Rapid pesticide analysis, in post-harvest plants used as animal feed, by low-pressure gas chromatography–tandem mass spectrometry
A. Garrido-Frenich, F. J. Arrebola, M. J. González-Rodríguez, J. L. Martínez Vidal and N. Mora Díez
Analytical and Bioanalytical Chemistry 377 (6): 1038-1046. 2003.
2003
บทคัดย่อ
Rapid pesticide analysis, in post-harvest plants used as animal feed, by low-pressure gas chromatography–tandem mass spectrometryA wide range of pesticides used to control pests in vegetables have been determined in agricultural plant waste from beans, watermelons, and melons grown in greenhouses located in a predominantly agricultural area in Southeast Spain (Almería). Analysis of the pesticides was carried out by low-pressure gas chromatography (LP-GC) with mass spectrometry in tandem (MS–MS) mode, after extraction of the lyophilized samples with dichloromethane. The influence of the sample matrix on the analysis was avoided by use of matrix-matched standards. Linearity, detection limit (LOD), quantitation limit (LOQ), recovery, and precision for each pesticide were calculated. The most frequently encountered pesticides were endosulfan (>73% of the analyzed samples) and buprofezin (>55% of the samples), followed by cypermethrin, pirimifos-methyl, bifentrin, and chlorpyrifos (>30% of the samples). The pesticide found at the highest concentration level was endosulfan (223.33 mg kg–1) in a watermelon sample.