Content Determination of Total Flavonoids from Radix Astragali of Different Growth Years
Objective: To determine the contents of total flavonoids from HuangQi (Radix Astragali) of different growth years. Method: HuangQi growing for 6 to 36 months were detected with spectrophotometry, the maximum absorption wavelength was 510nm. Result: The contents of total flavonoids from HuangQi cultivated for 36 months was the highest, which cultivated for 24 months was slightly lower, close to the ones for 36 months. Conclusion: The best harvest time for HuangQi is two years at least judging from the content of total flavonoids.
NETL
NSTL
万方数据
维普
