Comparative analysis of the oil and supercritical CO2 extract of Cymbopogon citratus Stapf.

被引：26

作者：

Marongiu, Bruno ^{[1
]}

Piras, Alessandra ^{[1
]}

Porcedda, Silvia ^{[1
]}

Tuveri, Enrica ^{[1
]}

机构：

[1] Univ Cagliari, Dipartimento Sci Chim, I-09042 Cagliari, Italy

来源：

NATURAL PRODUCT RESEARCH | 2006年 / 20卷 / 05期

关键词：

Cymbopogon citratus Stapf; lemon grass; essential oil; supercritical carbon dioxide;

D O I：

10.1080/14786410500277837

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Dried and ground leaves of lemon grass (Cymbopogon citratus Stapf.) were used as a matrix for supercritical extraction of essential oil with CO2. The objective of this study was to analyze the influence of pressure on the supercritical extraction. A series of experiments were carried out, for 360 min, at 50 degrees C and at different pressures: 90, 100, 110 and 120 bar. Extraction conditions were chosen to maximize citral content in the extract oil. The collected extracts were analysed by GC - MS and their composition was compared with that of the essential oil isolated by hydrodistillation and by steam distillation. At higher solvent density the extract aspect changes passing from a characteristic yellow essential oil to yellowish semi-solid mass because of the extraction of high molecular mass compounds. The optimum conditions for citral extraction were 90 bar and 50 degrees C, at these conditions citral represent more than 68% of the essential oil and the extraction yield was 0.65% while the yield obtained from hydrodistillation was 0.43% with a content of citral of 73%.

引用

页码：455 / 459

页数：5

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