高效液相色谱法测定人血浆中双氯芬酸钠的浓度

Determination of Diclofenac Sodium in Huamn Plasma by HPLC

目的 :建立人血浆中双氯芬酸钠浓度的高效液相色谱测定方法。方法 :血样加乙腈去蛋白沉淀后 ,在Hypersil -BDS(250mm×4 6mm ,5μm)色谱柱上 ,以甲醇 -水 -10 %磷酸 (60∶40∶1)为流动相进行色谱分离 ,检测波长为276nm ,柱温为35℃。结果 :双氯芬酸钠浓度在20 50～2050 0ng/ml范围线性关系良好 (n=5,r=0 9998) ,最低检测浓度约为10ng/ml。低、中、高3种浓度的相对回收率为99 47 %～105 4 % ;日内相对标准差为3 77%～5 81 % (n=5) ,日间相对标准差为4 93 %～8 96% (n=5)。结论 :本法简便、快速 。

OBJECTIVE:To establish a HPLC procedure to determine diclofenac sodium in human plasma.METHODS:The plasma sample was deproteinized by adding acetonitrile,A Hypersil-BDS(250×4.6mm,5μm)column with a mobile phase consisting of methanol-water-10%phosphate acid(60∶40∶1)was used,the detecting wavelength was276nm,column temˉperature was35℃.RESULTS:The linear range was20.50～2050.0ng/ml(r=0.9998,n=5),the detective limit was10ng/ml.The recovery was99.47%～105.4%with the within-day RSD from3.77%to5.81%(n=5),and the between-day RSD from4.93to8.96%(n=5)at three different concentrations.CONCLUSION:The method is simple,rapid and suitable for the pharmacokinetic study of diclofenac sodium.