Determination of 20 (S)-ginsengnoside Rh2 in the alkali-hydrolysis product of saponins from leaves of Panax qinquefolium by RP-HPLC / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To determine 20(S)-ginsengnoside Rh2 in the hydrolysis product of saponins from leaves of Panax qinquefolium.</p><p><b>METHOD</b>The separation was performed on ZORBAX EXEND C18 column (4.6 mm x 250 mm, 5 microm), eluted with methanol and water (8515) as mobile phase with the rate of 1.2 mL x min(-1) at 25 degrees C, the wavelength for measurement was 203 nm.</p><p><b>RESULT</b>The calibration curve was linear in the range of 0.5-25 microg for 20(S)-ginsengnoside Rh2(r = 0.9999, n = 7). The average recovery was 99.7% (RSD= 1.0%).</p><p><b>CONCLUSION</b>This method is simple, accurate, reliable and reproducible. The result shows that the transform ratio of 20(S)-ginsengnoside Rh2 is high by this hydrolysis method.</p>