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Comment on “Two New Carbonate Stable Isotope Standards”
Author(s) -
COPLEN Tyler,
KENDALL Carol,
BARNES I. Lynus
Publication year - 1982
Publication title -
geostandards newsletter
Language(s) - English
Resource type - Journals
eISSN - 1751-908X
pISSN - 0150-5505
DOI - 10.1111/j.1751-908x.1982.tb00361.x
Subject(s) - confusion , agency (philosophy) , stable isotope ratio , carbonate , isotope , atomic energy , calcium carbonate , chemistry , mineralogy , philosophy , epistemology , physics , psychology , organic chemistry , quantum mechanics , psychoanalysis
Friedman et al (1) propose that NBS 19 calcium carbonate substitute for PDB. This is in apparent conflict with the recommendation of the September 1976 consultants’ meeting convened by the International Atomic Energy Agency on stable isotope standards. Furthermore, Friedman et al suggest ɛ‐values be adopted for NBS 19 that do not take into account the ɛ‐values of NBS 20 (Solenhofen limestone). We believe that adoption of these proposals may lead to confusion in the stable isotope literature and to lack of correspondence between historic and future isotopic results. In sharp contrast to the results of Friedman et al (1), we find NBS 20 to be a satisfactory reference material if it is handled properly.