摘要
目的建立人血浆中盐酸洛哌丁胺的液相色谱-质谱联用测定法(LC-MS/MS)。方法血浆样品中盐酸洛哌丁胺与盐酸小檗碱(内标)经甲醇液.液提取后,采用ZORBAXSB—C18色谱柱(2.1mm×150mm×5μm),柱温35℃,流动相为乙腈:0.1%甲酸(60:40,V/V),流速为0.4mL/min,进样量10μL。电喷雾离子源(ESI),正离子检测,以多反应监测(MRM)方式进行定量分析,用于监测的离子为m/z477→266(盐酸洛哌丁胺)和m/z366→292(内标)。结果盐酸洛哌丁胺的检测下限为0.2ng/mL(S/N=3),在浓度0.5~500ng/mL范围内线性良好(r=0.9982),低、中、高浓度(1ng/mL、20ng/mL、400ng/mL)的平均回收率分别为84.6%,88.5%和90.2%,日内与日问RSD分别小于6%与7%。结论LC—MS/MS法可用于盐酸洛哌丁胺的定性定量分析。
Objective A LC-MS/MS method for analysis of loperamide hydrochloride in human plasma was developed. Methods Loperamide hydrochloride and berberine hydrochloride (internal standard) were separated from human plasma samples by liquid-liquid extraction with methanol. Chromatographic separation was performed on a ZORBAX SB-C18 (2. 1mm ×150mm× 5μm) column at 35℃. Acetonitrile/0. 1% formic acid (60:40 by volume) was used as mobile phase at a flow rate of 0.4mL/min, and the injection volume was 10μL. Electrospray ionization(ESI) source was applied and operated in positive ion mode. Quantification was performed using multiple reaction monitoring(MRM) of the transitions m/z 477→266 and m/z 366→292 for loperamide hydrochloride and the internal standard, respectively. Results The limit of detection of loperamide hydrochloride was 0.2ng/mL ( S/N = 3 ), and the calibration curve in the concentration range of 0.5 - 500ng/mL showed a good linear (r = 0. 9982). The average recoveries of low, medium and high concentrations(lng/mL, 20ng/mL, 400ng/mL) were 84.6%, 88.5% and 90.2%, respectively. The precisions (RSD) of winth-day and between-day were less than 6% and 7%, respectively. Conclusion This LC-MS/MS method can be used for qualitative and quantitative analysis of loperamide hydroehloride.
出处
《中国法医学杂志》
CSCD
北大核心
2009年第1期42-44,共3页
Chinese Journal of Forensic Medicine