Abstract：Qi and Huai chrysanthemum samples processed in different ways were discriminated by means of Fourier transform infrared (FTIR) spectroscopy. It was shown that different processing methods may result in the variation of relative content of effective components in chrysanthemum. The variation of chemical structure may also occur. And the variations can be reflected differently on the transform infrared spectra. The dry chrysanthemum smoked with sulphur had different characters in the vibration frequency and shape of IR from other samples at 1 600 and 1 060 cm-1,and showed static characteristic absorptions at 922, 818 and 777 cm-1,which were stronger than others. The chrysanthemum processed in different ways showed differences in the Fourier transform infrared spectra. The sulphur residue in chrysanthemum can be identified by FTIR without separation and abstraction. This method is not only quick and precise but also convenient and direct. Different sorts of chrysanthemum can be identified in this way.
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