超声辅助酶法提取山荆子果胶工艺优化及其红外光谱特征Optimization of Ultrasonic-Assisted Enzymatic Extraction of Pectin from Malus baccata (L.) Borkh. and Its Infrared Spectra Characteristics
李泽林,沈晋如,方敏瑞,赵春燕,范江平,沈晓静,郑婷婷
摘要(Abstract):
为研究超声辅助酶法提取山荆子果胶的工艺和其官能团组成,以丽江山荆子为原材料,在单因素实验的基础上采用响应面设计优化果胶的提取工艺,并采用傅里叶变换红外光谱(Fourier transform infrared spectroscopy, FT-IR)表征其结构特征。结果表明,最佳提取条件为超声时间24.23 min、酶解时间1.27 h、纤维素酶添加量3%,提取率为(17.70±0.28)%。该条件下提取的山荆子果胶总糖和多酚含量较高,分别为(78.59±3.76)%和(26.10±0.11)%,蛋白含量较低,为(0.20±0.07)%;此外,红外光谱显示山荆子果胶是一类含有典型多糖结构的高酯果胶。该研究可为云南丽江山荆子果胶的进一步开发利用提供依据。
关键词(KeyWords): 山荆子;果胶;响应面;提取工艺;傅里叶变换红外光谱
基金项目(Foundation): 云南省天然药物药理重点实验室开放研究基金项目(70120030506);; 国家自然科学基金项目(31560457)
作者(Author): 李泽林,沈晋如,方敏瑞,赵春燕,范江平,沈晓静,郑婷婷
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