Effects of different methods on polyphenols extraction from walnut green husk

In order to research the influence of different methods on polyphenols extraction from walnut green husk, ethanol was taken as extraction solvent, and the effects of different methods (solvent extraction, microwave extraction, ultrasonic extraction and sodium hexametaphosphate extravtion) on polyphenols extraction from walnut green husk were researched. The results showed that the yield of SHMP assisted microwave extraction was found to be superior to other methods, its yield was 4.01 mg/g. The yield of SHMP assisted microwave extraction was 73.4% higher than solvent extraction. Therefore, SHMP assisted microwave extraction method is a kind of new, more efficient polyphenols extraction method from walnut green husk.