Spectroscopic insight into the characteristic of the minor bupleurum decoction

Minor bupleurum decoction is a famous prescription of traditional chinese medicine and has been used to treat the fever and noncausal periodic fever due to its wide clinical application. The characteristics of the minor bupleurum decoction were studied by spectroscopic methods in this paper. Result shows that minor bupleurum decoction could emit fluorescence after absorbing the exciting light. The fluorescence peak wavelength is about 440 nm and has a little red shift with the increasing excitation wavelength. The maximum absorption wavelength is about 273 nm, and there is a good linear relationship between the fluorescence intensity and minor bupleurum decoction concentration. On the other hand, the mechanism of absorption and fluorescence spectroscopy of minor bupleurum decoction is also discussed.