1. Determination of Dimethoate in Olive Oil by Adsorptive Stripping Square-Wave Voltammetry
- Author
-
M.D. López Soto, T. Galeano Díaz, J. M. Ortiz, and A. Guiberteau
- Subjects
Detection limit ,chemistry.chemical_compound ,Chromatography ,Stripping (chemistry) ,Chemistry ,Standard addition ,Extraction (chemistry) ,Electrochemistry ,Response surface methodology ,Dimethoate ,Voltammetry ,Analytical Chemistry ,Olive oil - Abstract
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%.
- Published
- 2006