期刊
ELECTROANALYSIS
卷 18, 期 7, 页码 695-702出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200503453
关键词
dimethoate; adsorptive stripping square-wave voltammetry (Ad-SSWV); olive oil
A method for the determination of dimethoate in olive oil by adsorptive stripping square-wave voltammetry has been developed on the base that this pesticide is hydrolyzed in basic media giving rise to an adsorptive-reductive peak at -0.780 V. Extraction of dimethoate from olive oil with ethanol-water and posterior clean-up with C18 cartridges is carried out. Response Surface Methodology has been used for the optimization of the extraction procedure. A matrix effect is observed in olive oil extract; therefore the standard addition method must be used. The detection limit is 19.00 ng g(-1) and recoveries for three levels of fortification are ranged from 79.9% to 104.5%.
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