Differentiation of Spanish Alcoholic Drinks, Orujo, Obtained from Red and White Grape Pomace Distillation: Volatile Composition

Figures & data

Table 1 Mean concentration (mg L⁻¹) and standard deviation of volatile compounds in distillates from white and red grape pomace. ANOVA results are also showed

Compound	White grape pomace	Red grape pomace
Alcohols
Ethanol (% v/v)	69.7 ± 4.9	68.5 ± 4.6
Methanol	6390 ± 970	4541 ± 1672
2-Butanol	60.6 ± 64.4	9.3 ± 9.2
1-Propanol	269 ± 52.5	292 ± 99.9
2-Methyl-propanol	444 ± 138	692 ± 331
1-Butanol	7.5 ± 1.6	11.3 ± 6.6
2-Methyl-1-butanol*	251 ± 76.9	499 ± 140
3-Methyl-1-butanol*	729 ± 173	1604 ± 446
1-Hexanol*	121 ± 27.2	68.9 ± 19.2
Cis-2-hexen-1-ol	<LD	<LD
Cis-3-hexen-1-ol*	18.5 ± 6.1	6.6 ± 3.8
Trans-3-hexen-1-ol	16.6 ± 24.4	20.0 ± 32.5
Trans-2-hexen-1-ol*	7.1 ± 3.7	2.4 ± 1.6
Allyl alcohol	2.6 ± 0.0	3.9 ± 1.6
Benzyl alcohol	2.1 ± 0.4	1.7 ± 0.9
2-Phenyl-ethanol	12.1 ± 13.7	28.3 ± 13.1
Acetates and esters
Methyl acetate	5.9 ± 4.7	9.5 ± 6.6
Ethyl acetate	551 ± 315	956 ± 438
Isoamyl acetate	12.4 ± 6.3	18.9 ± 10.7
Hexyl acetate	3.7 ± 0.9	25.7 ± 36.9
2-Phenylethylacetate	<LD	<LD
Ethyl butyrate	24.4 ± 30.8	1.4 ± 1.1
Ethyl hexanoate*	15.7 ± 3.3	30.4 ± 14.8
Ethyl octanoate*	24.8 ± 9.4	42.5 ± 19.1
Ethyl decanoate*	22.4 ± 16.8	46.0 ± 15.2
Diethyl succinate	13.6 ± 6.2	33.4 ± 28.9
Ethyl laurate	24.3 ± 18.8	41.4 ± 23.8
Ethyl mirystate	5.4 ± 2.5	9.1 ± 2.2
Ethyl lactate*	725 ± 307	492 ± 312
Aldehydes and acetal
Acetaldehyde	69.0 ± 53.5	103 ± 26.1
1,1-Diethoxyethane	8.6 ± 5.7	16.6 ± 10.7
Furfural	10.6 ± 4.3	14.3 ± 4.0
Benzaldehyde*	4.8 ± 2.1	1.6 ± 0.9
*Indicates that there are significant differences (p < 0.05). <LD: Detection Limit.

Figure 1 Mean and standard deviation of volatile compounds families.

Figure 2 Principal component análisis (PCA) of Orujo spirits volatile composition (color figure available online).