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Speciation of Arsenic(V) and Arsenic(III) in Soil Extracts by Cathodic Stripping Voltammetry
Author(s) -
Kowalska Joanna,
Chałko Katarzyna,
Stryjewska Ewa
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200211)14:21<1508::aid-elan1508>3.0.co;2-6
Subject(s) - arsenic , cathodic stripping voltammetry , chemistry , hanging mercury drop electrode , ascorbic acid , mercury (programming language) , voltammetry , inorganic chemistry , stripping (fiber) , extraction (chemistry) , environmental chemistry , nuclear chemistry , chromatography , electrochemistry , electrode , organic chemistry , materials science , food science , computer science , programming language , composite material
Abstract Cathodic stripping voltammetry with a hanging mercury drop electrode was applied for the determination of As(III) and As(V) in soil extracts. The content of inorganic arsenic(III) and arsenic(V) compounds was determined after chemical reduction of arsenic(V) by KI and ascorbic acid solution, while arsenic(III) was determined in the solution without the reduction. Organic compounds were determined after UV irradiation of the samples. For arsenic compounds extraction three different extractants were tested: water/methanol, ortophosphoric acid and mixture of HCl/HNO 3 . As different arsenic forms have different toxicity, the ability to discriminate between them is a distinct advantage of the proposed method.