Table 3.

Compounds detected in vodka samples.

Name	RT1/LTPRI1	RT1/LTPRI2	LTPRI1 LIT	LTPRI2 LIT	Descriptor
(E)-2-Heptenal	50.41/950	53.00/1049	960	1062	Sulfurous, earthy, grossy, and almond
(E)-2-Octene	38.55/813	34.72/816	815	819	—
(Z)-2-Nonenal	64.94/1134	66.97/1251	1148	1254	Cucumber, geranium and green
1-Hexanol	42.59/875	45.73/991	870	980	Dry, floral, grossy, green, woody, and fruity
1-Octen-3-one	52.82/979	54.96/1075	979	1066	Herbaceous
2-Methyl-1-butanol	32.07/739	37.35/848	739	852	Winey, buttery, and malty
3-Methylbut-2-en-1-ol	35.22/775	38.53/863	778	863	Fruity and green
3-Methylfuran	22.07/614	37.44/849	614	856	—
Ethanol	14.91/426	18.55/575	437	564	Alcoholic
Ethyl acetate	21.00/600	24.68/682	609	673	Acidic, etheral, fruity, and orange
Ethyl butyrate	37.31/799	38.42/861	799	864	Fruity and acetone
Furfural	38.49/812	46.80/967	827	972	Almond and bread
Hexyl butyrate	69.28/1193	68.24/1271	1191	1257	Apple, fruity, and green
Limonene	58.06/1044	54.82/1074	1033	1061	Citrus, fruity, and minty
Methanol	14.63/418	16.67/516	419	507	—
Methylnonanedione	73.97/1261	75.92/1396	1253	1397	Fruity and straw
Propenal	15.24/435	18.11/561	450	566	—
Pyrazine	31.11/728	35.94/831	738	822	Corn and nutty
Tert-butylmethylether	19.31/551	19.24/596	546	600	—
Tetradecane	82.64/1393	75.83/1395	1400	1400	Alkane, sweet, and mildly herbaceous
Undecane	62.56/1101	56.14/1091	1100	1100	Alkane and fusel

RT1: retention time in column 1 (MXT-5);

LTPRI1: linear temperature-programmed retention index for compounds from column 1;

RT2: retention time in column 2 (MXT-1701);

LTPRI2: linear temperature-programmed retention index for compounds from column 2;

LTPRI1 LIT: linear temperature-programmed retention index for compounds from column 1 from literature;

LTPRI2 LIT: linear temperature-programmed retention index for compounds from column 2 from literature.

The positive identification of selected compounds was highlighted in bold font.