Table 3.
The VOCs identified in needle of red pine tree by HS-SPME-GC/MS analysis

Retention Time (min)	Quantitation ion (m/z)	Component Name	Kovats Retention Index1
11.9	81	2-Ethyl furan	915
13.5	57	2-Methyl-3-pentanone	974
13.8	58	4-Methyl-2-pentanone	984
14.5	93	Tricyclene	1005
15.1	93	α-Pinene	1021
16.5	74	2-Methyl-1-propanol	1060
16.7	93	Camphene	1064
18.3	93	β-Pinene	1104
18.6	93	Sabinene	1114
18.7	91	2,4(10)-Thujadiene	1117
19.0	57	1-Penten-3-ol	1127
19.4	69	4-Methyl-2-pentanol	1136
19.9	93	β-Myrcene	1149
20.3	93	l-Phellandrene	1159
20.6	74	Methyl hexanoate	1167
20.7	83	2-Methyl-2-butenoate	1170
20.8	121	α-Terpinene	1173
20.9	70	Isopentanol	1175
21.1	83	Cyclohexene oxide	1180
21.4	45	2-Hexanol	1188
21.5	67	d-Limonene	1191
21.8	41	(E)-2-Hexenal	1198
22.0	93	β-Phellandrene	1202
22.5	68	Isoprenol	1217
24.0	119	p-Cymene	1259
24.6	9.	Terpinolene	1275
25.0	57	(E)-2-Penten-1-ol	1284
25.0	71	3-Methyl-2-buten-1-ol	1285
25.8	83	2-Heptenal	1305
26.1	43	Sulcatone	1315
26.2	56	1-Hexanol	1318
27.3	67	(E)-3-Hexen-1-ol	1351
28.2	87	2-Butoxy-ethanol	1375
28.2	82	Cyclohexanol	1377
28.4	81	2,4-Hexadienal	1380
28.5	91	1,3,8-p-Menthatriene	1383
29.0	150	Perillene	1397
29.7	117	p-Cymenene	1416
30.9	59	Linalool oxide	1447
31.4	105	α-Cubebene	1460
32.9	77	Benzaldehyde	1496
33.1	119	α-Copaene	1500
33.6	95	Camphor	1510
34.3	81	β-Bourbonene	1524
35.7	81	Pinocarvone	1551
36.0	149	Methyl thymyl ether	1556
36.3	95	L-Bornyl acetate	1561
36.7	71	Terpinen-4-ol	1568
37.1	161	Longifolene	1577
37.5	105	Methyl benzoate	1584
38.0	161	β-Cubebene	1592
38.3	91	Caryophyllene	1597
38.8	79	Myrtenal	1606
38.9	161	Aromadendrene	1609
39.6	92	Pinocarveol	1620
40.6	69	cis-β-Farnesene	1638
40.7	109	cis-Verbenol	1640
41.3	95	Cryptone	1650
41.7	59	α-Terpineol	1656
42.2	95	Borneol	1665
42.3	93	α-Humulene	1666
43.0	161	γ-Muurolene	1678
43.5	135	Verbenone	1685
43.8	68	Linalool oxide1	1691
44.3	161	Germacrene-D	1699
44.8	105	α-Muurolene	1708
45.0	105	β-Selinene	1712
46.4	161	δ-Cadinene	1741
46.7	161	γ-Cadinene	1748
47.0	79	Myrtenol	1752
48.3	105	α-Cadinene	1778
49.3	135	p-Cymen-8-ol	1798
57.1	79	Caryophyllene oxide	1973
59.5	96	Humulene oxide	2027
62.5	91	Spathulenol	2091

Kovats Retention Index : Retention indices were determined using n-alkane C7 to C30 as an external standard