[Infrared spectrum analysis of admixture decoction of herba Ephedrae with Ramulus cinnarnomi].

The infrared spectra of decoction of herba ephedra and ramulus cinnarnomi and the mixed decoction of herba ephedra + ramulus cinnarnomi were tested. The change in the mixed decoction was discussed to study the relationship between herba ephedra and ramulus cinnarnomi after decoction. The results showed that some components of herba ephedra and ramulus cinnarnomi were retained in the mixed decoction of herba ephedra + ramulus cinnarnomi, such as 1 205 and 1 074 cm(-1), but some components that never appeared in the two component spectra increased, such as 1 394 and 678 cm(-1). New absorption peaks were generated in the mixed decoction of herba ephedra + ramulus cinnarnomi, such as 757 and 407 cm(-1). It can be showed that there are differences in the chemistry environment of the various chemical groups in the three decoctions introduced above, and with the variation in absorption peak position, possibly some new chemical compositions were created. Medical ingredients in the decoction are not simply the addition of herba ephedra and ramulus cinnarnomi based on the studies of infrared spectrum of the mixed decoction of herba ephedra + ramulus cinnarnomi, and the new notion of prescription spectroscopy was proposed.