EL-SHEIKH, R.; HASSAN, W. S.; IBRAHIM, S. H.; YOUSSEF, A. M.; GOUDA, A. A. GREEN VORTEX-ASSISTED IONIC LIQUID-BASED DISPERSIVE LIQUID-LIQUID MICROEXTRACTION FOR ENRICHMENT AND DETERMINATION OF CADMIUM AND LEAD IN WATER, VEGETABLES AND TOBACCO SAMPLES. International Journal of Applied Pharmaceutics, v. 12, n. 5, p. 103-110, 23 Jun. 2020.