EL-SHEIKH, R., HASSAN, W.S., IBRAHIM, S.H., YOUSSEF, A.M. and GOUDA, A.A. 2020. 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. 12, 5 (Sep. 2020), 103–110. DOI:https://doi.org/10.22159/ijap.2020v12i5.38176.