Coplen, T.
, Brandt, W.
, Gehre, M.
, Groning, M.
, Meijer, H.
, Toman, B.
and Verkouteren, J.
(2006),
New Guidelines for d13C Measurements, Analytical Chemistry
(Accessed July 22, 2025)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
New Guidelines for d13C Measurements
Published
Author(s)
T Coplen, W A. Brandt, M Gehre, Manfred Groning, HAJ Meijer, ,
Abstract
Consistency of 13C measurements can be improved 39-47% by anchoring the 13C scale with two isotopic referencematerials differing substantially in 13C/12C. It isrecommended that 13C values of both organic andinorganic materials be measured and expressed relativeto VPDB (Vienna Peedee belemnite) on a scale normalizedby assigning consensus values of -46.6 to L-SVEClithium carbonate and +1.95 to NBS 19 calciumcarbonate. Uncertainties of other reference material valueson this scale are improved by factors up to two ormore, and the values of some have been notably shifted:the 13C of NBS 22 oil is -30.03 .Citation
Analytical Chemistry
Volume
78 No 7
Pub Type
Journals
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact [email protected].
Created March 31, 2006, Updated October 12, 2021