Sunflower Protein Concentrates and Isolates’ Low in Polyphenols and Phytate

摘要

ABSTRACTProtein concentrates and isolates from sunflower (Helianthus annuusL.), essentially free of polyphenols and/or low in phytate, were prepared from dehulled seeds by a sequential extraction procedure using organic solvents, such as hexane for defatting and acidic butanol for removing polyphenols. Phytate was removed by aqueous extraction and separation at acidic and/or alkaline conditions, depending on the relative solubility of the protein and phytate. Reduced‐phytate concentrates and isolates developed off‐colors unless the polyphenol concentration was less than 0.05. The protein solubility profile of the reduced‐phytate products was much better than that of the defatted meal, especially below the isoelectric