Table 4. Average area of volatile compounds identified with GC-IMS of roasted coffee samples

Area set no	Fomula	Aroma ingredient	KOR		COL		ETH		GUA		BRA		IND
Area set no	Fomula	Aroma ingredient	Area mean	%	Area mean	%	Area mean	%	Area mean	%	Area mean	%	Area mean	%
1	C₃H₈S	1-Propanethiol	119.46	2.32	44.54	0.93	84.44	1.56	52.22	1.06	33.87	0.71	28.97	0.81
2	C₄H₈O	Butanal	122.05	2.37	38.5	0.80	94.99	1.75	60.30	1.23	28.41	0.59	26.22	0.73
3	C₄H₈O₂	Ethyl acetate	54.03	1.05	24.29	0.51	46.99	0.87	29.06	0.59	22.94	0.48	28.56	0.80
5	C₇H₁₄	1-Heptene	294.85	5.72	155.41	3.25	180.51	3.33	294.70	6.00	122.23	2.55	23.75	0.67
6	C₅H₁₀O	2-Pentanone	138.79	2.69	65.19	1.36	60.29	1.11	160.52	3.27	53.13	1.11	12.34	0.35
7	C₄H₅N	3-Butenenitrile	201.14	3.90	165.62	3.46	96.46	1.78	129.97	2.64	65.09	1.36	29.70	0.83
11	C₅H₅N	Pyridine	546.23	10.60	686.16	14.34	681.34	12.57	612.61	12.47	782.02	16.32	1026.04	28.74
12	C₅H₈O₂	2,3-Pentadione	52.35	1.02	284.73	5.95	284.45	5.25	48.70	0.99	114.43	2.39	350.38	9.82
13	C₆H₁₄O₂	Diethoxy-1,1-ethane	1393.95	27.05	1,898.03	39.66	2,155.06	39.75	1711.61	34.83	2024.50	42.25	1252.30	35.08
14	C₆H₁₂O₂	Isobutyl acetate	192.52	3.74	154.07	3.22	207.82	3.83	259.11	5.27	276.57	5.77	213.77	5.99
15	C₄H₁₀O	1-Propanol, 2-methyl-	58.68	1.14	235.53	4.92	302.14	5.57	83.73	1.70	141.52	2.95	118.81	3.33
16	C₃H₈O	1-Propanol	121.33	2.35	37.22	0.78	53.19	0.98	73.89	1.50	32.19	0.67	21.74	0.61
17	C₆H₁₂	Methylcyclopentane	523.58	10.16	259.87	5.43	362.98	6.69	308.57	6.28	218.79	4.57	78.35	2.19
18	C₄H₅N	3-Butenenitrile	217.52	4.22	88.34	1.85	107.09	1.98	141.87	2.89	66.81	1.39	33.11	0.93
19	C₅H₁₀O₂	Ethyl propanoate	146.85	2.85	85.88	1.79	29.51	0.54	36.79	0.75	24.50	0.51	22.42	0.63
20	C₆H₁₂	1-Hexene	92.82	1.80	31.3	0.65	36.7	0.68	38.07	0.77	39.65	0.83	30.27	0.85
21	C₆H₁₄O₂	Diethoxy-1,1-ethane	174.79	3.39	93	1.94	107.4	1.98	121.56	2.47	89.39	1.87	29.44	0.82
22	C₆H₁₂O₂	Ethyl butyrate	114.56	2.22	40.04	0.84	51.86	0.96	57.42	1.17	37.84	0.79	27.80	0.78
23	C₆H₁₂O₂	Propyl propanoate	267.78	5.20	174.37	3.64	241.36	4.45	337.59	6.87	334.07	6.97	98.84	2.77
24	C₅H₆N₂	Methyl pyrazine	165.82	3.22	103.95	2.17	131.97	2.43	201.35	4.10	181.95	3.80	54.86	1.54
25	C₇H₁₆O	Isopropyl tert-butyl ether	41.05	0.80	41.97	0.88	38.55	0.71	45.69	0.93	54.09	1.13	21.61	0.61
26	C₅H₁₀O₂	N-Propyl acetate	112.23	2.18	77.23	1.61	66.61	1.23	109.18	2.22	48.18	1.01	40.51	1.13
		Total	5152.38	100.00	4785.24	100.00	5421.71	100.00	4914.51	100.00	4792.17	100.00	3569.79	100.00

Each value represents mean value of duplicate measurements.