Table 1. Central composite design and contents of protopanaxadiol ginsenosides for response surface analysis of the acetic acid soaking conditions of taegeuk ginseng
| Exp. No.1) | Acetic acid soaking conditions | Contents of protopanaxadiol ginsenosides (mg/g) |
| Acetic acid conc. (%) | Soaking time (h) | Rb1 | Rb2 | Rb3 | Rc | Rd | Rg3 |
| 1 | 20 | 3.5 | 1.38±0.082) | 0.64±0.02 | 0.08±0.00 | 0.70±0.02 | 0.07±0.00 | 0.42±0.01 |
| 2 | 20 | 1.5 | 2.34±0.12 | 1.34±0.08 | 0.18±0.01 | 1.26±0.09 | 0.14±0.00 | 0.27±0.01 |
| 3 | 10 | 3.5 | 1.40±0.07 | 0.88±0.04 | 0.12±0.00 | 0.90±0.04 | 0.13±0.00 | 0.14±0.00 |
| 4 | 10 | 1.5 | 2.67±0.14 | 1.67±0.11 | 0.23±0.01 | 1.45±0.08 | 0.21±0.01 | 0.23±0.00 |
| 5 | 15 | 2.5 | 2.01±0.08 | 1.24±0.08 | 0.15±0.00 | 1.17±0.06 | 0.17±0.00 | 0.09±0.00 |
| 6 | 15 | 2.5 | 1.91±0.12 | 1.11±0.09 | 0.15±0.00 | 0.99±0.02 | 0.17±0.00 | 0.08±0.00 |
| 7 | 25 | 2.5 | 3.19±0.15 | 2.24±0.12 | 0.26±0.01 | 1.85±0.11 | 0.24±0.00 | 0.27±0.01 |
| 8 | 5 | 2.5 | 2.59±0.09 | 1.38±0.06 | 0.17±0.00 | 1.34±0.09 | 0.20±0.00 | 0.06±0.00 |
| 9 | 15 | 4.5 | 2.14±0.08 | 0.89±0.03 | 0.12±0.00 | 1.07±0.05 | 0.33±0.01 | 0.24±0.00 |
| 10 | 15 | 0.5 | 3.70±0.21 | 2.27±0.14 | 0.26±0.01 | 1.80±0.08 | 0.35±0.01 | 0.02±0.00 |
The number of experimental conditions by central composite design.
Values represent the mean±SD (n=3).