comparative study ofessential oils composition of three varieties of mentha longifolia[L.] huds. growing in Iran

The essential oils of three wild varieties of Mentha longifolia [L.] Huds. growing in distinct geographic areas of Iran [var. petiolata, var. kotschyana and var. chlorodictya], obtained by hydrodistillation, were studied. The results of quantitative and qualitative analysis by means of GC/MS, have shown that the essential oils of two varieties [var. chlorodictya and var. kotschyana]were characterized by the high concentration of piperitone oxide and piperitenone oxide, whereas the third one [var. petiolata]was rich in pulegone. Mentha chlorodictya has the higher amount of essential oil [2.6% v/w], the yield of Mentha petiolata and Mentha kotschyana was 2.1 and 1.3 v/w, respectively

comparative study of essential oils composition of three varieties of Mentha longifolia [L.] Huds., growing in Iran

The essential oils of three wild varieties of Mentha longifolia [L.] Huds. growing in distinct geographic area of Iran [var. petiolata, var. kotschyana and var. chlorodictya], obtained by hydrodistillation, were studied. The results of quantitative and qualitative analysis by means of GC/MS, have shown that the essential oils of two varieties [var. chlorodictya and var. kotschyana] were characterized by the high concentration of piperitone oxide and piperitenone oxide, whereas the third one [var. petiolata] was rich in pulegone. Mentha chlorodictya has the higher amount of essential oil [2.6% v/w], the yield of Mentha petiolata and Mentha kotschyana was 2.1 and 1.3% v/w, respectively

Comparison between the essential oil and supercritical carbon dioxide extraction of mentha piperita L. cultivated in Iran

The chemical compositions of the essential oils and the volatile concentrate of Mentha piperita L. [Labiatae] obtained by supercritical carbon dioxide extraction [SFE] at 35°C and 100 atm were compared using GC/MS. Whereas twenty four components were identified in the essential oil, only seven compounds, including the main compounds of the peppermint oil were isolated by the SFE. The percent of major components of the oil and the extract were: Menthol [31.53 and 48.39], Menthone [23.37 and 26.68] and Isomenthone [11.11 and 6.58], respectively. From these results it may concluded that the SFE method supply a selective essential oil extract