MICROEXTRAÇÃO LÍQUIDO-LÍQUIDO DISPERSIVA ASSISTIDA POR VORTEX E ULTRASSOM APLICADA À DETERMINAÇÃO DE AGROTÓXICOS TRIAZINAS, TRIAZINONAS E O TRIAZOL FLUTRIAFOL EM ÁGUA

This study aimed at developing and validating a method for the simultaneous determination of triazines (ametryne, atrazine, prometryne and terbuthylazine), triazinones (metribuzin and hexazinone) and a triazole (flutriafol) in water by ultrasound vortex assisted dispersive liquid-liquid microextraction (USVADLLME) and GC-MS. The experimental conditions that provided the best results were: 5.00 mL of sample, 100 mL of extractor solvent (toluene), vortex agitation for 30 s and sonication for 1 min. at 240 W and 40 ºC. The USVADLLME provided recoveries ranging from 77.2% to 109%, with a repetiti...