Headspace Single-Drop Microextraction Gas Chromatography Mass Spectrometry for the Analysis of Volatile Compounds from Herba Asari

Table 1

Components of Herba Asari obtained by SDME-GC-MS.

No	Retention time (min)	Compounds	RI	SDME- (mixed-) GC-MS; RA%
1	3.60	Acetic acid, 2-methylpropyl ester	1047	0.07
2	3.76	1R-.alpha.-Pinene	1052	0.21
3	5.85	beta.-Pinene	1099	0.34
4	7.40	3-Carene	1158	0.83
5	7.88	.alpha.-Phellandrene	1172	0.28
6	7.94	beta.-Phellandrene	1174	0.01
7	8.65	D-Limonene	1192	0.21
8	8.88	Eucalyptol	1193	0.55
9	9.36	1,3,6-Octatriene, 3,7-dimethyl-, (E)-	1230	0.08
10	9.50	1,4-Cyclohexadiene, 1-methyl-4-(1-methylethyl)-	1240	0.10
11	9.61	1,3,6-Octatriene, 3,7-dimethyl-, (Z)-	1248	0.08
12	9.67	Nonane, 3-methyl-	1253	0.32
13	9.73	Tridecane, 7-methyl-	1257	0.51
14	9.85	Tridecane, 7-methyl-	1265	0.86
15	9.96	Benzene, 1-methyl-2-(1-methylethyl)-	1272	0.31
16	10.03	Cyclohexene, 1-methyl-4-(1-methylethylidene)-	1277	0.45
17	10.86	Cyclohexene, 1-methyl-4-(1-methylethylidene)-	1598	0.21
18	11.40	Tetradecane	1397	2.23
19	11.74	Benzene, 1-methyl-4-(1-methylethenmethylethyl)-	1428	0.08
20	12.16	1,3-Cyclohexadiene, 1-methyl-4-(1-methylethyl)-	1467	0.08
21	12.49	Pentadecane	1496	12.80
22	12.74	1-Hexadecanol	1516	0.20
23	12.77	Bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-, (1R)-	1518	0.34
24	12.82	Cyclopentadecane	1522	0.65
25	13.29	Eucarvone	1556	2.33
26	13.55	Aristolene	1574	0.43
27	13.63	1,6,10-Dodecatriene, 7,11-dimethyl-3-methylene-, (Z)-	1580	0.75
28	13.68	4,7-Methanoazulene,1,2,3,4,5,6,7,8-octahydro-1,4,9,9-tetramethyl-,[1S-(1.alpha.,4.alpha.,7.alpha.)]-	1584	0.31
29	13.80	Azulene,1,2,3,4,5,6,7,8-octahydro-1,4-dimethyl-7-(1-methylethenyl)-,[1S-(1.alpha.,4.alpha.,7.alpha.)]-	1592	1.07
30	13.90	1H-Cyclopropa[a]naphthalene,1a,2,3,5,6,7,7a,7b-octahydro-1,1,7,7a-tetramethyl-,[1aR-(1a.alpha.,7.alpha.,7a.alpha.,7b.alpha.)]-	1599	1.26
31	13.94	3-Cyclohexen-1-ol,4-methyl-1-(1-methylethyl)-, (R)-	1601	0.66
32	14.06	2H-2,4a-Methanonaphthalene,1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-, (2S)-	1608	0.32
33	14.20	1H-Cyclopenta[1,3]cyclopropa[1,2]benzene,octahydro-7-methyl-3-methylene-4-(1-methylethyl)-,[3aS-(3a.alpha.,3b.beta.,4.beta.,7.alpha.,7  aS*)]-	1616	0.27
34	14.29	Benzene, 1,3,5-tris(1-methylethyl)	1620	0.27
35	14.37	Thujopsene	1625	0.39
36	14.60	Benzoic acid, 2,4-bis[(trimethylsilyl)oxy]-, trimethylsilyl ester	1637	0.07
37	14.65	1H-3a,7-Methanoazulene,2,3,6,7,8,8a-hexahydro-1,4,9,9-tetramethyl-, (1.alpha.,3a.alpha.,7.alpha.,8a.beta.)-	1640	0.23
38	14.74	Androsta-1,4-dien-3-one,17-hydroxy-17-methyl-, (17.alpha.)-	1644	0.41
39	14.86	Cyclohexane, 1,4-bis(methylene)-	1651	0.83
40	14.98	1,6,10-Dodecatriene,7,11-dimethyl-3-methylene-, (Z)-	1657	0.05
41	15.08	Estragole	1662	1.40
42	15.22	Naphthalene,1,2,3,5,6,8a-hexahydro-4,7-dimethyl-1-(1-methylethyl)-, (1S-cis)-	1669	0.65
43	15.60	Heptadecane	1688	0.15
44	15.67	1H-3a,7-Methanoazulene,octahydro-3,8,8-trimethyl-6-methylene-,[3R-(3.alpha.,3a.beta.,7.beta.,8a.alpha.)]-	1692	1.11
45	15.69	3-Cyclohexene-1-methanol,.alpha.,.alpha.4-trimethyl-	1693	0.21
46	15.80	Borneol	1698	1.41
47	15.98	Azulene,1,2,3,3a,4,5,6,7-octahydro-1,4-dimethyl-7-(1-methylethenyl)-,[1R-(1.alpha.,3a.beta.,4.alpha.,7.beta.)]-	1706	0.31
48	16.11	Azulene,1,2,3,5,6,7,8,8a-octahydro-1,4-dimethyl-7-(1-methylethenyl)-,[1S-(1.alpha.,7.alpha.,8a.beta)]-.	1711	0.84
49	16.30	cis-.alpha.-Bisabolene	1719	0.17
50	16.55	1H-Cyclopropa[a]naphthalene,1a,2,3,5,6,7,7a,7b-octahydro-1,1,7,7a-tetramethyl-,[1aR-(1a.alpha.,7.alpha.,7a.alpha.,7b.alpha.)]-	1729	0.18
51	19.54	3,5-Dimethoxytoluene	1845	10.50
52	20.41	Safrole	1878	20.39
53	26.21	Benzene, 1,2-dimethoxy-4-(2-propenyl)-	2070	9.94
54	27.59	Methyleugenol	2110	6.29
55	27.99	Benzene, 1,2,3-trimethoxy-5-methyl	2121	7.33
56	30.48	1,3-Benzodioxole,4-methoxy-6-(2-propenyl)-	2188	5.11
57	33.58	Patchouli alcohol	2264	0.10
58	34.56	1,3-Benzodioxole,4-methoxy-6-(2-propenyl)-	2286	2.31
59	35.83	Benzene, 1,2,3-trimethoxy-5-(2-propenyl)-	2313	0.05
60	35.89	3-(4-N,N-Dimethylaminophenyl)propenoic acid, 2-(diethoxyphosphinyl)-, ethyl ester	2314	0.07
SUM				60