[Determination of the mixed soporific by infrared subtractive spectroscopy technique].

A software of subtractive spectroscopy is provided on the NICOLET FTIR-560 infrared spectrometer. Some complicated processes of separation can be avoided by using the subtractive spectroscopy technique which simplifies the analytical procedure. An excellent infrared spectrum of a single component in a complex mixture is obtained successfully in this paper. By analysing and searching spectrum, the structures of the main components of the mixed soporific have been identified and it also improved the accuracy of appraising.