Table 2. Volatile compounds of essential oil from Citrus hystrix peel

No.	Rt. (min)	Compounds	Percentage (%)
1	3.16	2-Thujene	0.28
2	3.27	α-Pinene	3.74
3	3.46	Camphene	0.17
4	3.69	Sabinene	21.37
5	3.78	β-Pinene	30.19
6	3.82	β-Mycrene	1.72
7	4.19	α-Terpinene	0.86
8	4.35	D-Limonene	22.15
9	4.38	β-Phellandrene	1.04
10	4.68	γ-Terpinene	1.46
11	4.83	cis-Linalool oxide	1.20
12	5.03	trans-Linalool oxide (furanoid)	0.96
13	5.16	Linalool	0.62
14	5.81	Citronellal	6.17
15	6.24	Terpinen-4-ol	4.88
16	6.41	α-Terpineol	1.77
17	8.15	Citronellol acetate	0.18
18	8.57	Copaene	0.31
19	8.69	β-Cubebene	0.20
20	9.09	Caryophyllene	0.22
21	9.75	Germacrene D	0.15
22	10.10	Cadina-1(10), 4-dien	0.34
Total:			99.98%
Monoterpene hydrocarbon			83.52%
Monoterpenoids			15.78%
Sesquiterpene hydrocarbon			0.68%