There is a plethora of methods with which essential oils can be extracted aimed at food applications.l Essential oil composition and yield can differ greatly between extraction methods.l It is difficult to determine under which conditions the composition of the mixture of volatile compounds extracted reflectsthe actual composition.l Conventional methods such as distillation and expression are used most commonly to extract food grade essential oils.However, disadvantages such as long extraction times and degradation of essential oil compounds are a significant concern.l Super critical fluid extraction with the use of CO2 appears to be a clean and efficient technology to obtain essential oils andoffers many advantages over conventional extraction methods. Moreover, the possibility of obtaining a certain compositionby varying the process conditions during SFE is an advantage if a product with certain composition must be obtained. Onthe downside, it is considered a costly method.l SFME is another very promising extraction method able to produce high quality essential oils in a minimum amount oftime with low environmental impact.l Ultrasound, although of considerable cost, can significantly enhance conventional and novel/alternative extraction methodsin terms of extraction speed, yield, and quality of essential oil.l The seasonality/collection period of the plant material must be taken into account as it may influence the composition ofthe extracted essential oil
đang được dịch, vui lòng đợi..