TLC-SERS study on evodiamine in evodia rutaecarpa

A new method for analyzing the ingredients of evodiamine(EV), rutaecarpine(RU), hydroxy evodiamine (HYD), evo-diamide(ED), dihydrorutaecarpine(DRU) and 14-formyldihydrorutaecarpine(FDRU)in evodia rutaecarpa using high performance thin layer chromatography (TLC) and surface enhanced Raman spectroscopy (SERS) technique is reported. The character of this method is that standard samples are not needed . The results show that the characteristic spectral bands of EV, RU, HYD, and ED can be obtained from the TLC spot with microgramme of sample. The spectral band at 1562 cm^-1 was obtained with great enhancement molecule absorbed in surface silver sol by tt electrons in ring. The spectral bands of EV, RU, HYD and ED are obviously different due to their differences in structure. The TLC and SERS techniques standard samples are a convenient and speedy method to analyze chemical ingredients with high sensitivity for the study of the Chinese traditional medicine.