HPLC-MS法测定人体血浆中的奥美沙坦

目的 建立测定人体内血浆中奥美沙坦浓度的HPLC-MS方法.方法 采用三氟乙酸沉淀法处理血浆,HyPurity C18柱(150 mm 2.1 mm,5μm),柱温40℃,流动相为水-甲醇-乙腈(14:60:26),流速为0.22 mL·min-1,质谱条件采用正离子检测的电喷雾电离方式,喷雾电压4.5 kV,正离子模式,用于定量分析的离子(m/z)分别为447(奥美沙坦),376(内标,加替沙星).结果 奥美沙坦检测下限为25 μg·L-1,线性范围25～3200 μg·L-1(r=0.9998),日内和日间RSD均低于15%.结论 该方法灵敏度高、快速、简便、无杂质干扰,适合于奥美沙坦的药代动力学及生物等效性研究.

High-performance liquid chromatography-mass spectrometry for determining olmesartan in human plasma

OBJECTIVE: To establish a simple and rapid HPLC-MS method for determining the contents of olmesartan in human plasma. METHODS: Plasma were precipitated with trifluoroacetic acid, then analyzed on an HyPurity C(18) column (150 mm 2.1 mm, 5 microm). Samples at 40 degrees celsius;. The mobile phase consisted of water-methanol- acetonitrile(14:60:26) with a flow rate of 0.22 ml/min. RESULTS: The lower limit of qualification was 25 microg/L. The calibration curve was linear over the range of 25-3200 microg/L (r=0.9998), with the intra-day and inter-day RSD less than 15%. CONCLUSION: The method is sensitive, rapid and suitable for the study of pharmacokinetics and bioavailability of olmesartan.