Absolute isotope ratios defining isotope scales used in isotope ratio mass spectrometers and optical isotope instruments.

CONCLUSIONS: The use of different RStd values may lead to differences in the isotope delta values obtained if the normalization versus working standard gas is applied. For the range of Rstd used in the proprietary software, the potential differences are lowest for oxygen (<0.002 ‰) and nitrogen (<0.001 ‰) and highest for carbon (0.107 to 0.112 ‰) and sulphur (0.023 ‰). Evaluation of the existing Rstd values and recommendations for the best estimates are highly desirable to ensure worldwide consistency in stable isotope data reporting.
PMID: 32662909 [PubMed - as supplied by publisher]

Source: Rapid Communications in Mass Spectrometry : RCM - July 13, 2020 Category: Chemistry Authors: Skrzypek G, Dunn PJH Tags: Rapid Commun Mass Spectrom Source Type: research