摘要
[目的]建立液相色谱-质谱联用(LC-MS/MS)的方法测定犬灌胃给药升麻葛根汤颗粒后葛根素、芍药苷、异阿魏酸的药代动力学。[方法]采用Waters ACQUITY UPLCBEH C18柱(2.1 mm×50 mm,1.7μm),流动相:0.05%甲酸水(A)-乙腈(B)梯度洗脱;流速:0.2 mL/min;柱温:25℃;进样量:5μL。以甲苯磺丁脲为内标,采用电喷雾离子源(ESI离子源),在负离子检测方式下进行多反应离子检测(MRM),检测离子对分别为m/z 415.2→294.9(葛根素)、m/z 525.0→449.0(芍药苷)、m/z 193.05→133.9(异阿魏酸)、m/z 269.09→169.9(甲苯磺丁脲,内标)。[结果]葛根素、芍药苷、异阿魏酸在10~4 000 ng/mL范围内线性关系良好。血浆中内源性物质不干扰测定,方法回收率、基质效应、精密度、准确度和稳定性均符合生物样品的测定要求。[结论]该方法准确度强,专属性好,灵敏度高,可用于检测葛根素、芍药苷、异阿魏酸的药代动力学。
[Objective] LC-MS/MS was developed for the determination of the pharmacokinetics of puerarin,paeoniflorin and isoferulic acid in dogs after oral Shengma Gegen decoction granule. [Methods] The column ofWaters ACQUITY UPLCBEH C18(1.7 μm,2.1 mm×50 mm)and a mixture of 0.05% formic acid water solution(A)-acetonitrile(B) as the mobile phase at the flow-rate of 0.2 mL/min,the column temperature was 25 ℃ and the injection volume was 5 μL.Tolbutamide was used as the internal standard,detection was by negative ion electrospray ionization(ESI) mass spectrometry with multiple-reaction monitoring(MRM). Detection of ion pairs respectively are m/z 415.2 →294.9 for puerarin,m/z 525.0 →449.0 for paeoniflorin,m/z 193.05 →133.9 for isoferulic acid,m/z269.09 →169.9 for tolbutamide. [Results] For the puerarin,paeoniflorin and isoferulic acid,the linear calibration curves were obtained over the concentration range 10 ~4 000 ng/mL.Endogenous substances in the plasma do not interfere with the determination,the recovery rate,matrix effect,precision,accuracy and stability of the method are in accordance with the requirements of biological samples. [Conclusion] The method has the advantages of strong accuracy,good specificity and high sensitivity,and can be used to detect the pharmacokinetics of puerarin,paeoniflorin and isoferulic acid.
引文
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