In the present thesis,the purple sweet potato residue(PSPR)after beingextracted pigment,as the raw material, was studied for its comprehensiveutilization.The main contents include:the ultrasonic extraction of pigment fromPSPR,the preparation of starch from PSPR,the physicochemical properties ofpurple sweet potato starch(PSPS),ordinary PSPR powder and super-fine PSPRpowder.
(1)Study on the ultrasonic extraction of pigment from PSPR
On the basis of single factor experiment,the optimum ultrasonic extra...