化学
色谱法
蛋白质沉淀
电喷雾电离
选择性反应监测
醋酸铵
分析物
质谱法
药代动力学
美罗培南
串联质谱法
电喷雾
高效液相色谱法
抗生素
药理学
抗生素耐药性
医学
生物化学
作者
Jiping Huo,Yangyang Guo,Bo Zhang,Zhigang Zhao,Guangzhi Shi,Shenghui Mei
摘要
Abstract We developed an ultra‐high‐performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS) method to determine four antibacterial drugs in human plasma for clinical usage. Samples were prepared using protein precipitation with methanol. Chromatographic separation was accomplished in 4.5 min on a BEH C18 column (2.1 × 50 mm, 1.7 μm) using a gradient elution of methanol and water (containing 7.71 g/L concentrated ammonium acetate, adjusted to pH 6.5 with acetic acid) at a flow rate of 0.4 mL/min. Positive electrospray was used for ionization. The method was linear in the concentration range 1–100 μg/mL for vancomycin, norvoncomycin, and meropenem; and 0.5–50 μg/mL for R‐isomer of moxalactam and S‐isomer of moxalactam. For all analytes, the intra‐ and inter‐day accuracies and precisions were −8.47%–10.13% and less than 12%, respectively. The internal standard normalized recoveries and matrix effect were 62.72%–105.78% and 96.67%–114.20%, respectively. All analytes were stable at six storage conditions, with variations of less than 15.0%. The method was applied in three patients with central nervous system infection. The validated method might be useful for routine therapeutic drug monitoring and pharmacokinetic study.
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