离子交换法提取木瓜皮中果胶的动力学研究  

Kinetics Study on Extraction of Pectin from Papaya Peel by Ion Exchange Method

作　　者：顾焰波[1] 江冰[1] GU Yan-bo;JIANG Bing(Taizhou Institute of Science and Technology,NJUST,Taizhou 225300,China)

机构地区：[1]南京理工大学泰州科技学院,江苏泰州225300

出　　处：《中国调味品》2020年第5期186-190,共5页China Condiment

基　　金：江苏省高等学校自然科学研究面上项目(18KJB530010)。

摘　　要：以木瓜皮为原料,分别研究了离子交换树脂法和酸提法提取果胶的动力学模型,获得速率常数和表观活化能,经过有效性检验和模型预测能力验证,模型均能很好预测果胶提取的动力学过程。离子交换法提取果胶的活化能Ea为23.68kJ/mol,与酸提法获得的37.88kJ/mol相比明显降低,离子交换树脂法提取木瓜皮中果胶明显优于酸提法。在树脂用量为5%、料液比为1∶30(g/mL)、浸提液pH值为1.5条件下,离子交换树脂法提取木瓜皮中果胶的最佳浸提温度为80℃,动力学分析优化最佳结果,得Tmax=117.3min,果胶得率达17.47%,与试验结果相吻合。Using papayapeel as the raw material,the kinetics model of pectin extracted by ion exchange resin and acid extraction methods is studied,and the rate constant and apparent activation energy are obtained.After validation of validity test and model prediction ability,the model could predict the kinetics process of pectin extraction well.The activation energy Ea of pectin extracted by ion exchange method is 23.68 kJ/mol,which is significantly lower than that by acid extraction method(37.88 kJ/mol).The pectin extracted by ion exchange resin method is obviously better than that by acid extraction method.The optimum extraction temperature of pectin from papayapeel by ion exchange resin method is 80℃under the conditions of resin dosage of 5%,solid-liquid ratio of 1∶30(g/mL)and pH value of 1.5,and the optimum results are optimized by kinetics analysis.Tmax=117.3 min and the yield of pectin is 17.47%,which are consistent with the experimental results.

关 键 词：离子交换法 木瓜皮 果胶 动力学模型 

分 类 号：TS201.1[轻工技术与工程—食品科学]