Answers are grounded in this paper and cite their sources.
High-speed countercurrent chromatography was used for the prefractionation of flavonoids from the crude extracts of Pericarpium citri reticulatae, Radix puerariae, Radix glycyrrhizae, Radix scutellariae, and Flos genkwa. All separations were performed only with a two-phase system composed of CHCl3 : CH3OH :H2O=4 : x : 2. The x was changed for each sample between 2.5∼4.5. The fractionated components were identified by thin-layer chromatography, which confirmed this solvent system was versatile and very useful for prefractionation of flavonoids.
No takes yet. Share an insight, caveat, or question.
Yuan et al. (2002) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: