ABSTRACT
Objective To determine the quercetin content in Folium A pocyni Veneti from different commercial markets and harvest time by HPLC .Methods The determination was performed on an Aglient Eclipse XDB-C18 column (250 mm × 4 .6 mm ,5 μm)at 30 ℃ with a mobile phase composed of Methanol :0 .1% phosphoric acid run at gradient elution ;the detec-tion wavelength was 360 nm .Results It is a better timing to harvest when the flower is turning fruit and the leaf color is turn-ing from green to yellow .Our results have demonstrated that at that time ,the content of quercetin in Folium A pocyni Veneti was relatively higher .In addition ,this report also shows that the concentration of quercetin in most medicinal materials from domestic market complies with the requirement of the Pharmacopoeia ,but there were still a small percent of samples that didn′t meet the Pharmacopoeia standards .Conclusion We suggested that the quality supervision and inspection on Folium A pocyni Veneti needs to be strengthened .