Optimization of acid extraction of soluble dietary fiber from grape peel residue
To optimize the extraction of SDF from grape skin residue by acid method.Orthogonal test was carried out on the basis of single factor to determine the best process combination.the optimal combination of acid extraction was as follows:hydrochloric acid concentration 0.40 mol/L,water bath temperature 85 ℃,extraction time 80 min,solid-liquid ratio 1:20.Under this condition,the yield of SDF was the highest,which was 6.07％.The method is feasible.It can not only carry out deep processing of grape skin residue,but also avoid environmental pollution,which is beneficial to enhance the added value of grape,and provide certain technical support for acid extraction of SDF.
grape peel residuesoluble dietary fiberacid methodorthogonal test
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