engleski

Free and Glycosidically Bound Volatiles Composition of Mentha aquatica L.

Free and glycosidically bound volatiles of Mentha aquatica L. were investigated. The free volatile compounds were isolated from the dried plant material by hydrodistillation and glycosides by extraction with water during the hydrodistillation. Free volatile compounds (essential oil) as well as the aglycones obtained after the hydrolysis of glycosides were analyzed by gas chromatography-mass spectrometry (GC-MS). The essential oil was composed of monoterpene hydrocarbons (10.47%), sesquiterpene hydrocarbons (20.09%) and oxygen containing compounds (68.42%). The major components of the essential oil were: menthofuran (3978.08 mg/kg), 1,8-cineole (1716.44 mg/kg) and trans-caryophyllene (1109.20 mg/kg). After the enzymatic hydrolysis, the major volatile aglycones were: 1-octen-3-ol (30.22 mg/kg), eugenol (10.21 mg/kg), 2-phenylethanol (6.81 mg/kg), 3-hexen-1-ol (5.35 mg/kg), perilla alcohol (4.13 mg/kg), 1-hexanol (3.58 mg/kg), and 3-octanol (2.44 mg/kg). Moderate similarity was found between the volatile aglycones and corresponding free volatiles in the essential oil. The acidic hydrolysis, after the enzymatic, liberated additional amounts of the aglycones. Approx. 38 % of the glycosides had not been hydrolyzed by the used enzyme.

Mentha aquatica L.; Lamiaceae; essential oil; volatile aglycones; menthofuran; 1;8-cineole; 1-octen-3-ol; eugenol

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