Oxidative stability of chia seed oil and flax seed oil and impact of rosemary (Rosmarinus officinalis L.) and garlic (Allium cepa L.) extracts on the prevention of lipid oxidation

Jung, Hyojik; Kim, Inhwan; Jung, Sunghyeon; Lee, Jihyun

doi:10.1186/s13765-020-00571-5

Applied Biological Chemistry

Table 4 Identified volatile compounds in chia seed and flax seed oils during accelerated storage

From: Oxidative stability of chia seed oil and flax seed oil and impact of rosemary (Rosmarinus officinalis L.) and garlic (Allium cepa L.) extracts on the prevention of lipid oxidation

No	Volatile compound	Measured RI	Literature RI^a	Extracted ion^b	Internal standard	Chia seed oil	Flax seed oil
	Aldehydes
3^d	Hexanal	1080	1080	44	octanal-d16	O^c	O
5	2-Pentenal	1119	1073	55	octanal-d16	O
14	(2Z)-Heptanal	1316	1318	83	octanal-d16	O	O
17^d	Nonanal	1387	1387	98	octanal-d16	O	O
19^d	2-Octanal	1420	1421	70	octanal-d16	O
21	(2E,4E)-Heptadienal	1457	1457	81	octanal-d16	O	O
22	Decanal	1490	1490	73	octanal-d16		O
24	(2E)-Nonenal	1529	1529	55	octanal-d16		O
27	(2E)-Decenal	1695	1682	55	octanal-d16		O
28	(2E,4E)-Decadienal	1800	1800	81	octanal-d16	O
	Ketones
18	3-Octen-2-one	1394	1394	126	octanal-d16	O	O
23	(3E,5E)-Octadien-2-one	1510	1521	95	octanal-d16	O	O
29	1-(4-Ethylphenyl)ethanone	1821	1867	79	octanal-d16		O
	Alcohols
9	1-Penten-3-ol	1163	1162	56	hexyl-d13 alcohol	O	O
10	2-Methyl-3-pentanol	1165	1167	59	hexyl-d13 alcohol	O
15	(2Z)-Penten-1-ol	1321	1321	57	hexyl-d13 alcohol		O
16^d	1-Hexanol	1355	1355	56	hexyl-d13 alcohol	O	O
20	1-Octen-3-ol	1451	1451	57	hexyl-d13 alcohol	O	O
	Acids
25	Propanoic acid	1533	1534	74	hexyl-d13 alcohol	O	O
26	Butanoic acid	1665	1663	60	hexyl-d13 alcohol	O
30^d	Hexanoic acid	1849	1849	73	hexyl-d13 alcohol	O	O
33^d	Octanoic acid	2067	2070	87	hexyl-d13 alcohol	O	O
34	Nonanoic acid	2100	2116	60	hexyl-d13 alcohol	O
	Furans
1	2-Ethylfuran	957	960	71	hexyl-d13 alcohol	O	O
12	2-Pentylfuran	1228	1228	138	hexyl-d13 alcohol	O	O
32	5-Pentyldihydro-2(3H)-furanone	2034	2035	57	hexyl-d13 alcohol		O
	Additional compounds
2^d	α-Pinene	1019	1019	93	hexyl-d13 alcohol	O	O
4	β-Sabinene	1113	1113	93	hexyl-d13 alcohol	O
6	β -Pinene	1123	1125	93	hexyl-d13 alcohol	O	O
7	o-Xylene	1127	1142	91	hexyl-d13 alcohol	O	O
8	β-Myrcene	1160	1160	93	hexyl-d13 alcohol	O	O
11	D-Limonene	1189	1189	68	hexyl-d13 alcohol	O	O
13	p-Cymene	1264	1264	119	hexyl-d13 alcohol	O	O
31	Phenol	1989	2002	94	hexyl-d13 alcohol	O	O

^aRI indicates retention index. RI values were obtained from https://www.nist.gov.or.flavornet.org
^bExtracted ion from total ion scan was used for quantitation
^cThe circle represents presence of the volatile compound
^dVerified using a standard. Other volatiles were tentatively identified by searching the Wiley 9 and NIST 8 mass spectral libraries with < 80% match score as a cut-off and/or by comparing their Kovats’ retention index (RI)

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