在组织和血样本中的药物化合物的量化,使用具有多个质量隔离窗口的选择性离子积累
Zhongling Liang1, Boone M Prentice1
1Department of Chemistry, University of Florida, Gainesville, Florida, USA.
Journal of mass spectrometry : JMS
|July 11, 2023
概括
这项研究引入了一种使用矩阵辅助激光脱离/电离 (MALDI) 质谱法 (MS) 具有多个质量隔离窗口的新方法,以改善药物化合物的量化. 改进的技术为血和组织样本中的药物提供了更好的检测极限和精度.
科学领域:
- 分析化学 分析化学
- 质谱测量质量谱测量
- 药品分析 药品分析
背景情况:
- 矩阵辅助激光脱/电离 (MALDI) 质谱 (MS) 提供快速分析和成像能力,用于制药量化.
- 传统的MALDI-MS由于化学噪声和缺乏色谱分离而面临动态范围和检测极限的限制.
- 内部标准对于弥补MALDI采样中的变异性至关重要.
研究的目的:
- 开发和验证一种新的MALDI-MS量化工作流程,利用多个连续的质量隔离窗口.
- 提高复杂生物矩阵中药物化合物的检测,准确性和精度的极限.
- 为了证明该方法对生物流体和组织成像质谱学的适用性.
主要方法:
- 使用了一种配备四极质量过器 (QMF) 的混合质谱仪.
- 多个狭窄的质量隔离窗口被连续应用使用QMF来分离离子.
- 工作流被测试在人体血中量化埃纳拉普利尔,同时量化埃纳拉普利尔,拉米普利尔和维拉帕米尔.
- 这种方法也被应用到用成像质谱测量来量化大鼠大脑组织中的埃纳拉普利尔.
主要成果:
- 多重质量隔离窗口方法显著降低了药物定量检测的检测极限.
- 相对标准偏差始终低于10%,精度在血中药物分析时保持在85%以上.
- 使用成像质谱法在老鼠大脑组织中定量埃纳拉普利尔,显示与LC-MS的高度一致,达到104%的准确性.
结论:
- 开发的MALDI-MS工作流与多个连续的质量隔离窗口有效地减轻化学噪声,提高量化性能.
- 该方法为复杂样本的药物分析提供了强大的和敏感的替代传统LC-MS,包括组织成像.
- 改进的准确性和精度表明了这种技术在药物开发和分析中的各种定量应用的潜力.
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