食品科学

• 工艺技术 • 上一篇    下一篇

响应面法优化乳脂肪酶解的工艺

黎海彬,姚正晓,刘慧娟,江津津,陈 林,张 挺   

  1. 1.广州城市职业学院,广东 广州 510405;2.广西工学院,广西 柳州 545006
  • 出版日期:2013-07-25 发布日期:2013-08-02

Optimization of Enzymatic Lipid Hydrolysis of Cream by Response Surface Methodology

LI Hai-bin,YAO Zheng-xiao,LIU Hui-juan,JIANG Jin-jin,CHEN Lin,ZHANG Ting   

  1. 1. Guangzhou City Polyechnic, Guangzhou 510405, China;2. Guangxi University of Technology, Liuzhou 545006, China
  • Online:2013-07-25 Published:2013-08-02

摘要:

通过选用脂肪酶Palatase 20000L对奶油中乳脂肪酶解的单因素研究,确定了5个影响乳脂肪酶脂解率的关键因素,其中选定酶添加量为0.25%(以底物干质量计),反应时间6h,并对底物添加量、酶解温度和pH值采用Box-Behnken试验设计,进行三因素三水平响应曲面分析,以脂解率为响应值建立二次多项回归模型,并验证模型的有效性。结果表明:乳脂肪酶解的最佳工艺条件为底物添加量83.3%、酶解温度51℃、pH8.2,在此条件下进行乳脂肪酶解重复实验,脂解率为28.77%。

关键词: 脂肪酶Palatase 20000L, 酶解, 脂解率, 响应面法

Abstract:

Response surface methodology was applied to optimize the enzymatic lipid hydrolysis of cream by lipase
palatase 20000L. The optimum hydrolysis time and enzyme dosage were found to be 6 h and 0.25% (relative to the dry
weight of the substrate), respectively as demonstrated by preliminary investigations. Three other important hydrolysis
conditions, substrate concentration, temperature and pH, were optimized by response surface analysis based on a three-level
Box-Behnken experimental design to obtain maximum lipolysis efficiency. A quadratic polynomial regression model was
established and validated. The optimal substrate concentration, temperature and pH were 83.3%, 51 ℃ and 8.2, respectively.
Lipid hydrolysis under the optimized conditions gave rise to the highest lipolysis efficiency of 28.77%.

Key words: lipase palatase 20000L, enzymolysis, lipolyzed rate, response surface methodology