[Analysis and comparison of daxueteng and their extracts by FTIR].

The present study is to compare and analyze Sargentodora cuneata (oliv) Rehd. etwils herbs, the aqueous, anthraquinone extracts and residue in Jiang Xi and An Hui quickly and undamagedly by Fourier transform infrared spectroscopy(FTIR) and two-dimensional correlation spectroscopy. In the spectra of DaXueTeng, there are two strong peak areas at about 1400-1620 cm(-1) and 1000-1200 cm(-1), and it was concluded that DaXueTeng contains much glycoside and anthraquinone. Anthraquinone extracts only exhibit strong peaks of 1400-1620 cm(-1) which were stronger than that of 1000-1200 cm(-1), and this illustrated that this method was adapted to extracting anthraquinone; then aqueous only show powerful peaks of 1000-1200 cm(-1), so the authors know that the craftwork was suitable for extracting glycoside; finally, the authors also found that the residue of DaXueTeng contained much calcium oxalate. All of these illustrated that FTIR could not only analyze and identify traditional Chinese medicine (TCM) and extract components, but also discriminate contents of different extracts of TCM. The authors developed the new method to analyze and evaluate the DaXueTeng and their pharmacodynamic extracts successfully.