“…12,19 Because of this, green extraction methods have been proposed, including ultrasonic solvent extraction (USE), 14,19 microwave assisted extraction (MAE), 15,16 supercritical fluid extraction (SFE), 20 extraction of the analytes after the shaking of the sample in the presence of an appropriate solvent, followed by solid phase extraction (SPE), 17 headspace solid-phase microextraction (HS-SPME), 21 pressurized liquid extraction (PLE), 1,12,13,22 besides the development of other miniaturized methods as reported in the literature. 14 These methods usually present appropriate results, however some authors have used a less expensive extraction method, based on a simple shaking with solvents of adequate polarity like acetonitrile or methanol and water, providing acceptable recovery values for the extraction of triazine herbicides from soils; 5,8,19 nevertheless, the extraction time is often a drawback, for instance, Mahía et al, 5 and Delgado-Moreno et al, 19 employed 24 h as extraction time. As a result, chemometric studies have been used in order to save time and improve the correlation of the different factors involved in the extraction step for triazines and other pesticides.…”