Optimization of Extraction Process of Pectin from Mopan Persimmon by Response Surface Method

In order to fully develop mopan persimmon resources,the extraction technology of pectin from mopan persimmon wine processing waste-persimmon residue was studied. Pectin from mopan persimmon with the method of ammonium oxalate,single factor experiments of pectin extraction were carried out to get the effects of reaction temperature,time,pH,solid-liquid ratio,concentraction of ammonium oxalate. Response surface experiments were designed to optimize the parameters of extraction. The optimal condition was:0.60% of ammonium oxalate,pH1.90,95℃,4 h of time,1:15 of solid-liquid ratio,under these conditions the extraction rate of crude pectin was 11.2%±0.3%.Through this method,the pectin in the fruit residue could be extracted effectively,which provided an idea for the comprehensive development of the mopan persimmon.