Determination of tea polyphenols in milk tea based on spectrophotometer
In this study, the characteristics of colorimetric change in turbid solution can be determined by spectrophotometer. The content of tea polyphenols in milk tea without protein precipitation is determined by using ferrous tartrate solution as the chromogenic agent at a certain temperature. The influence of dilution ratio of milk tea, the amount of chromogenic agent, the chromogenic time and the chromogenic temperature on the determination result is explored, and the analytical method for determining the content of tea polyphenols in milk tea and other tea drinks by spectrophotometer is established. The results showed that the best test results were obtained […]