探测液体染色学-并联质谱反应动力学和响应水平定义校准策略的非线性效应,使用简单的方法来扩大线性动态范围
1Department of Special Chemistry, PathWest Laboratory Medicine, Sir Charles Gardiner Hospital, Nedlands, Western Australia 6009, Australia.
液体染色学-双重质谱学 (LC-MS/MS) 显示非线性检测,影响了定量分析校准. 了解反应概况和非线性效应对于选择适当的校准方法至关重要,比如二次回归.
科学领域:
- 分析化学 分析化学
- 质谱测量质量谱测量
- 染色体学 染色体学 是一种染色学.
背景情况:
- 液体染色学-双重质谱法 (LC-MS/MS) 广泛用于定量分析.
- 由于信号和和不成比例的峰值增长,LC-MS/MS系统表现出固有的非线性检测行为,特别是在更高的度下.
- 这种非线性影响了检测灵敏度的单位响应 (UR) 和近线性响应范围 (NLRR).
研究的目的:
- 检查LC-MS/MS的响应概况和动态.
- 阐明影响校准方法选择的主要非线性效应.
- 为优化LC-MS/MS定量分析的校准策略提供见解.
主要方法:
- 仪器响应映射用于分析LC-MS/MS信号行为.
- 评估非线性效应,如离子抑制,信号交叉贡献和矩阵效应.
- 线性和二次回归模型的校准比较.
主要成果:
- 由于信号和和离子抑制等因素,LC-MS/MS响应是非线性的,减少了单元响应.
- 接近线性反应范围 (NLRR) 变化,并可能受到分析物,平台和灵敏度的影响.
- 二次回归为非线性响应动态提供了更大的适应性,而线性回归需要严格的条件.
结论:
- 了解LC-MS/MS非线性对于准确的定量分析至关重要.
- 由于其非线性性质,二次回归通常比线性回归更适合LC-MS/MS校准.
- 像调整SRM转换或检测增益等策略可以在必要时扩展NLRR进行线性校准.
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