. 2020 Aug 25;58(6):2295–2303. doi: 10.1007/s13197-020-04740-8

Table 3.

Volatile compounds concentration in 85 PA, 95 PA and 100 PA beer samples

Compounds	Flavour	85 PA	95 PA	100 PA
1-Propanol (mg/L)	Alcohol	20.86 ± 0.55^a	31.28 ± 1.08^b	28.91 ± 0.02^c
2-Methyl-Propanol (mg/L)	Alcohol	82.67 ± 1.53^b	82.52 ± 0.78^b	69.82 ± 0.14^a
3-Methyl-Butanol (mg/L)	Alcohol, banana, sweetish, aromatic	59.84 ± 0.47^a	80.86 ± 0.52^b	70.88 ± 0.80^c
2-Methyl-Butanol (mg/L)	Alcohol, solvent, banana	23.22 ± 0.24^a	30.38 ± 0.54^c	25.55 ± 0.35^b
Phenyl Ethanol (mg/L)	Rose, sweetish, perfumed	53.83 ± 7.42^a	69.76 ± 2.72^b	73.47 ± 8.06^c
Furfuryl alcohol (mg/L)	Sugar cane, wood	2.94 ± 0.11^b	2.28 ± 0.09^a	2.03 ± 0.20^a
Sum of higher alcohols (mg/L)		243.35 ± 10.31^a	297.08 ± 5.73^b	270.65 ± 9.57^c
Ethyl Acetate (mg/L)	Solvent, fruity, sweetish	7.59 ± 0.23^a	31.77 ± 2.27^b	32.80 ± 0.05^b
Ethy Butirrate (mg/L)	Butter, apple	0.03 ± 0.00^a	0.09 ± 0.00^b	0.11 ± 0.01^c
Isoamyl Acetate (mg/L)	Banana, apple, solvent, estery	0.29 ± 0.01^a	1.75 ± 0.04^b	1.76 ± 0.06^b
Ethyl Esanoate (mg/L)	Sour apple	0.07 ± 0.00^a	0.15 ± 0.00^b	0.14 ± 0.00^b
Ethyl Octanoate (mg/L)	Sour apple	0.08 ± 0.01^a	0.29 ± 0.01^b	0.30 ± 0.02^b
Sum of esters (mg/L)		8.06 ± 0.25^a	34.05 ± 2.32^b	35.10 ± 0.14^b
Acetaldehyde (µg/L)	Green apple, fruity	11,202 ± 589^c	2723 ± 303^b	1690 ± 163^a
2-methylbutanal (µg/L)	Green grass, fruity, sour	7.9 ± 0.0^c	0.8 ± 0.1^b	0.2 ± 0.0^a
3-methylbutanal (µg/L)	Banana, apple, cherry	29.6 ± 0.1^c	5.4 ± 0.6^b	1.8 ± 0.1 ^a
Hexanal (µg/L)	Bitter, astringent, green leaves	9.9 ± 0.1^c	1.4 ± 0.0^a	1.5 ± 0.1^b
Phenylacetaldehyde (µg/L)	Hyacinth, lilac	10.1 ± 0.2^c	3.8 ± 0.1^b	2.2 ± 0.4^a
Methional (µg/L)	Mashed potato, warm, soup-like	9.3 ± 1.2^c	4.0 ± 0.0^b	3.2 ± 0.0^a
Furfural (µg/L)	Bread, almond, sweet	16.7 ± 0.6^b	7.9 ± 0.2^a	7.9 ± 0.2^a
Sum of aldehydes (µg/L)		11,285 ± 592^c	2746 ± 304^b	1706 ± 164^a
Diacetyl (µg/L)	Butter, scotch	8.7 ± 0.1	n.d	n.d
2,3-pentandione (µg/L)	Buttery, toasty caramellic	1.3 ± 0.1	n.d	n.d
Sum of ketones (µg/L)		10.0 ± 0.2	n.d	n.d

Different lowercase letters within a row indicate significant differences (p < 0.05)