Zeitschrift für Chromatographie und Trenntechniken
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Basic Essential Oil Extraction Techniques and Procedures from Aromatic Plants

Melese Damtew Asfaw

Essential oils are highly concentrated substances extracted from flowers, leaves, stems, roots, seeds, barks, resins, or fruit rinds. These oils are often used for their flavor and their therapeutic or odoriferous properties, in a wide selection of products such as foods, medicines, and cosmetics. Extraction of essential oils is one of the most time and effort consuming processes. The way in which oils are extracted from plants is important because some processes use solvents that can destroy the therapeutic properties. There are wide number of ways to extract the essential oil but the quality never remains the same. The primary purpose of this study was to evaluate the various processes for extraction of essential oils from medicinal plant and screening that we use in our daily research. Extraction techniques include steam distillation, hydro distillation, cold pressing, maceration, super critical carbon dioxide, effleurage and dry distillation. Following that, the numerous methodologies outlined above might be grouped and addressed in terms of targeted biological testing to help young researchers focus and direct their research.