响应面法优化万源富硒红茶茶多酚提取工艺

Optimization of Extraction Process of Tea Polyphenols from Wanyuan Selenium-Rich Black Tea by Response Surface Methedology

摘要: 响应面法优化万源富硒红茶中茶多酚提取工艺，以茶多酚提取率为指标，通过单因素试验考察乙醇浓度、超声温度、液料比、超声时间对万源富硒红茶茶多酚提取率的影响，响应面法优化万源富硒红茶茶多酚的超声波乙醇辅助提取工艺。结果表明，万源富硒茶在固定超声功率为360 W下的最佳提取工艺为：乙醇浓度为41%，超声时间为50 min，液料比为25:1 mL/g，超声温度为60℃，茶多酚提取率为16.12%。该法提取效率高，为万源富硒红茶中茶多酚开发利用提供理论依据。

Abstract: Optimization of extraction process of tea polyphenols from Wanyuan selenium-rich black tea by re-sponse surface methodology, with the extraction rate of tea polyphenols as an index, the effects of ethanol concentration, liquid to material ratio, ultrasonic temperature and ultrasonic time on the extraction rate of tea polyphenols from Wanyuan selenium rich black tea were investigated through a single factor experiment. Response surface methodology was used to optimize the ultrasonic ethanol assisted extraction process of tea polyphenols from Wanyuan selenium rich black tea. The results showed that the optimal extraction process for Wanyuan selenium rich tea under a fixed ultrasound power of 360 W was as follows: ethanol concentration of 41%, liquid-solid ratio of 25:1 mL/g, ultrasound temperature of 60˚C ultrasound time of 50 min, and the extraction rate of tea polyphenols could reach 16.12%. This method has high extraction efficiency and can provide a theoretical basis for the development and utilization of tea polyphenols in Wanyuan selenium rich black tea.