响应面法优化磨盘柿果胶的提取工艺

为了充分开发磨盘柿资源,以磨盘柿加工柿子酒后的废弃物-柿子渣为原料,对果胶的提取工艺进行了研究。采用草酸铵提取法对柿子渣的果胶进行提取,单因素实验考察了提取时间、提取温度、提取液pH、料液比、草酸铵浓度对提取率的影响,并利用响应面分析法对果胶的提取工艺进行了优化。结果表明,最佳的提取条件为:草酸铵浓度为0.60%,提取温度95℃,反应时间4 h,pH1.9,在此条件下果胶的提取率为11.2%±0.3%。通过此方法,能够有效地提取出果渣中的果胶,为磨盘柿子的综合开发提供了思路。

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.