?Total flavonoids in ginkgo bilobal leaves were determined by caulometry.The coulometric titration conditions were studied.After solvent extration of the ginkgo bilobal leaves,flavonoids were seperated by column chramatograph.The coulometric titration was carried out in a mixture of 2?mol/L HCl1?mol/L KBrEtOH(3∶3∶2).The end point was detected by the deadstop method.The result showed that the total flavonoids was 2.27%.The advantages of this method are simple,rapid,accurate and can be used to analyze sma...