Pressurized liquid extraction as a green approach in food and herbal plants extraction: A review

Pressurized liquid extraction is a “green” technology for the extraction of nutraceuticals from foods and herbal plants. This review discusses the extraction principles and the optimization of the extraction parameters that improves the extraction efficiency. The use of different solvent mixtures and other extraction additives to enhance the efficiency of the extraction are discussed. Dynamic mode of extraction in Pressurized liquid extraction, and the use of combined and hyphenated sample preparation and analytical techniques are presented. This work discusses how different studies used Pressurized liquid extraction to enrich phenolic compounds, lignans, carotenoids, oils and lipids, essential oils and other nutraceuticals from foods and herbal plants.

► Pressurized liquid extraction (PLE) improves the extraction yield, decreases time and solvent consumption, and protects sensitive compounds.
► PLE facilitates the use of solvent mixtures and other extraction additives that would enhance the extraction efficiency.
► The use of combined and hyphenated results in a substantial decrease in the amount of sample used with better efficiency and selectivity.
► Different studies discuss using PLE to enrich phenolic compounds, lignans, carotenoids, essential oils and other nutraceuticals from foods and herbal plants.