Table 1.
Colour intensity, free and total SO2, and volatile compounds profile of white wines packed in bottles with two different cork stoppers (natural and Neutrocork) and in bag-in-box (BIB), before filling (Control) and after a storage period of 3, 6 and 12 months
Parameters | Control | Natural cork | Neutrocork | BIB | ||||||
---|---|---|---|---|---|---|---|---|---|---|
3 months | 6 months | 12 months | 3 months | 6 months | 12 months | 3 months | 6 months | 12 months | ||
Colour intensity | 0.070 (0.00)a | 0.077 (0.001)a,b | 0.077 (0.001)a,b | 0.080 (0.001)d,e | 0.076 (0.001)b | 0.076 (0.000)b | 0.079 (0.000)c,d | 0.083 (0.001)f | 0.083 (0.002)e,f | 0.091 (0.003)g |
Free SO2 | 27 (0)f | 25.2 (1.1)e,f | 23.6 (0.5)d,e | 19.8 (2.3)b,c | 23.2 (0.8)b,c | 22.0 (0.0)d,e | 17.2 (1.1)b | 21.0 (2.2)c,d | 22.2 (0.8)c,d | 11.8 (2.3)a |
Total SO2 | 119 (0)e | 114 (1)d,e | 114 (3)d,e | 105 (6)b | 115 (0)d,e | 112 (3)c,d | 106 (2)b,c | 110 (4)b,c,d | 111 (2)b,c,d | 92.4 (4.9)a |
Volatile compounds | ||||||||||
Alcohol (mg/L) | ||||||||||
2-Phenylethanol | 16.6 (0.4)e | 16.2 (1.5)d,e | 13.2 (1.3)c | 9.13 (1.13)b | 16.2 (1.2)d,e | 13.0 (1.6)c | 6.57 (0.59)a | 14.7 (1.6)c,d | 10.2 (1.3)b | 5.54 (0.45)a |
Esters (mg/L) | ||||||||||
2-Phenylethyl acetate | 0.385 (0.024)e | 0.230 (0.034)d | 0.227 (0.011)d | 0.213 (0.014)c,d | 0.228 (0.012)d | 0.236 (0.027)d | 0.170 (0.022)b | 0.225 (0.022)d | 0.189 (0.022)b,c | 0.086 (0.014)a |
Hexyl acetate | 0.600 (0.007)d | 0.305 (0.059)c | 0.282 (0.065)c | 0.179 (0.019)b | 0.170 (0.024)b | 0.138 (0.035)a,b | 0.130 (0.011)a | 0.100 (0.032)a | 0.138 (0.035)a,b | 0.099 (0.006)a |
Isoamyl acetate | 1.67 (0.04)d | 1.53 (0.14)d | 1.13 (0.19)c | 0.874 (0.083)b | 1.20 (0.18)c | 1.15 (0.21)c | 0.520 (0.104)a | 1.26 (0.06)c | 1.07 (0.19)b,c | 0.325 (0.038)a |
Ethyl butanoate | 0.282 (0.020)e | 0.272 (0.046)d,e | 0.178 (0.024)b | 0.164 (0.020)b | 0.236 (0.032)c,d | 0.190 (0.032)b | 0.108 (0.026)a | 0.233 (0.014)c,d | 0.203 (0.035)b,c | 0.080 (0.015)a |
Ethyl hexanoate | 2.63 (0.06)d | 1.81 (0.25)c | 1.16 (0.27)b | 0.805 (0.117)a | 1.33 (0.21)b | 1.02 (0.23)a,b | 0.809 (0.058)a | 1.20 (0.37)b | 1.22 (0.38)b | 0.702 (0.149)a |
Ethyl octanoate | 3.57 (0.77)e | 1.49 (0.20)c | 1.51 (0.22)c | 1.01 (0.15)a,b | 1.24 (0.15)a,b,c | 1.52 (0.11)c | 1.01 (0.07)a,b | 1.95 (0.63)d | 1.32 (0.28)b,c | 0.877 (0.186)a |
Terpenes (µg/L) | ||||||||||
Linalool | 3.91 (0.33)d | 2.93 (0.34)b | 4.03 (0.26)d | 3.20 (0.93)b,c | 3.15 (0.53)b,c | 3.77 (0.66)c,d | 1.19 (0.14)a | 3.17 (0.28)b,c | 3.16 (0.52)b,c | 1.19 (0.14)a |
α-Terpineol | 0.612 (0.010)d | 1.17 (0.07)e | 0.263 (0.236)b,c | 0.301 (0.045)b,c | 1.18 (0.06)e | 0.344 (0.299)c | 0.231 (0.039)b,c | 1.08 (0.03)e | nqa | 0.149 (0.033)a,b |
Norisoprenoid (µg/L) | ||||||||||
β-Damascenone | 0.692 (0.046)f | 0.332 (0.019)d | 0.363 (0.030)d,e | 0.150 (0.016)c | 0.382 (0.010)e | 0.365 (0.032)d,e | 0.015 (0.004)b | 0.335 (0.026)d | 0.055 (0.045)a | 0.060 (0.010)a |
Values in parenthesis are standard deviations from four determinations; values not sharing the same superscript letter (a–g) within the horizontal line are different according to the Tukey test
nq not quantified