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《Acta Pharmaceutica Sinica》 1989-10
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LX Xu, AR Liu and XQ Zhang (Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050)  
A method for the determination of total flavonoids in sophora japonica L. by coulometric titration was developed. The titration was carried out in a mixture of 1 mol/L KBr--2 mol/L HCl (1:1) and bromine was generated at the anode,rutin reacted with two moles of bromine with an n value of 4.The advantages of this method are simple and rapid, it can be used to analyze small amount of sample.
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1 LX Xu, AR Liu and XQ Zhang (Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050);COULOMETRIC TITRATION OF TOTAL FLAVONOIDS IN SOPHORA JAPONICA L.[J];药学学报;1989-10
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