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HPLC analysis of ginsenosides in unsteamed and steamed American ginseng roots. Chromatograms of unsteamed (A), or steamed at 120 °C for 2 h (B) and 4 h (C) are shown. Ginsenoside peaks: (1) Rg1, (2) Re, (3) Rh1, (4) Rg2, (5) 20R-Rg2, (6) Rb1, (7) Rc, (8) Rb2, (9) Rb3, (10) Rd, (11) Rg3, (12) Rh2. Peak numbers are not shown if the saponins were not detected.
