实时分析样本注射 (SIRTA) 使用GC-MS与冷EI
Oneg Elkabets1, Benny Neumark1, Aviv Amirav1,2
1School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel.
Journal of the American Society for Mass Spectrometry
|January 18, 2024
概括
一种新的实时分析样本注射 (SIRTA) 方法使用气色谱-质谱与冷电子电离 (GC-MS与冷EI) 进行快速分析. 这种具有成本效益的技术可以实现实时分析,而不需要GC分离,在不到一分钟的时间内分析样本.
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:
- 实时分析 (RTA) 需要先进的方法,超出目前的环境脱吸电离技术.
- 液体样本注射为RTA提供了一个替代方案,而不需要修改现有的LC-MS仪器.
研究的目的:
- 介绍一种名为实时分析样本注入 (SIRTA) 的新型RTA方法.
- 使用冷电子电离的气体染色学-质谱学 (GC-MS与冷电子电离) 实现经济高效的RTA.
主要方法:
- 取代了标准GC柱,有一个短毛细血管 (1米长,0.1毫米ID) 将GC注入器连接到冷EIMS传输线.
- 在甲醇或其他溶剂中溶解样本 (∼1毫升),并通过自动采样器使用标准注射器注射,绕过GC分离.
- 采用冷EI的开放离子源来管理溶剂化和增强分子离子.
主要成果:
- 每个样品的快速分析时间为0.2-0.7分钟,可进行连续分析.
- 对12种化合物和7种混合物进行了SIRTA冷EI分析,包括药物,大麻,石油和高达800g/mol的合成有机物.
- 确认零附加成本,不需要额外的仪器仪表.
结论:
- 使用冷EI的SIRTA是一种可行的,具有成本效益的实时分析多样样样本的方法.
- 该技术提供了快速,连续的分析,并增强了分子离子检测.
- 适用于广泛的有机化合物和复杂混合物.
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