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Updated: Sep 17, 2025

Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter
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用ESI-Orbitrap-MS中的SO3片段对甲硫酸盐进行三重氧同位素分析

Yihang Hong1,2, Longchen Zhu1,2, Daniel R Crocker3

  • 1International Center for Isotope Effects Research (ICIER), State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, Nanjing University, Nanjing 210023, China.

Analytical chemistry
|June 29, 2025
PubMed
概括

一种新方法使用Orbitrap质谱测量甲硫酸盐 (MSA) 中的氧同位素,这对于跟踪大气硫循环至关重要. 这种技术需要更小的样本,并且比传统方法具有更高的灵敏度.

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Mass Spectrum01:23

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An unknown compound can be established by identifying the molecular ion peak in the mass spectrum. The molecular ion peak is often weak or absent due to the predominance of fragmentation in high-energy electron beams. In such cases, a low-energy electron beam can be used to scan the spectrum to enhance the intensity of the molecular ion peak. Additionally, chemical ionization, field ionization, and desorption ionization spectra are used to obtain a relatively intense molecular ion peak.
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