High-performance liquid chromatographic method for the determination of mangiferin, likviritin and dihydroquercetin in rat plasma and urine.

The use of reversed-phase high-performance liquid chromatography for the determination of the biologically active plant phenolic compounds mangiferin, likviritin and dihydroquercetin is described. Perchloric acid (35%) was used for deproteinization in the case of mangiferin and likviritin, and acidified methanol for dihydroquercetin. Detection was performed at 254, 275 and 290 nm for mangiferin, likviritin and dihydroquercetin in plasma, and 365, 312 and 290 nm in urine, respectively.

Simple high-performance liquid chromatographic method for the determination of a new phytochemical drug, fellavine, and its metabolites in human and rat plasma and urine.

The use of a small precolumn instead of an injection loop for the determination of a new phytochemical drug, fellavine, and its metabolites is described. The method combines the direct injection of plasma and urine into the reversed-phase precolumn with separation on a Spheri-5 RP-18 analytical column. Different sorbents in the precolumn were compared.