用三种喷雾器设计对入口温度进行评估,用于脱落,喷射电气,电离,质谱,组织分析
Rory T Steven1, Amy Burton1, Adam J Taylor1
1National Physical Laboratory Teddington TW11 0LW, U.K.
Journal of the American Society for Mass Spectrometry
|January 5, 2024
概括
这项研究比较了三种在临床前研究中用于质谱成像 (MSI) 的脱电喷雾电离 (DESI) 喷雾器设计. 一种新的商用喷雾器原型在各种温度下表现出最佳性能,用于检测组织样本中的分子.
科学领域:
- 分析化学 分析化学
- 生物医学成像技术 生物医学成像技术
- 质谱测量质量谱测量
背景情况:
- 质谱成像 (MSI) 能够在生物组织中进行空间分辨的分子检测.
- 脱电喷雾电离 (DESI) 是一个关键的MSI技术,离子源技术正在不断进步.
- 新的DESI喷雾器设计和加热的输入毛细血管正在改善临床前研究能力.
研究的目的:
- 为了评估和比较三个DESI喷雾器设计的性能.
- 为了研究加热的输入毛细血管温度对分子信号强度的影响.
- 评估先进数据分析技术对优化MSI实验的有用性.
主要方法:
- 对三种DESI喷雾器代的比较分析 (水商用,DEFFI型,水商用原型).
- 使用MSI用加热的输入毛细血管 (高达500°C) 对小鼠丸进行组织成像.
- 对离子强度与温度的单变量分析和质谱的多变量分析 (UMAP,k-means集群).
主要成果:
- 所有喷雾器在不同温度下都表现出类似的离子强度趋势,原型喷雾器的性能往往与性能相匹配或超过.
- 观察到的强度趋势因分子和温度而异 (增加,减少,钟形).
- UMAP 和 k-means 聚类为参数空间优化提供了互补的见解.
结论:
- 最新的商用DESI喷雾器原型显示了MSI应用的有希望的性能.
- 温度优化至关重要,可以使用单变量和多变量数据分析来探索.
- 该研究为优化DESI-MSI实验对特定分析物的研究人员提供了有价值的数据.
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