Table 1.
Compounds | Evolution During Bottle Aging | References | |||
---|---|---|---|---|---|
Increase | Decrease | ||||
Volatile | Volatile Sulphide | H2S | may increase or decrease | [11,22,50,51] | |
MeSH | may increase or decrease | [55] | |||
EtSH | |||||
Higher Alcohols | 3-methylbutanol | generally stable, but small amounts may decrease | [24] | ||
isoamyl alcohol | stable | [56] | |||
2-phenylethanol | stable | ||||
isobutanol | stable | [12] | |||
Hexanol | stable | ||||
cis-3-hexen-1-ol | stable | ||||
1,3-butanediol | steadily decreased | [12,57] | |||
Aldehydes | acetaldehyde | * | [7,39] | ||
formaldehyde | increase when oxidation is out of balance | [7,32] | |||
2-methylbutyral | |||||
phenylacetaldehyde | |||||
isobutyral | |||||
isoamental | |||||
Esters | isoamyl acetate | * | [56] | ||
hexyl acetate | * | ||||
cis-3-hexyl acetate | * | ||||
isobutyl acetate | * | ||||
2-phenylethyl acetate | * | ||||
ethyl hexanoate | * | [12,57,58] | |||
octanoate | * | ||||
decanoate | * | ||||
octanoic | * | ||||
decanoic | * | ||||
hexanoic | * | ||||
3-mercaptohexanol acetate | * | [56] | |||
nonalactone | * | [65] | |||
γ-hexalactone | can be detected in heated wines | [66] | |||
γ-decalactone | |||||
lactones | overall stable | [69] | |||
Methoxypyrazines | 3-isobutyl-2-methoxypyrazine | * | [14,72] | ||
3-isopropyl-2-methoxypyrazine | * | ||||
sec-butyl-2-methoxypyrazine | * | ||||
Other Volatile Compounds | volatile phenols | increase or decrease | [15,73] | ||
hexanoic | * | [12] | |||
decanoic | * | ||||
octanoic | * | ||||
Non-volatile | Tannins | (+)-catechin | * | [74] | |
(−)-epicatechin | * | ||||
Tartaric Acid | * | [15] | |||
Polysaccharides | Mannoproteins (MP) | * | [36,75] |