Recent advances on supercritical fluid extraction of essential oils

Abstract

Supercritical fluid extraction (SFE) is one of the most commonly used extraction techniques in the course of analysis or preparation. It is environmentally friendly and has some advantages over other conventional extraction methods. This review covers the recent developments of SFE in the extraction of essential oils from the plant materials during the period 2005 to 2011, in particular some factors influencing SFE extraction yield, its characteristics and applications.

Comparison between Supercritical CO2 Extraction and Hydrodistillation for Two Species of Eucalyptus: Yield, Chemical Composition, and Antioxidant Activity

“…Hydrodistillation (HD) and solvent extraction have been the major processes for a long time. During last decades, the use of supercritical fluids for extraction of plant volatile fraction has been increasingly proposed (Pourmortazavi and Hajimirsadeghi ; Xu and others ). This is due to the advantages of the supercritical carbon dioxide extraction (SCE) technique: rapid, selective, and convenient technique for extraction of natural compounds from aromatic and medicinal plants.…”

An original approach for lipophilic natural products extraction: Use of liquefied n-butane as alternative solvent to n-hexane

“…In the last decades, research for new solvents has revived the interest for the use of liquefied gases as extraction solvents. Many studies have been performed on natural product extraction using supercritical CO 2 , but the high working pressure (7.5e45 MPa) has limited the industrial applications (Baysal, Ersus, & Starmans, 2000;Ben Rahal, Barba, Barth, & Chevalot, 2015;Coelho et al, 2012;Couto et al, 2010;Hubert & Vitzthum, 1978;Koubaa et al, 2015;Koubaa et al, 2016;Xu et al, 2011). More recently, some studies have been focused on extraction processes involving liquefied gases at lower pressure (200e1000 kPa), such as n-propane (da Sekhon, Maness, & Jones, 2015;Zanqui et al, 2015), n-butane (Novello et al, 2015;Yang, Teo, & Xu, 2004), dimethyl ether (Kanda & Li, 2011;Kanda & Makino, 2009;Oshita et al, 2015), tetrafluoropropene (Suberu, Yamin, Cornell, Sam, & Lapkin, 2016), tetrafluoroethane (Lapkin, Plucinski, & Cutler, 2006;Mustapa, Manan, Mohd Azizi, Nik Norulaini, & Omar, 2009), eventually with co-solvents (Jesus et al, 2013;Pessoa et al, 2015).…”

Chemical Composition and Antioxidant and Antimicrobial Properties of the Essential Oil of Hyssopus officinalis L

“…Isopinocamphone (57.27%), β-pinene (7.23%), terpinen-4-ol (7.13%), pinocarvone (6.49%), carvacrol (3.02%), p-cymene (2.81%) and myrtenal (2.32%) were also found to be the main chemical components of the essence of hyssop collected from the southeastern region of Anatolia, Turkey (22). Research suggests that several factors affect the composition of the essences extracted from a special plant species, including the region geographical conditions, harvesting season, plant's age, agricultural operations, plant growth stage and extraction methods and conditions (23).…”