Contnet Determination of 5-hydroxymethyl Furfural in Rhizoma Rehamanniae Praeparatae by TLC-Scanning Method / 中成药

The stable brownish red phenylhydrazone compound formed by the combination of 5-hy- droxymethyl furfural with 2,4-dinitrophenylhydrazine showed the maximum absorption at 493nm wavelength of chromatic spectrum.So 5-hydroxymethyl furfural content can be deter- mined with dual wavelength TLC-scanning method.This method is simple,quick and accu- rate.