Gas source isotope ratio mass spectrometry
Gas source isotope ratio mass spectrometry
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气源同位素比质谱法
DOI：
10.1039/9781849735407-00500
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发表时间：
2014
影响因子：
4
通讯作者：
T. Prohaska
中科院分区：
文献类型：
--
作者：
W. Brand;C. Douthitt;F. Fourel;R. Maia;C. Rodrigues;C. Máguas;T. Prohaska
气体源同位素比质谱通常被称为同位素比质谱（IRMS）或稳定同位素比质谱（SIRMS）。IRMS是测量同位素比率的常规方法，并受益于超过65年的研究和开发。现代质谱仪都是基于气体源同位素比质谱场质量分离器。最近，高分辨率扇区现场设备的发展为IRMS增加了一个新的维度。现代仪器实现了高样品通量，这是先决条件，例如，用于通常需要分析大量样本且要求高精度的生态系统研究。IRMS专门用于测量有限数量的元素（C、H、N、O和S）转化为气态物质后的稳定同位素比。Si、Cl、Br和Se可以加入到列表中，尽管它们的应用与其他同位素系统相比是有限的。这里给出了技术背景的简要概述以及该技术在地球和地球科学、古气候研究、宇宙化学、环境科学和生命科学中的众多应用。
Gas source isotope ratio mass spectrometry is usually referred to as isotope ratio mass spectrometry (IRMS) or stable-isotope ratio mass spectrometry (SIRMS). IRMS is a conventional method for measuring isotope ratios and has benefited from more than 65 years of research and development. Modern mass spectrometers are all based on gas source isotope ratio mass spectrometry field mass separators. More recently, the development of high-resolution sector field devices has added a new dimension to IRMS. Modern instruments achieve a high sample throughput, which is a prerequisite, e.g., for ecosystem studies where usually a large number of samples needs to be analysed and high precision is required. IRMS is used specifically for the measurement of stable-isotope ratios of a limited number of elements (C, H, N, O and S) after transfer into a gaseous species. Si, Cl, Br and Se can be added to the list even though their applications are limited compared to the other isotope systems. A concise overview of the technical background is given here as well as numerous applications of this technique in earth and geosciences, paleoclimate research, cosmochemistry, environmental sciences and life sciences.