Journal of Analytical Methods in Chemistry

Research Article

Effects of Ultrasound Technique on the Composition of Different Essential Oils

Table 4

Changes in the chemical composition in solutions of peppermint oil.


Compound	IR	Chemical composition of essential oil (mg/ml)
		Alcohol solutions					Hexane solutions
		A	B	C	D	K	A	B	C	D	K

Pinene <alpha->	939	0.91	0.94	0.87	0.97	0.88	0.98	0.94	0.95	1.07	0.95
Sabinene	975	0.51	0.54	0.50	0.55	0.50	0.52	0.50	0.51	0.56	0.51
Pinene <beta->	981	1.17	1.23	1.15	1.28	1.15	1.27	1.23	1.24	1.40	1.24
Cymene <para->	1026	0.32	0.34	0.32	0.35	0.32	0.67	0.64	0.64	0.72	0.65
Limonene	1030	2.60	2.70	2.61	2.84	2.56	2.83	2.76	2.76	3.09	2.75
Cineole <1,8->	1033	4.79	4.96	4.80	5.13	4.74	5.05	4.85	4.83	5.38	4.86
Terpinene <gamma->	1060	0.20	0.21	0.20	0.22	0.20	0.22	0.22	0.22	0.25	0.21
Isopulegol	1151	0.26	0.27	0.28	0.28	0.28	0.17	0.24	0.24	0.21	0.25
Menthone	1155	16.88^a	16.98^a	17.12^a	17.26^a	17.20^a	18.37^a	17.72^a	17.73^a	17.45^a	17.85^a
Menthofuran	1165	3.08	3.07	3.04	3.14	3.07	2.06	2.05	2.03	2.25	2.05
Menthone <iso->	1164	2.89	2.95	2.90	2.94	2.89	3.24	3.10	3.12	3.55	3.19
Menthol <neo->	1167	3.05	3.07	3.13	3.07	3.17	3.98	3.870	3.87	3.48	3.93
Menthol	1174	36.93^a	36.51^a	36.83^a	36.38^a	36.39^a	35.90^a	37.34^a	37.33^a	34.23^a	37.05^a
Menthol <iso->	1184	0.22	0.22	0.22	0.22	0.22	0.14	0.280	0.27	0.31	0.14
Terpineol <alpha->	1190	0.28	0.28	0.29	0.28	0.30	0.22	0.220	0.22	0.25	0.23
Pulegone	1237	1.76	1.76	1.75	1.73	1.77	1.55	1.520	1.53	1.70	1.54
Piperitone	1253	0.32	0.31	0.33	0.28	0.30	0.22	0.240	0.24	0.26	0.25
Menthyl acetate <neo->	1275	0.25	0.24	0.25	0.24	0.25	0.23	0.240	0.24	0.26	0.27
Menthyl acetate	1298	6.11^a	6.06^a	6.11^a	5.99^a	6.22^a	5.22^a	5.06^a	4.98^a	5.59^a	5.22^a
Caryophyllene <E->	1420	4.88	4.79	4.77	4.56	4.98	3.96	3.84	3.81	4.31	3.98
Germacrene D	1487	0.48	0.46	0.47	0.42	0.50	0.10	0.09	0.09	0.11	0.10
Caryophyllene oxide	1585	0.32	0.32	0.30	0.27	0.34	1.44	1.35	1.36	1.58	1.37

Designation according to Table 1. IR: retention indices (from temperature programming, using the definition of Van den Dool and Kratz [17]). Values designated with the same superscript letters for the dominant compound do not significantly differ at 5% error (Duncan’s test).