journal article·1994-01

Study of Microwave Extraction of Essential Oil Constituents from Plant Materials

S.S. Chen, M. Spiro

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Abstract

The microwave heating characteristics of extraction mixtures consisting of rosemary or peppermint leaves suspended in hexane, ethanol and hexane + ethanol mixtures were studied. The temperature rises were found to depend on the dielectric properties of the solvents and the leaves in question. The rates of extraction of several essential oil constituents increased with increasing power output between ca 200 and 640 W but not in a proportional way. Scanning electron micrographs of the leaves showed that the extraction rates were related to structural changes in the oil-containing glands.
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Research context

OpenAlex topics: Microwave-Assisted Synthesis and Applications

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References (10)

Show source-provided references
1. Gabriel, C., Chan, T.Y.A., and Grant, E.H. Admittance mod¬els for open-ended coaxial probes and their place in di¬electric spectroscopy. Phys. Med. Biol. In press.
2. Hasted, J.B. 1973. Aqueous Dielectrics. Chapman and Hall, London, England. Ch. 1.
3. Kingston, H.M. and Jassie, L.B. 1988. Introduction to Mi¬crowave Sample Preparation (Eds. H.M. Kingston and L.B. Jassie). American Chem. Soc., Washington, DC. Ch. 6.
4. Metaxas, A.C. and Meredith, R.J. 1983. Industrial Microwave Heating. Peter Peregrinus, London, Ch. 1–3.
5. Pare, J.R.J., Sigomin, M., Lapointe, J. 1991. Microwave-assisted natural products extraction. US patent 5,002,784.
6. Pare, J.R.J. 1992. Microwave extraction of volatile oil and apparatus thereof. European patent 0485 668A1.
7. Swain, M. and James, J.J. 1993. Conf. Proc., Microwave and High Frequency ‘93. Goteborg. L2.
8. Timmermans, J. 1950. Physico-Chemical Constants of Pure Organic Compounds. Elsevier, New York, NY pp. 44–46.
9. TRC. 1994. Thermodynamic Tables for Non-Hydrocarbons. X, VC-5033.
10. von Hippel, A.R. 1954. Dielectric Materials and Applica¬tions. Wiley and Sons, New York, NY. Ch. 1.