不同提取方法对黄秋葵果胶含量和结构特性的影响

被引:12
作者
刘生 [1 ]
郑添妍 [1 ]
高晗 [1 ]
惠爱玲 [1 ]
张文成 [1 ]
张化伟 [2 ]
都标 [2 ]
机构
[1] 农产品生物化工教育部工程研究中心合肥工业大学
[2] 安徽阳光药业有限公司
关键词
黄秋葵果胶; 酸水热提; 酶解; 超声; 分子质量;
D O I
10.13982/j.mfst.1673-9078.2019.3.025
中图分类号
TS254.1 [基础科学];
学科分类号
083204 [水产品加工及贮藏工程];
摘要
本研究探讨了酸水热提、酶解、超声及酶解-超声四种提取方法对黄秋葵果胶含量及其结构特性的影响。酸水热提及酶解-超声联合法对黄秋葵果胶提取效果优于酶解和超声法;当干秋葵加入20倍pH 3 HCl水溶液,以70℃浸提1h(酸水热提法)或添加3‰果胶酶、50℃酶解90min后置于200W超声波处理10min(酶解-超声法)时,其果胶平均含量(以半乳糖醛酸质量分数计)达到43.61g/kg及32.59g/kg。四种提取方法所制果胶均为吡喃糖构型,但酸水热提及酶解法制备果胶的酯键易发生降解,其在1725cm-1红外吸收峰有变弱甚至消失趋势;而超声或酶解-超声法处理则促进了果胶分子链断裂,其平均分子量由酸水热提法下533ku分别降至420~467ku、319ku。研究结果表明:采用酸水热提法(pH 3、70℃)制备黄秋葵果胶,其果胶得率高、分子量分布集中、外观呈片状且排列致密。本研究结果为高品质秋葵果胶的制备奠定基础。
引用
收藏
页码:161 / 168
页数:8
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