摘要
[目的]研究微波辅助提取普洱茶中茶褐素的工艺,为普洱茶加工和普洱茶深层次开发与应用提供理论指导。[方法]以普洱茶为原料,茶褐素得率为指标,采用微波辅助提取普洱茶中的茶褐素,在单因素试验基础上采用正交试验,并对所得茶褐素进行红外光谱扫描和主要理化性质分析。[结果]对茶褐素产率影响最大的是提取次数,其次是料液比,微波功率和提取时间影响最小,提取次数和料液比对产率有显著性影响。微波辅助提取普洱茶中茶褐素的优化工艺条件为提取次数2次,料液比1∶15 g/ml,提取时间10 min,微波功率320 W,在此条件下产率达到16.83%。茶褐素是弱酸性物质,含有蛋白质、多糖化合物。[结论]微波辅助提取普洱茶中的茶褐素是一种较理想的工艺。
[ Objective ] To study the microwave-assisted extraction of theabrownine from Pu-erh tea, so as to provide theoretical guidance for the deep processing and development of Pu-erh tea. [ Method] Theabrownine was extracted from Pu-erh tea by the microwave-assisted method, an orthogonal experiment was conducted based on single factor test, and then the physiochemical properties of theabrownine were analyzed with infrared spectrum. [ Result] The yield of theabrownine was significantly influenced by the extraction frequency and solid-liquid ratio, while slightly affected by microwave power and microwave time. The best microwave-assisted extraction conditions were twice of extraction, 1：15 g/ml of solid-liquid ratio, 10 min of extraction time and 320 W of microwave power, under which the yield of theabrownine could reach up to 16.83%. Theabrownine is weak acidic, and it contains proteins and polysaccharides. [ Conclusion] Microwave-assisted technology is an ideal method to extract theabrownine from Pu-erh tea.
出处
《安徽农业科学》
CAS
2012年第22期11421-11422,共2页
Journal of Anhui Agricultural Sciences
基金
云南省教育厅科学研究基金项目(08C0186)
关键词
微波辅助提取
普洱茶
茶褐素
Microwave-assisted extraction
Pu-erh tea
Theabrownine
