Journal
TALANTA
Volume 77, Issue 1, Pages 427-432Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2008.07.005
Keywords
Arsenic compounds; Speciation; HPLC-ICP-MS; Rice flour; Extraction; Microwave-assisted digestion
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Several solvent mixtures and techniques for the extraction of arsenic (As) species from rice flour samples prior to their analysis by HPLC-ICP-MS were investigated. Microwave-assisted extraction using water at 80 degrees C for 30 min provided the highest extraction efficiency. Total recoveries of extracted As species were in good agreement with the total As concentrations determined by ICP-MS after microwave-assisted acid digestion of the samples. Arsenite [As(III)], arsenate [As(V)] and dimethylarsinic acid (DMAA) were the main species detected in rice flour samples. (C) 2008 Elsevier B.V. All rights reserved.
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