Showing papers on "Mentha pulegium published in 1999"
TL;DR: Out of 8 species and 15 taxa (including hybrids) of Mentha existing in the flora of Turkey, 8 taxa belonging to 6 species were investigated for essential oils, and chemotypic variations based on the results of essential oil analysis, soil analysis and chromosome counts are discussed.
Abstract: Out of 8 species and 15 taxa (including hybrids) of Mentha existing in the flora of Turkey, 8 taxa belonging to 6 species were investigated for essential oils. Of 272 samples collected from 181 stations in northern Turkey, 85 were subjected to water distillation and GC/MS analysis. The taxa investigated were as follows: Mentha pulegium, M. suaveolens, M. aquatica, M. spicata var. spicata, M. longifolia ssp. longifolia, M. longifolia ssp. typhoides, M. x dumetorium, M. x villosa-nervata. The authors discuss chemotypic variations based on the results of essential oil analysis, soil analysis and chromosome counts.
93 citations
TL;DR: In this paper, a two-stage fractional separation technique was used to extract pennyroyal (Mentha pulegium L) leaves and flowers using supercritical CO2, and the best conditions of extraction (P=100 bar and T=50°C) and of separation (P =80 bar, T=−16°C for the first separator and P=18 bar, t=0°Cfor the second) were found and used to investigate the effect of different mean particle diameters.
Abstract: Flowers and leaves of pennyroyal (Mentha pulegium L.) were extracted using supercritical CO2 followed by a two-stage fractional separation technique. Using a flow apparatus with an extraction vessel (1 l) and two separators (0.27 l), the best conditions of extraction (P=100 bar and T=50°C) and of separation (P=80 bar, T=−16°C for the first separator and P=18 bar, T=0°C for the second) were found and used to investigate the effect of different mean particle diameters. The pennyroyal oil obtained under these conditions was compared with that obtained by hydrodistillation. Twenty-one components were identified by GC–MS and quantified by GC. Both the hydrodistillation and supercritical oils of Mentha pulegium L. contain the oxygenated monoterpenes pulegone (∽80%) and menthone (∽9%) as the main components. The aroma of the pennyroyal oil obtained with supercritical CO2 was closer to that of the starting vegetable material than the aroma of the essential oil produced by hydrodistillation. Copyright © 1999 John Wiley & Sons, Ltd.
59 citations