反相高效液相色谱-荧光法测定血浆中丙泊酚的浓度

目的 :建立反相高效液相色谱 -荧光检测法测定血浆中丙泊酚浓度的方法。方法 :采用ZorbaxEclipseXDB -C18 色谱柱(150mm×4 6mm ,5μm) ,甲醇 -乙腈 -0 005mol/L醋酸钠缓冲液 (pH4 0)=55∶20∶25(V/V)为流动相 ,样品提取分离后用流动相溶解 ,在Ex/Em=276/310nm波长处检测。结果:本法测定的标准曲线在0 015625～8μg/ml浓度范围内线性关系良好(r=0 9998) ,灵敏度为1ng/ml(S/N=3) ,最低检测浓度为10ng/ml,绝对回收率在89 33 %～93 37 %之间 ,方法回收率在97 75 %～103 31 %之间 ,日内、日间变异系数分别为1 38 %～5 02 %、4 45 %～9 056 %。结论 :用本方法检测丙泊酚的血药浓度方便、稳定、灵敏度高 ,可满足临床药动学研究要求

Determination of the Concentration of Propofol in Plasma by RP- HPLC with Fluorescence Detection

OBJECTIVE:To build up a method for the determination of propofol in plasma by RP-HPLC with fluoresˉcence detection.METHODS:The separation was performed on a reversed-phase Zorbax Eclipse XDB-C 18 column(150mm×4.6mm,5μm)with a mobile phase consisting of methanol-acetonitrile-0.005mol/L sodium acetate buffer(pH4.0)(55∶20∶25,V/V).Propofol was extracted from plasma and dissolved in the mobile phase then detected at276/310nm.RESULTS:The calibration curve had the fine linearity in the concentration range of0.015625～8μg/ml(r=0.9998).The limit of detection(LOD)was1ng/ml(S/N ratio=3),the limit of quantification(LOQ)was10ng/ml.The absolute recovery was89.33%～93.37%,the relative recovery was97.75%～103.31%.The within-day and between-day precision(RSD%)was1.38%～5.02%and4.45%～9.056%respectively.CONCLUSION:The method is simple,stable and highly sensitive and can meet with the research of clinical pharmacokinetics.