ABSTRACT
OBJECTIVE:To establish a RP-HPLC method for simultaneous determination of caffine,acetaminophen and isopropylphenazone in human plasma after oral dose of saridon.METHODS:Hypersil Hypurity TM Advance was used as chromatographic column and the mobile phase was a mixture of0.01mol/L phosphoric acid-methanol-tetrahydrofuran(86∶12∶2).The detection wavelength was273nm.RESULTS:The calibration curves were linear in the ranges of0.39～100.0?g/ml for caffine,1.96～500.0?g/ml for acetaminophen,and1.17～300.0?g/ml for isopropylphenazone,respectively.The accuracy of all was higher than95.0%.The inter-day and intra-day RSD was less than10.0%.CONCLUSION:The present method is sensitive,accurate,convenient,and highly specific,which can meet the requirement in plasma determination of three components in Saridon tablet.