Study on ultrasonic assisted alkaline extraction of soluble dietary fiber from jackfruit seeds
The soluble dietary fiber was extracted from jackfruit seeds by ultrasonic assisted alkali method.On the basis of single factor experiment,the extraction conditions of soluble dietary fiber from jackfruit seeds were optimized by response surface methodology with the ratio of liquid to material,pH of extract,ultrasonic time,and ultrasonic temperature as the influencing factors,and the yield of soluble dietary fiber as the response value.The results indicate that the optimal extraction conditions are:α-The addition amount of amylase is 0.50％,the solid-liquid ratio is 1∶14 g/mL,the pH of the extraction solution is 12,the ultrasound time is 30 minutes,the ultrasound temperature is 50 ℃,and the yield of soluble dietary fiber reaches 12.43％.The swelling power,water holding capacity and oil holding capacity of jackfruit seed soluble dietary fiber powder prepared and treated under these conditions were 6.03 mL/g,3.21 g/g and 2.16 g/g respectively.The swelling power,water holding capacity and oil holding capacity of this soluble dietary fiber were good.
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