To determine the quality and quantity of pesticides in water samples are usually taken by the extraction of the liquid. (LLE) or extraction (SPE) (2-4) how many of these procedural steps required to prepare the sample and the extraction of substances to achieve a limitation of auditing required step concentration (volatile solvent) It is a step in the analysis of 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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