What are the methods used to extract essential oil from plants?
The methods used to extract essential oil from these plants are; steam distillation (SD), solvent-assisted extraction, hydro distillation (HD), ultrasonic-assisted extraction, supercritical fluid extraction and solvent-free microwave extraction ( Belhachat et al., 2018 ). Oil extraction techniques are classified as shown in Fig. 1.
How a solvent is extracted?
Thi s solvent may be an organic solvent or extraction. The modern routes were developed using novel technologies, as displayed in Fig. 1. 3.2.1. Solvent extraction while mixing with a so lvent. Those methods are maceration, infusion dig estion, decoction, an d percolati on. Soxhlet extraction was devel oped in the 18 th century.
What are the different types of essential oil extraction techniques?
Microwave-assisted extraction and supercritical fluid extraction are two of the latest essential oil extraction techniques that have received considerable interest. 1. Introduction Essential oil (EO) is a secondary metabolite synthesized by medicinal and aromatic plants. It represents less than 5% of the total plant composition.
What solvent is used to extract essential oil?
Different solvents including acetone, hexane, petroleum ether, methanol, or ethanol can be used for extraction (Areias and others 2000; Pizzale and others 2002; Kosar and others 2005 ). For general practice, the solvent is mixed with the plant material and then heated to extract the essential oil, followed by filtration.
