A new method was discussed to determinate flavonoids form Ginkgo biloba in medicinal tablet by sodium molybdate spectrophotometry at the wavelength of 266 nm. It bases on which flavonoids of Ginkgo biloba could react with sodium molybdate to form yellow molybdate. The relation between the flavonoids content and absorptivity was obtained.It is A=0.017 1C+0.001 4 where C is the flavonoids content,its region is 4.0~50.0 μg/mL,A is absorptivity.The linear correlation coefficient of the equation,r=0.999 8 and ...