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supporting analysis > elemental and molecular analysis > mass spectrometry > isotopic ratio mass spectometry (IRMS)
PREFERRED TERM
isotopic ratio mass spectometry (IRMS)  
DEFINITION
  • Isotope Ratio Mass Spectrometry (IRMS) is a specialised technique used to provide information about the geographic, chemical, and biological origins of substances. The ability to determine the source of an organic substance stems from the relative isotopic abundances of the elements which comprise the material. Because the isotope ratios of elements such as carbon, hydrogen, oxygen, sulphur, and nitrogen can become locally enriched or depleted through a variety of kinetic and thermodynamic factors, measurement of the isotope ratios can be used to differentiate between samples which otherwise share identical chemical compositions.
BROADER CONCEPT
ENTRY TERMS
  • IRMS
SOURCE
  • Muccio, Z., & Jackson, G. P. (2009). Isotope ratio mass spectrometry. Analyst, 134, 213–222. https://doi.org/10.1039/B808232D
BELONGS TO GROUP
URI
https://vocabs.acdh.oeaw.ac.at/iadthesaurus/scheme/concept544
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