JA0015 Comparison of Disposable Pipette Extraction and Dispersive Solid-Phase Extraction in the QuEChERS Method for Analysis of Pesticides in Strawberries
来源:Journal of Chromatographic Science
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作者:Virgı´nia C. Fernandes
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发布时间: 2152天前
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2027 次浏览
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In this study, we sought to assess the applicability of GC–MS/MS for the identification and quantification of 36 pesticides in strawberry from integrated pest management (IPM) and organic farming (OF). Citrate versions of QuEChERS (quick, easy, cheap, effective, rugged and safe) using dispersive solid-phase extraction (d-SPE) and disposable pipette extraction (DPX) for cleanup were compared for pesticide extraction. For cleanup, a combination of MgSO4, primary secondary amine and C18 was used for both the versions. Significant differences were observed in recovery results between the two sample preparation versions (DPX and d-SPE). Overall, 86% of the pesticides achieved recoveries (three spiking levels 10, 50 and 200 mg/kg) in the range of 70–120%, with
Introduction
Pesticides are powerful chemicals widely used in current agricultural practices around the world, and it is common that pesticides occur in food products. Nevertheless, pesticides continue to be used because they contribute significantly to the control and elimination of various types of pests and thereby improve food production throughout the world. Organic farming (OF) and integrated pest management (IPM) are ecological approaches to agricultural pest control (1). The use of pesticides is prohibited in OF and strictly limited in IPM. IPM is an approach that relies on current, comprehensive information on the life cycles of pests and their interaction with the environment. OF systems rely on prevention rather than cure. However, the frequency of food pesticide contamination is greater than expected, and pesticide control is required. Increasing public concern about health risks from pesticide residues in the diet has led to strict regulation of maximum residue levels (MRLs) in food (2, 3). There is growing interest in developing simple and reliable methods for the analysis of trace contaminants in fruits and vegetables. Routine and comprehensive testing of multiresidue pesticides is a challenging task because of the presence of large amounts
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Pesticides are powerful chemicals widely used in current agricultural practices around the world, and it is common that pesticides occur in food products. Nevertheless, pesticides continue to be used because they contribute significantly to the control and elimination of various types of pests and thereby improve food production throughout the world. Organic farming (OF) and integrated pest management (IPM) are ecological approaches to agricultural pest control (1). The use of pesticides is prohibited in OF and strictly limited in IPM. IPM is an approach that relies on current, comprehensive information on the life cycles of pests and their interaction with the environment. OF systems rely on prevention rather than cure. However, the frequency of food pesticide contamination is greater than expected, and pesticide control is required. Increasing public concern about health risks from pesticide residues in the diet has led to strict regulation of maximum residue levels (MRLs) in food (2, 3). There is growing interest in developing simple and reliable methods for the analysis of trace contaminants in fruits and vegetables. Routine and comprehensive testing of multiresidue pesticides is a challenging task because of the presence of large amounts
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