长节箬竹叶茶多酚微波辅助提取工艺

Optimization of microwave-assisted extraction and determination of TP(tea polyphenols) in Indocalamus leaves

以长节箬竹叶为原料,采用单因素试验和正交试验,探讨浸提温度、乙醇浓度、料液比、浸提时间等对竹叶茶多酚浸出率的影响,并以浸出率为评价指标,优化提取工艺。实验结果表明,微波辅助提取长节箬竹叶茶多酚的最佳工艺条件为:浸提温度70℃、乙醇体积分数70%、料液比1∶20(g/mL),在200 W微波功率下浸提20 min。在此条件下,长节箬竹叶茶多酚的浸出率为6.24%。

Microwave-assisted extraction of tea polyphenols（TP） from Indocalamus longiauritus leaves powder was investigated by single factor and orthogonal experiments,and effects of solid/liquid ratio,consistency of ethanal,extraction temperature and time,and microwave power on TP yield were examined.The optimal extraction conditions were determined as follows：extraction temperature 70℃,70% ethanal,materical/liquid ratio 1∶20（mL/g） microwave power 200 W and extraction time 20 min.Under such conditions,the yield of TP was 6.24%.