An approach to the application of microwave-assisted micellar extraction and liquid chromatography with ultraviolet detection to the extraction and determination of organophosphorus pesticides in tomato samples.
Microwave-assisted micellar extraction methodology was applied to extract a mixture of 8 organophosphorus pesticides from the cuticle of tomato samples prior to analysis by liquid chromatography with ultraviolet detection. This technique provided very good results and was simple, fast, and environmentally friendly. The pesticides under study were extracted using the nonionic surfactants polyoxyethylene 10 lauryl ether (POLE) and oligoethylene glycol monoalkyl ether (Genapol X-080). The optimal extraction variables to be applied were determined for each surfactant and then compared. POLE proved to be the most suitable for the extraction, with recoveries over 70% in the majority and relative standard deviation values under 4.8%. After validation using a tomato sample enriched with a certified mixture, the proposed method was applied to the analysis of organophosphorus pesticides in lettuce and pepper samples.
Padrón-Sanz
Carolina
C
University of Las Palmas de Gran Canaria, Faculty of Marine Sciences, Department of Chemistry, 35017 Las Palmas de Gran Canaria, Spain.
Sosa-Ferrera
Zoraida
Z
Santana-Rodríguez
Jose J
JJ
D002138:Calibration; D002212:Capsicum / Q000737:chemistry; D002853:Chromatography, Liquid / Q000379:methods*; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D018545:Lactuca / Q000737:chemistry; D018551:Solanum lycopersicum / Q000737:chemistry*; D008872:Microwaves; D009943:Organophosphorus Compounds / Q000032:analysis*; D010575:Pesticides / Q000145:classification* / Q000302:isolation & purification*; D012680:Sensitivity and Specificity; D013501:Surface-Active Agents / Q000737:chemistry; D013997:Time Factors; D014466:Ultraviolet Rays
D009943:Organophosphorus Compounds; D010575:Pesticides; D013501:Surface-Active Agents