Effects of solvent-free microwave extraction on the chemical composition of essential oil of Calamintha nepeta (L.) Savi compared with the conventional production method |
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| Authors: | Riela Serena Bruno Maurizio Formisano Carmen Rigano Daniela Rosselli Sergio Saladino Maria Luisa Senatore Felice |
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| Institution: | Dipartimento di Chimica Organica "E. Paternò", Università degli Studi di Palermo, Palermo, Italy. serenariela@unipa.it |
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| Abstract: | The essential oil of Calamintha nepeta has been obtained by solvent-free microwave extraction (SFME) and by classical hydrodistillation (HD). A comparative qualitative-quantitative study on the composition of the oils was carried out. A total of 38 compounds, constituting 97.6% of the oil, were identified in the oil obtained by SFME, whereas 46 compounds, representing 95.4% of the oil, were characterized in the HD oil. SFME-distilled oil is richer in lightly oxygenated monoterpenes (LOM) than HD oil. It also has a higher amount of sesquiterpenes and a lower quantity of hydrocarbon monoterpenes. HD oil seems to be affected by chemical changes more than SFME oil. |
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