Abstract
Essential oils and oleoresins are the secondary metabolites of spice origin and have wide application in the food industry because of their flavour and aroma. They are recovered by various extraction techniques. Both conventional and emerging techniques are being utilized for this purpose. Conventional methods of spice extraction include, distillation and solvent extraction. Continued search for better extraction techniques finally ended up in the development of various advanced technologies. Methods such as supercritical fluid extraction, microwave assisted extraction, enzyme assisted extraction and ultrasound assisted extractions fall under emerging extraction techniques. These advanced technologies helped to solve the limitations in conventional methods. Selection of extraction technique depends on the requirement and economic feasibility. This review deals with the emerging techniques involved in the extraction of essential oils and oleoresins.
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