高效液相色谱法同时测定苯巴比妥、苯妥英、卡马西平的血药浓度

Simultaneous Determination of Phenobarbital, Phenytoin and Carbamazepine in Serum by RP - HPLC

目的:建立以高效液相色谱法同时测定苯巴比妥、苯妥英、卡马西平血药浓度的方法。方法:取患者血清,经二氯甲烷提取后在C18柱上分析,流动相为甲醇-水(57:43),柱温为30℃,检测波长为254nm,流速为0.8ml/min。结果:苯巴比妥、苯妥英、卡马西平分别在2.5-40、2.5-40、1.25-20μg/ml范围内线性关系良好,日内和日间RSD<10％(n=5)。结论:本方法简便、稳定,用于苯巴比妥、苯妥英、卡马西平的血药浓度监测效果良好。

OBJECTIVE: To establish a RP - HPLC method for simultaneous determination of the concentrations of phe-nobarbital, phenytoin and carbamazepine in serum.METHODS: Phenobarbital, phenytoin and carbamazepine were extracted from serum with CH2Cl2 and analysed using C18 column with mobile phase consisting of methanol - water(57 : 43); the column temperature was 30℃ ; the detecting wavelength was 254nm and the flow rate was 0.8ml/ min.RESULTS: The calibrating curves of phanobarbital, phenytoin and carbamazepine were linear in the ranges of 2.5 - 40, 2.5-40 and 1.25-20μg/ ml respectively .The within- day and between- day RSDs were less than 10% (n = 5) .CONCLUSION : This method is simple and reliable and suitable for phenobarbital,phanytoin and carbamazepine monitoring.