A Review on Extraction of Tannins and Quantitative Determination of Ellagic Acid Using Different Analytical Methods

Abstract

Tannins, integral to plant survival, serve diverse functions from herbivore defence to influencing plant development. Classified into hydrolyzable and condensed types, these water-soluble polyphenols contribute to the nutritional profile of plant-based meals, offering taste, colour, and potential health benefits. Extraction methods, including solvent and ultrasonic-assisted techniques, play a crucial role in obtaining concentrated tannins. Ellagic acid, abundant in plants like strawberries and grapes, garners attention for its health-promoting properties. Analytical methods such as spectrophotometry and chromatography, including HPLC, enable the precise identification and quantification of ellagic acid. These tools contribute to a deeper understanding of plant chemistry and its potential health implications. In a nutshell, tannins go beyond herbivore defence, influencing plant biology and human health. This review highlights their diverse roles, extraction methods, and the significance of ellagic acid, providing insights into the intricate world of plant polyphenols.