ) at −0.39 V versus Ag/AgCl electrode. The plot of I p,c versus antimony(III) concentration was linear in the range 1.35×10 −9 –9.53×10 −8 mol L −1 .The LOD and LOQ for Sb(III) were found 4.06×10 −10 and 1.35×10 −9 mol L −1 , respectively. Antimony(V) species after reduction to antimony(III) with Na 2 SO 3 were also determined. Analysis of antimony in environment water samples was applied satisfactorily.