alexa A systematic approach to optimize solid-phase microextraction. Determination of pesticides in ethanol water mixtures used as food simulants.


Chemical Sciences Journal

Author(s): Batlle R, Snchez C, Nern C

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Abstract The optimization of solid-phase microextraction (SPME) of several organochlorine and organophosphorus pesticides is presented, and the influence of variables is discussed. The optimized method is applied to several selected ethanol/water mixtures used as food simulants, and the influence of the ethanol content on the SPME performance is also discussed. Detection limits ranging from 0.02 to 0.04 ng/g for water simulant and from 38.7 to 205.5 ng/g for 95\% ethanol simulant were obtained. The relative standard deviation (\% RSD) was <20\% in all cases. The optimized method is compared with classical liquid-liquid extraction (LLE). This article was published in Anal Chem and referenced in Chemical Sciences Journal

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