Effect of solvent on solid-liquid extraction of phenolic compounds from walnut (Juglans regia L.) Membrane septum

Abstract

The extractive efficiency of phenolic compounds from plant material is greatly depended on the solvent. In conventional processes polyphenols are extracted from vegetable material using different solvents in a temperature range from 40 to 90 0 C. In this study, was proposed to extract polyphenolic compounds from walnut membrane septum (woody septum) using the Soxhlet extraction, and water ethanol as a solvent mixtures with different concentrations as a solvent. The obtained extracts were evaluated for total polyphenol content by Folin-Ciocalteu method, and UV spectra of the investigated extracts were also analyzed. In the course of these studies it was found that optimum ratio of water and ethanol for the extraction of polyphenols from walnut membranes is 30% of the mixture.