食品科学 ›› 2012, Vol. 33 ›› Issue (6): 119-122.doi: 10.7506/spkx1002-6630-201206026

• 工艺技术 • 上一篇    下一篇

响应曲面法优化酸法魔芋葡甘露聚糖水解工艺

罗清楠1,2,3,谭玉荣1,刘 宏4,庞 杰3,赵国华1,2,*   

  1. 1.西南大学食品科学学院 2.重庆市农产品加工技术重点实验室 3.福建农林大学食品科学学院 4.中国农业科学院农业信息研究所
  • 出版日期:2012-03-25 发布日期:2012-03-03
  • 基金资助:
    国家“863”计划项目(2011AA100805-2);国家自然科学基金面上项目(31171654)

Optimization of Acid Hydrolysis of Konjac Glucomannan by Response Surface Methodology

LUO Qing-nan1,2,3,TAN Yu-rong1,LIU Hong4,PANG Jie3,ZHAO Guo-hua1,2,*   

  1. (1. College of Food Science, Southwest University, Chongqing 400715, China;2. Chongqing Key Laboratory of Agricultural Products Processing, Chongqing 400715, China;3. College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China ;4. Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, China)
  • Online:2012-03-25 Published:2012-03-03

摘要: 目的:探讨酸解法制备魔芋葡低甘聚糖工艺。方法:选定时间、水料比和温度作为影响因素,以魔芋葡甘低聚糖的特性黏度作为评价指标。在单因素试验的基础上,通过3因素3水平Box-Behnken组合试验,建立魔芋葡甘低聚糖特性黏度的二次多项式回归方程,经响应面回归分析得到优化组合条件。结果:最佳酸解条件为6mol/L HCl溶液与95%乙醇体积配比为3.8:96.2、反应时间50min、反应温度82℃。在此条件下特性黏度为55.613cm3/g,与理论最佳得率相近。结论:曲线回归方程与结果拟合性好,此模型合理可靠,具有现实意义。

关键词: 响应曲面法, 魔芋葡甘聚糖, 酸水解, 特性粘度

Abstract: Objective: To optimize the acid hydrolysis of konjac glucomannan (KGM) for preparing konjac oligo-glucomannan with low intrinsic viscosity by response surface methodology. Methods: Based on one-factor-at-a-time experiments, a three-variable, three-level Box-Behnken experimental design was applied to establish a quadratic polynomial model for the intrinsic viscosity of konjac oligo-glucomannan (KOGM) as a function of hydrolysis time, temperature and HCl-to-ethanol ratio. The results of response surface analysis indicated that the optimal hydrolysis condition were hydrolysis time of 50 min, HCl-to-ethanol ratio of 3.8% and hydrolysis temperature of 82 ℃. The experimental intrinsic viscosity of KOGM obtained under these conditions was 55.613 cm3/g, which was consistent with the theoretical value. The experimental data could be well fitted with the regression model established. Conclusion: The model is reliable and can be used in practice.

Key words: response surface methodology, konjac glucomannan, acid hydrolysis, intrinsic viscosity

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