Fig. 5From: Preparative HPLC for large scale isolation, and salting-out assisted liquid–liquid extraction based method for HPLC–DAD determination of khat (Catha edulis Forsk) alkaloidsSuperimposed HPLC–DAD chromatograms obtained for: a spiked and unspiked samples extracted with SALLE, and pure standards (60, 60, and 30 µg/mL respectively of norephedrine, cathine and cathinone) and b sample extracted with SALLE and UAE–SPE methodsBack to article page