Plant phenolics: a review on modern extraction techniques
Interest in the development of procedures for extraction of bioactive compounds from natural sources has increased in recent years due to the potential applications of these compounds in food, chemical and pharmaceutical industries. The retrieval of phenolics from plant materials is greatly influenced by the extraction procedure employed and related factors. This chapter provides an updated overview of the methods used to extract phenolic compounds from plant sources, ranging from more traditional to advanced extraction processes. Problems associated with conventional extraction procedures led to demand for alternative techniques for extraction of phenolic compounds and several new extraction techniques have been developed and refined in last two decades because of their potential to efficiently extract a great variety of valuable phenolic compounds. Some promising extraction protocols used to extract the different type of plant phenolics are discussed in detail.