Guidelines for Isotope and Gas Ratios

  • Author: ChemistryViews
  • Published: 28 September 2011
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Rapid Communications in Mass Spectrometry/John Wiley & Sons
thumbnail image: Guidelines for Isotope and Gas Ratios

The Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry recently recognized that there is confusion about the notation of delta values in isotope studies. The delta value (δ) is used to express the relative difference of a ratio of the numbers (or the amounts) of two isotopes in a specimen compared with that of a reference, commonly an international measurement standard. Results of such isotopic measurements are used in anthropology, atmospheric sciences, biology, chemistry, environmental sciences, food and drug authentication, forensic applications, geochemistry, geology, oceanography, and paleoclimatology.


Tyler B. Coplen, U.S. Geological Survey, Virginia, USA, has clarified the terminology and concepts behind the terms involved in expressing relative differences in stable isotope ratios. His guidelines also provide information on the reporting of relative differences in ratios of volumes, numbers of molecules, and amounts of gases.


Article Views: 2646

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH