Components analysis of polyphenolics extracted from oat vinegar with different solvents

The phenolic antioxidants in oat vinegar were analyzed.Ethyl acetate,ethanol and water were used as solvents.High performance liquid chromatography(HPLC)was applied to qualitative and quantitative determination of several oat vinegar polyphenol.The results showed that the ethyl acetate extract of oat vinegar contains the most of polyphenolics.Gallic acid in the ethanol extract was the highest while catechin was only detected in the ethanol.Other phenolics had the highest content in the ethyl acetate extract and that in water extract was the least both in kinds and contents.