RP-HPLC同时测定人血浆丙泊酚和利多卡因

 目的建立反相高效液相色谱同时测定人血浆丙泊酚(异丙酚)和利多卡因的方法。方法以麝香草酚和布比卡因分别为异丙酚和利多卡因的内标，样品用环己烷提取。氮气吹干有机层，残留物用流动相重新溶解后，用Hypersil BDS C₁₈柱分析，流动相为乙腈-甲醇-水(10∶60∶30)，内含正丁胺0.14%和冰醋酸0.1%，流速为1 mL·min^-1，检测波长：1～7 min用220 nm，7～16 min用273 nm。结果异丙酚和利多卡因的血药浓度与峰面积比在0.1～25.6μg·mL^-1的范围内呈线性关系（r=0.998，r=0.9995），检测限分别为0.1和0.05μg·mL^-1，日内和日间偏差小于5%(n=5), 其相应的平均回收率分别为：93.33%，99.4%和90%，95.67%。结论此方法简便，结果准确，适合用于异丙酚和利多卡因的临床药动学和药效动力学研究。

Determination of propofol and lidocaine in human plasma by RP-HPLC

OBJECTIVE　To establish an assay for the simultaneous determination of propofol and lidocaine in human plasma using reversed-phase high performance liquid chromatography（RP-HPLC）.METHODS　With thymol and bupivacaine as the internal standards for propofol and lidocaine respectively,the extraction was performed with cyclohexane.The organic layer was evaporated and the residue was redissolved by mobile phase.The concentrations of propofol and lidocaine were assayed on a hypersil BDS C18 column with a mobile phase consisting of acetonitrile-methanol-water（10∶60∶30）（including 0.14% n-butyamine 0.1% acetic acid）at a flow rate of 1 mL*min-1 and detected at 220 nm during 1～7 min and at 273 nm during 7～16 min.RESULTS　The linearity between concentrations and peak area ratio was obtained from 0.1 μg*mL-1 to 25.6 μg*mL-1（r=0.998，r=0.9995）.The detection limits were 0.1 μg*mL-1 for propofol and 0.05 μg*mL-1 for lidocaine.The within-day and between-day variation coefficients were less than 5%(n=5).The average recoveries were 93.33%,99.4% and 90%,95.67% respectively.CONCLUSION　The method was found to be rapid,accurate and precise.It is suitable for clinical pharmacokinetic and pharmacodynamic study.