Table 6. Change of fusel oils in storege vessel during maturation period of Vitis coignetiae brandy
(unit: mg/L)
| Maturation period (month) | Isobutanol | Isoamyl alcohol | a/b ratio2) |
| Oak | Stainless | Glass | Oak | Stainless | Glass | Oak | Stainless | Glass |
| 0 | 281.01±0.001) | 281.01±0.00 | 281.01±0.00 | 898.33±0.01 | 898.33±0.01 | 898.33±0.01 | 3.20±0.04 | 3.20±0.04 | 3.20±0.04 |
| 3 | 287.43±0.01 | 276.22±0.01 | 259.87±0.01***3) | 905.86±0.04 | 873.50±0.04 | 822.51±0.02**** | 3.15±0.02 | 3.16±0.03 | 3.17±0.06 |
| 7 | 314.73±0.00 | 269.65±0.00 | 270.34±0.00 | 1,007.16±0.00 | 859.49±0.00 | 860.04±0.00* | 3.20±0.06 | 3.19±0.00 | 3.18±0.00 |
| 11 | 504.19±0.06**** | 276.74±0.00 | 276.86±0.00 | 1,642.08±0.20**** | 876.83±0.00 | 876.49±0.01 | 3.26±0.01 | 3.17±0.02 | 3.18±0.06 |
| 17 | 687.88±0.01**** | 272.13±0.00 | 268.99±0.00* | 1,605.57±0.01**** | 864.75±0.00 | 880.74±0.00 | 2.33±0.05 | 3.18±0.02 | 3.27±0.02 |
Each value is expressed as mean±SD (n=3).
Ratio = Isoamyl alcohol/Isobutanol.
*p<0.05, **p0.01, ***p<0.001, ****p<0.0001.