A Systematic Approach To Optimize Solid-Phase Microextraction. Determination of Pesticides in Ethanol/Water Mixtures Used as Food Simulants
- 6 May 1999
- journal article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 71 (13) , 2417-2422
- https://doi.org/10.1021/ac990026c
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).Keywords
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