Quantitative Analysis Method of the Tea Saponin

Abstract

In this study, the detection method of tea saponin has been studied firstly. Determining the maximum absorption wavelength is 540 nm. Standard curve equation is y = 0.0015x − 0.0885. The correlation coefficient r = 0.9983 (p < 0.01). The relative standard deviation is 1.13%. Reclaimable rate of adding standard sample is 89.5%-97.7%. Comparing vanille-sulfuric acid of gravimetric determination, the maximum deviation is 3.27%, indicating that vanille-sulfuric acid method is worth of quantitative analysis of tea saponin.