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An improved HPLC method for quantitative determination of six triterpenes in Centella asiatica extracts and
B T Schaneberg1, J R Mikell, E Bedir
1National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, MS 38677, USA.
Abstract:
An improved HPLC qualitative and quantitative method of six triterpenes (asiaticoside, madecassoside, asiatic acid, madecassic acid, terminolic acid, and asiaticoside-B) in Centella asiatica (raw plant material and preparations) is described in this paper. After 50 minutes the six active triterpenes were separated and detected in the methanolic extract at a limit of 0.01 microg/ml. The method uses a Phenomenex Aqua 5mu C18 (200 A) column as the stationary phase, a gradient mobile phase of water (0.1% TFA), acetonitrile (0.1% TFA), and methyl tert-butyl ether (0.1% TFA), and UV detection at 206 nm. The correlation coefficients for the calibration curves and the recovery rates ranged from 0.995 to 0.999 and from 98.39% to 100.02%, respectively. The qualitative and quantitative results are discussed.
