Automated determination of pesticide residues in olive oil by on-line reversed-phase liquid chromatography-gas chromatography using the through oven transfer adsorption desorption interface with electron-capture and nitrogen-phosphorus detectors operating simultaneously.
A rapid method for the multiresidue analysis of pesticides in olive oil is presented. Pesticides are analyzed by on-line coupling reversed-phase liquid chromatography-gas chromatography using the through oven transfer adsorption desorption (TOTAD) interface with subsequent simultaneous electron-capture and nitrogen-phosphorus detection by post-column splitter. An autosampler is employed and the olive oil is simply filtered before the chromatographic analysis. Organophosphorus, organochlorine and triazine pesticides are determined in one run. The limits of detection are below the required maximum residue levels and calibration curves are linear in the range tested. Repeatabilities (intra-day and inter-days) are good. The method was satisfactory applied to the routine analysis of numerous olive oil samples.
Díaz-Plaza
Eva M
EM
Escuela Técnica Superior de Ingenieros Agrónomos, Universidad de Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain.
Cortés
Jose M
JM
Vázquez
Ana
A
Villén
Jesús
J
D000327:Adsorption; D001331:Automation; D002849:Chromatography, Gas / Q000295:instrumentation* / Q000379:methods*; D002853:Chromatography, Liquid / Q000295:instrumentation* / Q000379:methods*; D004583:Electrons; D009584:Nitrogen; D000069463:Olive Oil; D009862:Online Systems; D010573:Pesticide Residues / Q000032:analysis*; D010758:Phosphorus; D010938:Plant Oils / Q000737:chemistry*; D015203:Reproducibility of Results
D000069463:Olive Oil; D010573:Pesticide Residues; D010938:Plant Oils; D010758:Phosphorus; D009584:Nitrogen