Ultrasonic extraction method was used to extract the total flavonoids in the medicinal tea,TLC was used to identify Sophora japonica in the medicinal tea,and UV spectrophotometry was used to determine the total flavonoids in the medicinal tea.The moisture,total ash,lead and cadmium in Liyan medicinal tea were determined.There were identical and clear spots in the same position between Sophia japonica and Liyan herbal tea in TLC.Total flavonoids content was 1.27％.Water content was 7.06％.The total ash content was 5.80％.Acid insoluble ash content was 2.00％.The contents of Pb and Cd were 1.26 and 2.01× 10-2 mg/kg respectively.The quality standard of Liyan herbal tea can be used for the quality control of the herbal tea.
NETL
NSTL
万方数据
