高效液相色谱-质谱联用测定人血浆中的依那普利浓度

目的 :建立人血浆中依那普利的高效液相色谱 -质谱 (HPLC -MS)测定方法。方法 :样品血浆中加入内标阿普唑仑后 ,离心取上清液上固相萃取(SPE)小柱 ,以甲醇洗脱 ,采用HPLC -MS法 ,色谱柱为ODSC18,流动相为甲醇 -0 1%甲酸 (45∶55) ,流速为0 8ml/min。MS条件为 :ESI +源 ;毛细管电压 (Capillary) :3 81kV ;锥空电压 (Cone) :39 00V。选择离子峰检测。结果 :依那普利血浆药物浓度在2 5～400ng/ml范围内呈现良好的线性关系 ,r=0 9996 ,平均回收率为102 2 % ;日内RSD=4 0 % ,日间RSD=5 4%。结论 :该方法灵敏度高 ,无杂质干扰 ,测定结果准确 ,可用于依那普利片的人体药代动力学及相对生物利用度研究。

Determination of Enalapril in Human Plasma With HPLC- MS

OBJECTIVE:To estabilish a HPLC-MS method for determining enalapril in human plasma METHODS:Alprozalam was added into plasma sample as an internal standard,then supernate of the sample was extracted through solid-phase extration column,washed with methanol and detected by HPLC-MS method:column,ODS C18;mobile phase,methanol-0 01% formic acid(45∶55);flow rate,0 8ml/min;capillary voltage,3 81kV;cone voltage,39 0V The selected ion was determined by EST RESULTS:The calibration curve was linear within the range of 2 5～400ng/ml r=0 9 996,the recovery was 102 2%,RSDs of intra -day and inter-day were 4 0% and 5 4%,respectively CONCLUSION:The method is accurate and sensitive with no endogenous interference It can be applied to studying the pharmacokinetics and bioavailability of enalapril tablets in humans