Table 2.
Concentration of major mineral elements (mg/l) of red winesa after 6 months of aging in oak barrels, according to barrel type (cooperage and toasting level) and barrel replicate.
| Red wine A Touriga Nacional | Red wine B Touriga Nacional | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Element | Barrel | Barrel | Barrel | |||||||
| replicate | replicate | replicate | ||||||||
| effect | A-XM+(1) | A-XM+(2) | effect | B-YM+(1) | B-YM+(2) | effect | B-ZM(1) | B-ZM(2) | ||
| Na | nsb | 15 (2) | 12 (2) | ns | 13 (4) | 13 (10) | ns | 12 (9) | 12 (1) | |
| Mg | ns | 94 (2) | 96 (2) | ns | 95 (1) | 93 (1) | ns | 89 (4) | 85 (2) | |
| K | ns | 1293 (1) | 1296 (0) | ns | 1393 (1) | 1400 (1) | ns | 1400 (1) | 1389 (1) | |
| Ca | ns | 58 (1) | 60 (2) | ns | 52 (1) | 54 (2) | ns | 55 (3) | 53 (2) | |
| Fe | ns | 1.15 (0.01) | 1.14 (0.01) | ∗∗ | 1.82 (0.01) a | 1.28 (0.00) b | ns | 1.35 (0.00) | 1.35 (0.00) | |
aA-XM+(1), wine A aged in medium plus toasting barrel from cooperage X replicate 1; A-XM+(2), wine A aged in medium plus toasting barrel from cooperage X replicate 2; B-YM+(1), wine B aged in medium plus toasting barrel from cooperage Y replicate 1; B-YM+(2), wine B aged in medium plus toasting barrel from cooperage Y replicate 2; B-ZM(1), wine B aged in medium toasting barrel from cooperage Z replicate 1; B-ZM(2), wine B aged in medium toasting barrel from cooperage Z replicate 2. bns: not significant effect; ** significant effect (p < 0.01). Results expressed in mg/l correspond to the mean of three analytical replicates with corresponding standard deviation (in brackets). Statistical treatment was performed independently for the three barrel types.
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