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Search Completed | Title | Extraction of Essential Oils from Lime (Citrus latifolia Tanaka) by Hydrodistillation and Supercritical Carbon Dioxide
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Text | Extraction of Essential Oils from Lime (Citrus latifolia Tanaka) by Hydrodistillation and Supercritical Carbon Dioxide | 001
and Patrick Moyna
Instituto de Biotecnologia; Departamento de Física e Química; Departamento de Ciências Exatas e da Natureza;
4 Pontifícia Universidade Católica do Rio Grande do Sul; Faculdade de Química; Av. Ipiranga 6681; 90.619-900;
Universidade de Caxias do Sul; Rua Francisco Getúlio Vargas 1130; 95.001-970; Caxias do Sul - RS - Brazil.
Porto Alegre - RS - Brazil. Montevideo - Uruguay
Facultad de Quimica; Cátedra de Ciência y Tecnologia de Alimentos; UR, 11800;
In this work lime essential oils were extracted by hydrodistillation and supercritical carbon dioxide. In the case of hydrodistillation, the parameters evaluated were extraction time and characteristics of the plant material. In supercritical extraction, the parameters evaluated were temperature, pressure, CO2 flow, extraction time and material characteristics. Considering citral content, the best results for hydrodistillation were obtained with a distillation time of 3 hours using whole peels. The best results for supercritical extraction were found using 60oC, 90 bar, at a CO2 flow rate of 1 mL/ min for 30 minutes using milled peels. The best yields of lime oil were obtained by hydrodistillation (5.45% w/w) and supercritical extraction (7.93% w/w) for milled peels.
Key words: Citrus latifolia, lime, d-limonene, supercritical carbon dioxide, hydrodistillation
Citrus oils are mixtures of very volatile components as terpenes and oxygenated compounds (Sato et al., 1996). Limonene, a monoterpene, is the major component of lime and other related citrus essential oils (Lanças and Cavicchioli, 1990). These oils are used in the pharmaceutical, perfumery and food industries (Huet, 1991), and the quality of the oils is related to the value of total aldehydes, basically citral content, which is between 4-5% (Shaw, 1979).
The common commercial methods to produce the oils from citrus fruits and peels are machine cold- pressing and distillation. However, the oils
Author for correspondence
obtained by distillation deteriorate easily and develop off-flavors due to the instability of the terpene hydrocarbons present, particularly d- limonene (Yamauchi and Sato, 1990). Supercritical fluid extraction is an advantageous alternative process for refining citrus oils due to its low operating temperature and the absence of solvent residues (Iwai et al., 1994). Studies with mandarin oils have shown good yield results in comparison with other extraction processes (Atti- Santos et al., 2000). In this work we report the influence of some extraction parameters on the composition of the lime oil obtained by hydrodistillation and supercritical carbon dioxide extraction.
Vol.48, n. 1 : pp. 155-160, January 2005 ISSN 1516-8913 Printed in Brazil
BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY
AN INTERNATIONAL JOURNAL
Extraction of Essential Oils from Lime (Citrus latifolia Tanaka) by Hydrodistillation and Supercritical Carbon Dioxide
Ana Cristina Atti-Santos , Marcelo Rossato
, Luciana Atti Serafini
, Eduardo Cassel
Brazilian Archives of Biology and Technology
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