Research on the comparison of active ingredients of rosemary, thyme and laurel

In this study, the chemical composition of thyme (Thymus vulgaris L.), rosemary (Rosmarinus officinalis L.) and laurel (Laurus nobilis L.) essential oils extracted by supercritical carbon dioxide (SC-CO2) and distillation methods were determined. While 14.565%, 4.134% and 2.755% linalool were detected in thyme, rosemary and laurel essential oils obtained by SC-CO2 extraction method, respectively, 37.057%, 2.942% and 2.742% carvacrol were detected in the same plant oils, respectively. While thyme essential oil obtained by the distillation method contains 3.589% linalool, 72.160% carvacrol, 1.626% borneol and 1.920% thymol, rosemary essential oil contained 3.331% linalool, 10.449% 1,8-cineol, 11.224% camphor, 6.669% borneol and 0.207% thymol. While the dominant component of thyme essential oil obtained by both methods was carvacrol, the major constituent of rosemary and laurel essential oils was 1,8- cineol.