ABSTRACT
OBJECTIVE:To develop HPLC method for quantitative determination of ti anepine sodium in blood plasma METHODS:Tianepine was extracted with ethyl acet ate The residues were analyzed with a reverse phase HPLC system(DiamonsilTM C18 column,4 6mm?250mm,5?m);Mobile phase,MeOH-C2H3OONH4(80∶20);UV detecti on 220nm RESUL_TS:The average recoveries for tianepine sodium in high,medium and low concentr ations were 97 63%,97 60% and 93 67%,respectively The within-day and b etween-day relative standard deviations were less than 5%(n=5) The calibratio n curves had good linearity within a concentration range of 1 0～83 3?g/ml T he regression equation was Y=6 05?10-2X+8 18?10-1,r=0 9 994(n=12) The limit of quantitation for tianepine sodium was 0 2?g/ml CONCLUSION:The metho d provides a se_nsitive,accurate,precise and reliable analytical procedure for clinical monito ring of tianepine sodium blood in plasma and its pharmacokinetic studies