Characterization of the Volatile Components of Essential Oils of Selected Plants in Kenya

Table 1

Composition of chemical classes identified from different essential oils.

S/no.	Chemical class	Percent composition				Average
		Tick berry	Mexican marigold	Ginger	Garlic
1	Terpenes	37.26	20.94	42.18	39.57	34.99
2	Ester	5.02	14.01	5.8	4.58	7.35
3	Ketones	2.07	8.93	8.99	4.61	6.15
4	Organosulfur	5.19	1.79	0.04	15.01	5.51
5	Alkanes	7.55	0.87	7.42	3.20	4.76
6	Cycloalkane	7.31	5.82	4.99	0.12	4.56
7	Steroid	7.08	2.01	2.26	4.82	4.04
8	Aromatic hydrocarbon	0.73	4.16	4.37	6.36	3.91
9	Alkanols	5.12	4.73	2.51	0.62	3.25
10	Cycloalkanol	4.04	1.55	4.13		2.43
11	Alkenols	5.73	0.54	2.73	0.59	2.40
12	Carbonates		2.12	1.61	3.71	1.86
13	Fatty acids			3.67	3.61	1.82
14	Carbaldehyde	0.59	2.41	0.28	3.85	1.78
15	Aldehydes	4.67	0.67	1.3		1.66
16	Alkenes	0.12	5.32	0.48		1.48
17	Ethers	0.07	2.56		2.53	1.29
18	Organic acid	0.98	3.52	0.24	0.26	1.25
19	Carboxylic acid		2.81	1.12	0.32	1.06
20	Alkaloids	0.09	3.50		0.06	0.91
21	Heterocyclic hydrocarbon	0.03	0.43		2.49	0.74
22	Hydroquinones		2.95			0.74
23	Cyclic carboxylic ester (lactone)		2.25			0.56
24	Nitrile		0.15		1.81	0.49
25	Furans	1.28	0.09	0.47		0.46
26	Benzyl carbazate	1.67	0.09			0.44
27	Dione	1.71	0.02			0.43
28	Amide	0.93		0.5	0.16	0.40
29	Cycloketone (cyclohexanone)			1.14		0.29
30	Antihistamine		1.12			0.28
31	Thiozole			1.05		0.26
32	Polyphenol			1.04		0.26
33	Hydroxysteroid				0.78	0.20
34	Phthalate	0.11	0.06	0.51	0.04	0.18
35	Silane		0.6		0.07	0.17
36	Aromatic hydrocarbon (toluene)		0.64			0.16
37	Amine	0.03	0.39		0.08	0.13
38	Chloroalkyne		0.45			0.11
39	Cycloalkenol			0.07	0.26	0.08
40	Thiophene	0.33				0.08
41	Aromatic amine (aniline)			0.29		0.07
42	Phenanthrenol		0.24			0.06
43	Allethrin			0.21		0.05
44	Phenol	0.17				0.04
45	Corticosteroid		0.15			0.04
46	Polycylic aromatic hydrocarbon				0.12	0.03
47	Dye		0.07			0.02
48	Bithiophene		0.07			0.02
49	Pyrrolidinophenone			0.04		0.01
50	Morpholine			0.04		0.01
	Total compounds found	28 (53.8%)	37 (71.2%)	29 (55.8%)	28 (53.8%)