Supercritical CO2 Extraction of Volatile Oil from Rose Concrete

Abstract

Essences srl, Via V. Veneto 8, 84019 S. Marzano sul Sarno (SA), ItalyRose concrete obtained from Rosa damascena Mill. was fractionated by supercritical CO 2 extraction at 80 bar pressure and 408C temperature by using a two-stage separation procedure. Two products, containing mainly parans and volatile oil, were recovered in the ®rst and in the second separator, respectively. The volatile oil was analysed by GC±MS and compared with the products obtained from rose concrete by steam distillation and ethyl alcohol solubilization. The supercritical rose oil and the steam distilled product had very dierent compositions. The major dierence was in the 2-phenylethanol content which was 50.0% in the SFE product and 10.4% in the steamdistilled rose oil. The liquid product obtained by ethyl alcohol solubilization contained 28.3% of 2-phenylethanol but more than 46% of parans, whereas the supercritical volatile oil contained only 15.1% of these compounds. # 1997 by John Wiley & Sons, Ltd.

Chemical characterization and in vitro antioxidant and antimicrobial activities of essential oil from Commiphora wildii Merxm. (omumbiri) resin

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