Antioxidant Activity and Volatile Composition of Red Araçá Pulp Under Different Drying Conditions

Table 4

Chemical composition (%) of the volatile fraction of ethanolic extracts of red araçá fruits obtained at different drying conditions.

Compound	tr (min)	RI^a	RI^b	Relative area (%)
				Run 1 (40°C, 1.5 m/s)	Run 2 (60°C, 1.5 m/s)	Run 3 (40°C, 2.5 m/s)	Run 4 (60°C, 2.5 m/s)	Run 5^c (50°C, 2.0 m/s)
Furfural (FF)	4.88	—	830	1.98	2.72	6.9	2.5	2.92 ± 0.32
1R-α-Pinene	6.81	—	937	nd	nd	0.55	nd	nd
1,1-Diethoxy-3-methylbutane	7.60	—	930	nd	1.42	1.08	0.75	0.77 ± 0.14
β-Pinene	8.43	—	980	nd	nd	0.21	nd	nd
α-Terpinene	9.27	1016	1018	1.00	nd	0.36	nd	nd
δ-Limonene	9.76	1029	1031	nd	2.14	nd	1.40	0.80 ± 0.11
Eucalyptol	9.84	1037	1033	1.79	2.13	1.60	2.00	1.72 ± 0.35
trans-β-Ocimene	10.02	1039	1050	0.60	0.81	nd	0.81	0.55 ± 0.16
γ-Terpinene	10.80	1063	1062	0.06	2.50	1.72	3.10	2.29 ± 0.54
Terpinolene	11.64	1088	1088	1.15	1.96	1.83	1.22	0.45 ± 0.12
Linalol	12.09	1099	1098	1.26	1.29	1.24	1.25	1.43 ± 0.46
2,3-Dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one ((DDMP)	13.53	1144	1134	2.26	3.40	7.23	2.07	3.28 ± 0.30
Butanoicacidhexylester	15.20	1192	1191	0.75	0.93	0.96	0.80	0.78 ± 0.02
Dodecane	15.43	1199	1200	0.62	1.17	0.97	0.65	0.85 ± 0.08
5-Hydroxymethylfurfural (HMF)	16.34	1226	1224	30.33	12.85	39.56	14.65	23.15 ± 1.33
α-Copaene	21.35	1378	1376	1.60	nd	1.15	1.42	1.24 ± 0.24
Caryophyllene	23.01	1431	1428	9.85	9.16	7.57	8.69	7.49 ± 0.55
Humulene	23.82	1457	1440	0.89	0.77	0.64	0.81	0.68 ± 0.10
γ-Muurolene	24.56	1482	1477	2.00	2.07	1.48	1.88	1.55 ± 0.26
β-Selinene	24.91	1493	1485	2.31	2.12	1.52	2.04	1.74 ± 0.28
α-Selinene	25.20	1502	1494	2.53	2.45	2.07	2.20	1.86 ± 0.15
β-Bisabolene	25.77	1522	1509	1.43	1.21	1.50	1.13	1.02 ± 0.08
γ-Cadinene	26.12	1534	1513	2.34	2.00	2.00	2.09	1.98 ± 0.22
Selina-3,7(11)-diene	26.54	1548	1534	4.14	2.00	2.00	2.96	2.29 ± 0.54
E-Nerolidol	27.19	1571	1564	1.65	0.95	0.77	1.14	0.93 ± 0.09
Cubenol	28.94	1632	1642	1.36	0.73	0.87	0.76	0.74 ± 0.11
γ-Eudesmol	29.06	1637	1629	1.13	0.51	0.37	0.46	0.78 ± 0.21
(−) -Cadinol	29.59	1656	1636	1.05	1.33	0.70	1.24	1.09 ± 0.28
1,3a-Ethano(1H)inden-4-ol-octahydro-2,2.4.7a-tetramethyl	29.82	1664	1648	0.45	1.34	0.99	0.30	nd
Eudesm-7(11)-en-4-ol	30.82	1700	1700	4.50	1.01	0.68	0.99	0.92 ± 012
Total relative area of identified compounds	—	—	—	79.03	60.97	88.53	59.31	64.31 ± 0.32

t_r: retention time; RI^a: calculated retention index; RI^b: retention index from Pherobase and Leffingwell. ^cAverage values of triplicate runs and standard deviation.