柚皮果胶理化性质的研究

被引:27
作者
田宝明
彭林
吴金松
李俊
刘雄
王倩倩
机构
[1] 西南大学食品科学学院重庆市农产品加工及贮藏重点实验室
关键词
柚皮; 果胶; 提取率; 理化性质;
D O I
10.13386/j.issn1002-0306.2014.08.063
中图分类号
TS255.1 [基础科学];
学科分类号
083203 [农产品加工及贮藏工程];
摘要
以柚皮干粉为原料提取果胶,采用正交实验优化柚皮果胶提取工艺,并对其理化性质进行检测。研究表明在提取温度100℃,pH2.0,时间60min,料液比1∶50(g/mL)的条件下柚皮果胶的得率最高,为27.06%,纯度达84.3%,酯化度为73.75%,所得果胶为淡黄色。常温下pH为4.86,属于酸性高酯果胶。柚皮果胶的溶解度随温度升高而增大、随着pH增大,溶解度有下降的趋势;柚皮果胶的热稳定性优于商品果胶,但随着时间增加迅速降低,15min后趋于稳定;柚皮果胶粘度与果胶浓度和蔗糖浓度的正相关,随pH的增大和温度的升高而下降;柚皮果胶理化性质与商品柑橘果胶相似,柚皮果胶的粘度和乳化性能优于商品柑橘果胶。实验结果表明柚皮果胶是一种优质的果胶。
引用
收藏
页码:313 / 317+363 +363
页数:6
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