期刊论文

Determination of Tea Polyphonels in Dark Tea by Using Chemical Oscillation Method

中文

湖南城市学院学报(自然科学版)

1672-7304

2017

26

5

74-78

10.3969/j.issn.1672-7304.2017.05.0016

黑茶金花湖南省重点实验室开放基金项目（2016TP1022）； 湖南省大学生研究性学习和创新性实验计划项目（湘教通[2016]283号）；

本校为第一机构

本实验建立葡萄糖-丙酮-硫酸锰-溴酸钾-硫酸的B-Z振荡反应体系,考察没食子酸丙酯及黑茶茶多酚提取液对振荡体系的扰动﹒实验结果显示：没食子酸丙酯的浓度在一定范围内与振荡体系振幅的改变量（ΔE）呈现线性关系,其线性方程为ΔE=57.242 59×lnc＋295.626 59,线性范围0.025 g/L~0.225 g/L,检出限为6.25×10-3 g/L;另外利用该振荡体系对黑茶提取液中的茶多酚进行测定,其结果与紫外-可见分光光度度法测定结果相近;同时分析了茶多酚对葡萄糖振荡体系扰动的振荡机理﹒利用此体系测定黑茶茶多酚含量,成本低、耗时短、操作简单。

The B-Z oscillating system of glucose-BrO3-Mn2＋-H2SO4-Acetone was established in experiment. The disturbance of propyl gallate and dark tea polyphenol extract on the oscillating system were investigated. The results indicated that a well linear relationship existed between the concentration of propyl gallate and the change of oscillating amplitude（AE）, the regression equation is as follows： AE=57.242 59×lnc＋295.626 59 and the range was 0.025 g/L-0.225 g/L, which with a detection limit of 6.25× 10-3 g/L, in addition, we make a measurement...