Anthocyanin: a review of the technologies for obtaining the compound
DOI:
https://doi.org/10.5902/2179460X84237Keywords:
Extraction, Antioxidant activity, Phenolic compound, AnthocyanidinsAbstract
Anthocyanins are phenolic compounds with high antioxidant properties obtained from plant sources, such as leaves, flowers, and fruits. As it is a thermosensitive compound, it requires a lot of control over the extraction method so that there is no degradation or reduction of antioxidant activity. In this context, this work presents a systematic review about anthocyanin extraction as well as a discussion of parameters that strongly influence the yield and amount of extracted anthocyanins, such as types of solvents and acidifiers, extraction time, solid-liquid ratio, and temperature. It was observed that solvent extraction and ultrasonic assisted extraction are the most used techniques, as well as methanol and ethanol, the most used solvents. The extraction is independent of the raw material but is optimized when performed at low pH and milder temperatures. The preference for polar solvents also stands out, due to the better solubility in relation to the bioactive ones.
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