Study of Extraction of Tannic Acid from Emblica Officinalis (Amla)

Traditional medicinal plants have stood up to the test of time and its active ingredients were used for preservatives and therapeutic medicine to the modern science. The fruits of terminalia chebula (baheda), terminalia ballerica (baheda), Emblica officinalis (Amla) were contains tannic acid among, it is one of the richest source of tannic acid. There are various methods for the extraction of tannic acid from Emblica Officinalis such as conventional batch extraction and novel extraction technique etc. This work represents impact of various experimental conditions such as temperature, solid loading and particle size on the extraction of phenol from dry fruits of Emblica officinalis. Extraction of tannic acid is performed with distilled water. Distilled water is found to be the best solvent from literature for tannic acid. Increase in temperature of process results into increase in solubility and diffusion coefficient because it destructed cellular structure of solid matrix. This study shows extraction rate is increased with increase in particle size, which is because of decrease in diffusion path length. With increase in solid loading suspension becomes more viscous. It is difficult for solvent molecules to diffuse inside solid matrix. Therefore, as the solid loading increases, % extraction of tannic acid decreases.