1. Introduction
The generic term “pesticide” identifies a wide spectrum of synthetic compounds with biocide activity used to remove weeds, fungi and insects to increase agricultural productivity [1]. The toxicity of pesticides and their corresponding harmful environmental effects are increasingly evident and have aroused interest in the identification and quantification of such compounds in various matrices, such as juices [2], vegetables [3], fruits [4], milk [5], soils [6] and water [1], [6] and [7]. Thus, it is of paramount importance to develop faster and more selective analytical methodologies with lower cost-benefit ratios that are less harmful to the environment and more sensitive to trace levels of pesticide residues in various matrices including natural and drinking waters [7] and [8].