酸法水解提取西瓜皮中果胶工艺研究

[目的]获得西瓜皮中果胶提取的最佳工艺条件,为西瓜皮功能成分的利用提供技术支持。[方法]以西瓜皮为原料,采取酸法水解,对果胶制备的工艺条件进行了研究。在单因素试验的基础上,采用L9（34）正交试验确定西瓜皮中果胶提取的最佳工艺条件。[结果]西瓜皮中果胶提取最佳工艺条件为：水解时间60 min,水解温度85℃,水解酸度（pH）为2.5,料液比1∶10,按照此条件进行3次提取,测得西瓜皮中果胶的平均产率为13.3%。[结论]研究提高了西瓜深加工产品的附加值,对农业资源综合利用和降低环境污染具有重要意义。

Study on Extraction Technique of Pectin from Watermelon Peel by Acid Hydrolysis

[Objective] The aim was to obtain optimum conditions for extracting pectin from watermelon peel,which will provide technique support for utilizing functional components of watermelon peel.[Method] With watermelon peel as material,by using acid hydrolysis,the technique conditions for preparing pectin were studied.Based on single factor test,the optimum technique conditions were obtained by using L9(34)orthogonal test.[Result] The optimal processing conditions were as follows: the hydrolysis time was 60 min,the hydrolysis temperature was 85 ℃,the pH value was 2.5,the solid-liquid ratio was 1∶10,the extraction times was three,the average rate of pectin production was up to 13.3% under this condition.[Conclusion] The study will improve added value for watermelon further processed products,and has significance for comprehensive utilization of agricultural resources and reducing environment pollution.