1. Rapid pesticide analysis, in post-harvest plants used as animal feed, by low-pressure gas chromatography-tandem mass spectrometry.
- Author
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Garrido-Frenich A, Arrebola FJ, González-Rodríguez MJ, Vidal JL, and Díez NM
- Subjects
- Calibration, Citrullus chemistry, Cucumis chemistry, Environmental Pollutants analysis, Fabaceae chemistry, Plant Leaves chemistry, Plant Stems chemistry, Pressure, Reproducibility of Results, Sensitivity and Specificity, Spain, Time Factors, Animal Feed analysis, Gas Chromatography-Mass Spectrometry methods, Pesticides analysis, Plants chemistry
- Abstract
A 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.
- Published
- 2003
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