To determine the quality and quantity of the pesticide in samples are usually taken by the extraction of the liquid. (LLE) or extraction (SPE) (2-4), these methods have several steps to prepare the sample and the extraction of substances of interest. Then increase the concentration of the substance by solvent evaporation. As a step to analyze the potential for the loss of this contamination analysis or a sample is the greatest. Although this is a less-aggressive steps in the SPE method, the quantity of the solvent used is smaller than that used for the analysis of fluctuations, LLE may not disappear during the process of evaporation to absorb into the bottle walls can occur, and the dirt that is tracked in the solvent can also concentrate, therefore, it is desirable to limit the number of steps to manage the samples that are relevant to the analysis of any method.
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