保健茶—紫金竹壳茶总黄酮及茶汤中黄酮测定

Health Tea-Zijin BambooTea Shell of theTotal Flavonoids and Determination of Flavonoids in Tea

紫金竹壳茶在30ml 40%乙醇、超声波处理25min、60℃恒温1h的条件下用洛合—紫外分光光度法测得黄酮类化合物含量为46.4mg/g。用开水直接冲泡竹壳茶,实验表明开水用量对竹壳茶中黄酮的泡出量不呈线形关系。同一份竹壳茶开水冲泡数次,测定每次茶汤中的黄酮含量,实验结果显示:第一泡茶黄酮含量最高,达35.8 mg/g,第二泡茶汤黄酮含量为1.79 mg/g。实验平均回收率为100.3%。

Zijin shell bamboo tea in 30ml 40% ethanol, deal with ultrasonic 25min ,60℃ constant temperature 1h conditions cornbined with Rod - UV measured for the content of flavonoids 46.4mg / g.With direct water brewing tea bamboo shell, the experimerits show that the amount of water on the shell of bamboo tea flavonoids in the bubble was not a linear relationship between the volume. With a bamboo shell lea brewing water several times, each time the determination of flavonoids in tea, the results show that：tile first tea flavonoids in the highest, amounting to 35.8 mg/ g,the second for the flavonoids in tea soup 1.79 mg / g. The average recovery rate for Ihe experimental 100.3 percent.