A Simple Method to Extract Essential Oils from Tissue Samples by Using Microwave Radiation |
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Authors: | Nélida E Gómez Ludger Witte |
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Affiliation: | (1) Smithsonian Tropical Research Institute, PO Box 2072, Balboa, Panama;(2) Institut für Pharmazeutische Biologie, Technische Universität Braunschweig, Mendelssohnstrasse 1, D-38106 Braunschweig, Germany |
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Abstract: | A microwave protocol to extract lipophilic substances from tissue was modified to extract essential oils (EOs) from plant tissue and insect feculae. The material, in a solvent transparent to microwave radiation, is exposed for a short time to steam in a microwave oven. EO extracts are analyzed directly by GC or GC-MS when plant material is fresh and terpenes contained in glandular structures on leaf surfaces are readily released into the solvent. For dried material or insect feculae, mechanical means are utilized first to break up tissue; however, the complete procedure is carried out inside the same vial to reduce losses. Statistical analysis shows that the reproducibility of the modified method is high. Several samples can be run within an hour with this method. |
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Keywords: | Microwave essential oil Cordia curassavica Chrysomelidae Boraginaceae lower terpenes extraction method chamomile |
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