Table 5. Volatile compounds identified with GC-IMS of roasted coffee samples.

Area set no Compounds RT(sec)1) DT(ms)2) Attributes References
1 1-Propane thiol 150.78 1.227 skunky, garlic International Chemical Safety Card
2 Butanal 149.52 1.294 Green, malty Gilberto V. de Melo Pereira, 2019
3 Ethyl acetate 149.94 1.34 fruity CAMEO Chemicals
5 1-Heptene 192.36 1.359 unpleasant odor RSC acquires Merck Index". www.rsc.org. Retrieved 2018
6 2-Pentanone 186.48 1.374 Tobacco T. C. Tso (2007)
7 3-Butenenitrile 174.09 1.313 mustard oil C. Pomeranz, 1906
11 Pyridine 209.79 1.159 Sour, putrid, fishy, amine, bitter, roasted Nicola Caporasoa, 2018
12 2,3-Pentadione 234.36 1.158 Buttery, oily, caramel-like Nicola Caporasoa, 2018
13 Diethoxy-1,1-ethane 177.66 1.233 Pungent ethereal aldehydic fruity the sensory properties in cup
14 Isobutyl acetate 216.09 1.235 Fruity, with an apple and banana nuances Gilberto V. de Melo Pereira, 2019)
15 1-Propanol, 2-methyl 241.29 1.363 fruity, floral National Institute for Occupational Safety and Health
16 1-Propanol 157.29 1.286 Floral with a sweet, coconut nuance Gilberto V. de Melo Pereira, 2019)
17 Methylcyclopentane 128.1 1.241 faint odor Giuliano, Robert, 2014
18 3-Butenenitrile 159.6 1.222 mustard oil C. Pomeranz, 1906
19 Ethyl propanoate 174.3 1.402 Sweet, fruity, rum, juicy Nicola Caporasoa, 2018)
20 1-Hexene 213.15 1.447 a strong fruity odor Ullmann's Encyclopedia of Industrial Chemistry,
21 Diethoxy-1,1-ethane 137.97 1.222 Pungent ethereal aldehydic fruity the sensory properties in cup
22 Ethyl butyrate 215.04 1.392 Sweet, fruity, tutti-fruity Gilberto V. de Melo Pereira, 2019
23 Propyl propanoate 265.44 1.349 Sweet, fruity, rum, juicy Nicola Caporasoa, 2018
24 Methylpyrazine 273.21 1.352 Roasted, hazelnut-like Gilberto V. de Melo Pereira, 2019
25 Isopropyl tert-butyl ether 289.17 1.394 Sweet, fruity Gilberto V. de Melo Pereira, 2019
26 N-Propyl acetate 178.29 1.277 Sweet, fruity Gilberto V. de Melo Pereira, 2019
1)RT: Retention time, 2)DT: Drift time