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QuEChERS and solid phase extraction methods for the determination of energy crop pesticides in soil, plant and runoff water matrices

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QuEChERS and solid phase extraction (SPE) methods were applied for determining four herbicides (metazachlor, oxyfluorfen, quizalofop-p-ethyl, quinmerac) and one insecticide (α(±)-cypermethrin) in runoff water, soil, sunflower and oilseed rape plant matrices. Determination was performed using gas chromatography mass spectrometry (GC-MS), whereas high-pressure liquid chromatography mass spectrometry (HPLC-MS) was used for quinmerac. In all substrates linearity was evaluated using matrix-matched calibration samples at five concentration levels (50–1000 ng L−1 for water, 5–500 μg kg−1 for soil and 2.5–500 μg kg−1 for sunflower or oilseed rape plant). Correlation coefficient was higher than 0.992 for all pesticides in all substrates. Acceptable mean recovery values were obtained for all pesticides in water (65.4–108.8%), soil (70.0–110.0%) and plant (66.1–118.6%), with intra- and inter-day RSD% below 20%. LODs were in the range of 0.250–26.6 ng L−1 for water, 0.10–1.8 μg kg−1 for soil and 0.15–2.0 μg kg−1 for plants. The methods can be efficiently applied for field dissipation studies of the pesticides in energy crop cultivations.
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Keywords: QuEChERS; SPE; energy crop pesticides; plants; runoff water; soil

Document Type: Research Article

Affiliations: 1: Faculty of Agricultural Technology, T.E.I. of Epirus, Arta, 47100, Greece 2: Department of Business Administration of Food and Agricultural Products, University of Western Greece, Agrinio, 30100, Greece 3: Analysis Laboratory, Delcof S.A., Naoussa, 58500, Greece 4: Department of Environmental and Natural Resources Management, University of Western Greece, Agrinio, 30100, Greece

Publication date: December 1, 2013

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