金花茶多酚提取工艺的研究

Extraction of Tea Polyphenols in Camellia Chryscath

摘要:

本文研究了金花茶干叶中多酚提取的工艺条件。通过单因素实验考察了微波辅助提取过程中乙醇浓度、微波功率、微波处理前后物料的浸泡时间、微波处理时间、料液比和pH值等多种因素对金花茶多酚得率的影响。并通过正交试验进行优化，得出最佳提取工艺为：提取溶剂30%乙醇，料液比1:30，常温浸泡20 min，500 w微波处理40 s后再常温浸泡1 h，在此工艺下金花茶多酚得率为9.36%。

Abstract:

The extraction of tea polyphenols (TPs) in dry Camellia chryscath was studied. The influence of some key factors on TPs extraction yield was investigated and the optimal ethanol concentration, solid-liquid ratio, microwave power, microwave heating time, dipping time under normal temperature before and after microwave treatment were found to be 30%, 1:30, 500 w, 40 s, 20 min and 1 h, respectively. Under the optimized extraction conditions, the extraction yield of TPs reached 9.36%.