食品科学

• 工艺技术 • 上一篇    下一篇

基于混合床离子交换树脂脱盐的草鱼肽及其理化性质

崔 诚,陈 悦,陈季旺,夏文水   

  1. 1.武汉轻工大学食品科学与工程学院,湖北 武汉 430023;2.江南大学食品学院,江苏 无锡 214122
  • 出版日期:2013-09-25 发布日期:2013-09-27

Desalination Using Mixed-Bed Ion Exchange Resin and Physiochemical Properties of Grass Carp Peptides

CUI Chen,CHEN Yue,CHEN Ji-wang,XIA Wen-shui   

  1. 1. College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China;
    2. School of Food Science and Technology, Jiangnan Unviersity, Wuxi 214122, China
  • Online:2013-09-25 Published:2013-09-27

摘要:

研究混合床离子交换树脂对草鱼肽的脱盐工艺条件,并分析脱盐后草鱼肽的理化性质。结果表明:脱盐的较佳工艺条件为上样质量浓度10mg/mL、流速6BV/h、pH7.0、阴阳离子树脂混合比例为2:3。在该工艺条件下,脱盐率达到81.7%,肽回收率为80.5%,草鱼肽灰分从17.5%降低到3.2%,肽含量从80.9%增加到90.3%。脱盐后草鱼肽的相对分子质量分布范围主要集中在190~1000之间,含量达到了91.5%;溶解度在pH2~10范围内均大于95%,溶液质量浓度达到40g/100mL时,其黏度只有4.5mPa·s,具有高质量浓度、低黏度的特点。

关键词: 草鱼肽, 混合床离子交换树脂, 理化性质

Abstract:

In the present study, we investigated the process conditions for desalinating grass carp peptides (GCPs) using
mixed-bed ion exchange resin and characterized desalinated GCPs. The optimal desalination conditions for GCPs were
sample concentration of 10 mg/mL, loading flow rate of 6 BV/h, pH 7.0 and anion/cation exchange resin ratio of 2:3. Under
these conditions, the desalination rate was 81.7% and the peptide recovery was 80.5%; meanwhile, the ash content in GCPs
was reduced from 17.5% to 3.2%, and the peptide content was increased from 80.9% to 90.3%. The relative molecular mass
of desalinated GCPs was mostly distributed in the range of 190 to 1000 in an amount of 91.5%, solubility was greater than
95% in the pH range of 2 to 10, and viscosity was only 4.5 mPa•s at the concentration of 40 g/100 mL.

Key words: grass carp peptides, mixed-bed ion exchange resin, physiochemical properties