δ¹³C测量的新指南。

New guidelines for delta13C measurements.

作者信息

Coplen Tyler B, Brand Willi A, Gehre Matthias, Gröning Manfred, Meijer Harro A J, Toman Blaza, Verkouteren R Michael

机构信息

U.S. Geological Survey, 431 National Center, Reston, Virginia 20192, USA.

出版信息

Anal Chem. 2006 Apr 1;78(7):2439-41. doi: 10.1021/ac052027c.

DOI:10.1021/ac052027c

PMID:16579631

Abstract

Consistency of delta13C measurements can be improved 39-47% by anchoring the delta13C scale with two isotopic reference materials differing substantially in 13C/12C. It is recommended that delta13C values of both organic and inorganic materials be measured and expressed relative to VPDB (Vienna Peedee belemnite) on a scale normalized by assigning consensus values of -46.6 per thousand to L-SVEC lithium carbonate and +1.95 per thousand to NBS 19 calcium carbonate. Uncertainties of other reference material values on this scale are improved by factors up to two or more, and the values of some have been notably shifted: the delta13C of NBS 22 oil is -30.03 per thousand.

摘要

通过使用两种13C/12C比值差异显著的同位素参考物质来校准δ13C标度，δ13C测量的一致性可提高39% - 47%。建议测量有机和无机材料的δ13C值，并相对于维也纳皮迪阶拟箭石化石（VPDB）表示，该标度通过将L - SVEC碳酸锂的共识值设定为-46.6‰和NBS 19碳酸钙的共识值设定为+1.95‰进行归一化。在此标度上，其他参考物质值的不确定度最多可降低两倍或更多，并且一些值发生了显著变化：NBS 22油的δ13C为-30.03‰。