食品科学 ›› 2010, Vol. 31 ›› Issue (8): 137-142.doi: 10.7506/spkx1002-6300-201008029

• 工艺技术 • 上一篇    下一篇

响应面法优化微波辅助提取普洱茶中茶色素工艺研究

龚文琼,刘 睿*   

  1. 华中农业大学食品科学技术学院
  • 收稿日期:2009-05-21 修回日期:2009-09-02 出版日期:2010-04-15 发布日期:2010-12-29
  • 通讯作者: 刘睿 E-mail:liurui@mail.hzau.edu.cn

Optimization of Microwave-assisted Extraction of Pu er Tea Pigments via Response Surface Methodology

GONG Wen-qiong,LIU Rui*   

  1. (College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China)
  • Received:2009-05-21 Revised:2009-09-02 Online:2010-04-15 Published:2010-12-29
  • Contact: LIU Rui E-mail:liurui@mail.hzau.edu.cn

摘要:

研究云南普洱茶中茶色素的提取工艺。采用微波辅助提取方法,在研究提取时间、料液比、微波功率及提取次数等单因素试验基础上,进行二次正交旋转组合试验,采用响应面法分析和典型性分析,确定普洱茶中茶色素的最优提取工艺。结果表明:提取时间对提取得率有极显著影响(P < 0.01),微波功率对提取得率有较显著影响(P < 0.05),而料液比对提取得率的影响不显著,最优化的提取工艺为提取时间9.48min、微波功率640W、料液比1:58.79,在该条件下进行微波辅助提取,普洱茶中茶色素的提取得率能达到理论预测值的97.5%。

关键词: 茶色素, 微波辅助提取, 响应面分析

Abstract:

Microwave assistance was used to extract Pu er tea pigments with water as extraction solvent. On the basis of single factor experiments, in which the respective effects of technological parameters including material/liquid ratio, microwave power, and extraction time and number on Pu’er tea pigment yield were examined, quadratic orthogonal rotation combination design combined with response surface methodology was employed to optimize 3 crucial ones of the above parameters such as material/liquid ratio, microwave power and extraction time. Computer generated response surfaces, canonical analysis and contour plot interpretation revealed that extraction time had an extremely significant effect on Pu er tea pigment yield (P<0.01), microwave significantly affect Pu er tea pigment yield (P<0.05), whereas no significant effect on Pu er tea pigment yield was observed from material/liquid ratio. The extraction for 9.48 min with 640 W microwave assistance at a material/liquid ratio of 1:58.79 resulted in a maximum Pu er tea pigment yield. The experimental value was up to 97.5% of the predicted value.

Key words: er tea pigments, microwave-assisted extraction, response surface analysis

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