Objective:To establish UV method for the determination ofcontent of sustained-release droppingpills of oleanolic acid and its dissolution rate.Methods:In 207 nm wavelength

the content of sustained-release dropping pills of oleanolic acid and its dissolution rate were determinated by unico UV-2102PCS.Results:During the determination of the content

the calibration curves was linear in the concentration range of 20～80μg/ml

r=0.9995(n=7)

The recovery rate was 98.0%～102%

RSD<1%(n=3);during determining the dissolution rate

linearity was good within the concentration range of 10～70μg/ml

r=0.9997(n=7).The recovery rate was 98.0%～102%

RSD≤1%(n=3).Conclusion:The method is simple and rapid

and the results is accurate

reliable

and reproducible.It can be used to control the quality of sustained-release dropping pills of oleanolic acid with satisfactory results.