黄秋葵多糖提取及其絮凝性能  

Extraction and flocculation properties of okra polysaccharide

作　　者：王炜强 李本刚[1] 罗振扬[1] 周伟健 朱丽珺[1] WANG Wei- qiang LI Ben- gang LUO Zhen- yang ZHOU Wei-jian ZHU Li-jun(College of Science, Nanjing Forestry University, Nanjing 210037, China)

机构地区：[1]南京林业大学理学院,江苏南京210037

出　　处：《食品工业科技》2017年第21期76-79,95,共5页Science and Technology of Food Industry

基　　金：江苏省自然科学基金(BK20140967)

摘　　要：以水、酸、碱为浸提液,利用超声辅助法从黄秋葵果中提取了三种多糖,并以红外光谱和凝胶渗透色谱对其进行了表征。结果表明,三种多糖的组成基本相同,分子量不同。利用黄秋葵多糖、硫酸铁和硫酸铁-黄秋葵多糖复合絮凝剂对高岭土悬浊液处理表明,单独添加黄秋葵多糖时絮凝效果差;单独用硫酸铁时,只有Fe^(3+)离子浓度接近0.1 mmol/L时才能达到90%左右的絮凝率;三种黄秋葵多糖与硫酸铁复合可在0.1~0.6 mmol/L的Fe^(3+)离子浓度范围内达到90%左右的絮凝率,絮凝时间也短。碱提多糖对提高絮凝率和缩短絮凝时间的效果最好,其次是酸提、水提多糖。Three kinds of polysaccharide were extracted from okra fruit by ultrasonic technology using water, acid and alkali as soaking solvents.They were characterized by infrared spectroscopy and gel permeation chromatography.The results showed that three kinds of polysaccharide had almost the same composition and different molecular weight. Using kaolin suspensions as flocculating object, the flocculation properties of okra polysaccharide, ferric sulfate and ferric sulfate-okra polysaccharide composite flocculant were investigated.The results suggested that poor flocculation properties were exhibited by adding only okra polysaccharide as flocculant.Only the concentration of Fe^3＋ close to 0.1 mmol/L, ferric sulfate could reach flocculation rate of 90%.However,ferric sulfate-okra polysaccharide composite flocculant could reach flocculation rate of 90% in a wide Fe^3＋ concentration range of 0.1-0.6 mmol/L,and the flocculation time was also short.The order of flocculation rate from high to low and flocculation time from short to long was okra polysaccharide extracted by alkaline, okra polysaccharide extracted by acid and okra polysaccharide extracted by water.

关 键 词：黄秋葵多糖 硫酸铁 复合絮凝剂 絮凝率 絮凝时间 

分 类 号：TS201.2[轻工技术与工程—食品科学]