Abstract
The Deutsche Forschungsgemeinschaft S 19 method is widely used for pesticide multiresidue analysis in crops. It includes a liquid-liquid partition step with dichloromethane, which is undesirable for toxicological and ecological reasons. Therefore, this step was replaced by a solid-phase extraction (SPE) of the diluted acetone extract with a mixture of RP-18-PolarPlus and cyano material, which was afterwards eluted with ethyl acetate. Using this novel approach for extraction, concentration and clean-up, the recovery rates from fruits and vegetables fortified with 0.12–0.48 mg/kg of 31 pesticides with different chemical structures and polarities averaged 80% in most cases, except for some extremely polar compounds. The variation coefficients observed were near 5%. Compared to the partitioning step used hitherto, even higher recoveries were obtained by SPE for non-polar and medium-polar pesticides. In addition, the gas chromatograms often showed fewer interfering peaks from plant coextractives.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Zeitschrift f�r Lebensmitteluntersuchung und -Forschung A
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
