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Determination of Dimethoate in Olive Oil by Adsorptive Stripping Square‐Wave Voltammetry
Author(s) -
Díaz T. Galeano,
Guiberteau A.,
Soto M. D. López,
Ortiz J. M.
Publication year - 2006
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.200503453
Subject(s) - dimethoate , stripping (fiber) , olive oil , chromatography , extraction (chemistry) , chemistry , detection limit , voltammetry , adsorptive stripping voltammetry , square wave , pesticide , materials science , electrode , electrochemistry , food science , physics , voltage , quantum mechanics , agronomy , composite material , biology
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%.