亲水色谱-质谱联用（HILIC-MS）定量测定大鼠血浆中美金刚浓度及药代动力学研究

目的建立灵敏、可靠的亲水色谱-质谱联用（HILIC-MS）方法测定大鼠血浆中美金刚的浓度。方法血浆样品前处理采用蛋白沉淀,用HILIC-MS法测定。通过电喷雾电离源以选择离子监测（SIM）方式进行正离子检测,用于定量分析的离子分别为m/z 180（美金刚）和m/z 285（内标Ro 64-0802）。色谱分离采用Amide-80柱（100 mm×4.6 mm,5μm）,以乙腈-水-甲酸（70∶30∶0.1,v/v/v,0.35 ml/min）为流动相。结果美金刚的线性范围为2～500 ng/ml,相关系数r2为0.99882,定量下限为2 ng/ml,批内、批间精密度在3.9%和5.6%以内,准确度控制在84.9%～111.2%。结论本方法通过HILIC技术,使美金刚保留时间增加,基质抑制降低并使检测灵敏度提高。该方法成功应用于大鼠血浆测定研究中。

Quantification of memantine in rat plasma by hydrophilic interaction chromatography/tandem mass spectrometry and its application in pharmacokinetics

Objective To establish a liquid chromatography/tandem mass spectrometry employing hydrophilic interaction chromatography with mass spectrometry(HILIC-MS)method for determining memantine in rat plasma.Methods The sample preparation consisted of a protein precipitation extraction and was determined by HILIC-MS.The positive ion selecteol ion monitoring(SIM) mode was performed and the detective ions m/z 180 and 285 were used to measure memantine and Ro 64-0802(I.S.).The chromatographic separation was achieved u...