PH-zone-refining counter-current chromatography with a hydrophilic organic/salt-containing two-phase solvent system for preparative separation of polar alkaloids from natural products
Keywords: کروماتوگرافی ضد جریان کربن پالایش pH-منطقه; PH-zone-refining counter-current chromatography; Hydrophilic organic/salt-containing two-phase solvent system; Polar alkaloids; Toad venom;