茶多酚双液相氧化制取茶色素参数研究  

Study on preparing parameters of tea pigments from tea polyphenols oxidized in two-liquid-phase system

作　　者：李立祥[1] 萧伟祥[1] 

机构地区：[1]安徽农业大学农业部茶叶生物技术重点开放实验室,安徽合肥230036

出　　处：《信阳农业高等专科学校学报》2003年第1期43-46,共4页Journal of Xinyang Agricultural College

摘　　要：对茶多酚双液相酸性氧化制取茶色素的参数进行了研究,结果表明:除了搅拌速度和供氧外,茶多酚浓度、温度、氧化剂浓度、酯比例、反应时间和pH值均对茶色素中茶黄素(TFs)和茶红素(TRs)的形成有较大影响。相对低的茶多酚浓度、低的温度、低的氧化剂浓度、低的酯比例、短的反应时间和低的pH值有利于TFs的形成。在茶多酚浓度、温度、氧化剂浓度、酯比例、反应时间高值和pH低值时可取得较高的茶色素得率。Preparing parameters of tea pigments from tea polyphenols oxidized in two-liquid-phase system were studied. The result showed that there was the more effects of concentration of tea polyphenols, temperature, concentration of oxidant, ester proportion, pH value and reaction time on forming theaflavins(TFs) and thearubigins(TRs) in tea pigments, except for stirring speed and supply oxygen. Lower concentration of tea polyphenols and concentration of oxidant, lower temperature, lower proportion of ester, shorter reaction time and lower pH value was of great advantage to formation of TFs was opposite. Under condition of higher concentration of tea polyphenols, and concentration of oxidant, higher temperature and ester proportion and lower pH value, there could be the higher yield of tea pigments.

关 键 词：茶色素 茶多酚 双液相系统 酸性氧化 体外氧化 制取 工艺参数 茶多酚浓度 温度 氧化剂浓度 PH值 

分 类 号：TQ464[化学工程—制药化工]