Materials with known ¹³C, ¹⁸O, and ⁷Li isotopic composition

IAEA-CO-1, Marble

Unit Size: 0.5 g
Price per Unit: 130 €
Report: IAEA-TECDOC-825
Date of Release: September 1995

A Carrara marble supplied to IAEA by IMEG, Vareggio, Italy, was originally intended as ¹⁴C quality control material IAEA-C1. The fraction of the material ground to a fine powder with grain size below 100μm is called IAEA-CO-1 and is intended for stable isotope measurements [1]. Its recommended δ¹³C value was determined in an international calibration exercise [2]. The recommended δ¹⁸O value is a mean from data of an interlaboratory comparison study [1].

Analyte	Value	Unit	SD	R/I/C
δ13C	+2.492	‰VPDB	0.030	C
δ18O	-2.4	‰VPDB	0.1	R

(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)

References:

1. Stichler, W., Interlaboratory Comparison of new materials for carbon and oxygen ratio measurements. Proceedings of a consultants meeting held in Vienna, 1 - 3. Dec. 1993, IAEA-TECDOC-825, 67 74 (1995).
2. Coplen T.B., Brand W.A., Gehre M., Gröning M., Meijer H.A.J., Toman B., Verkouteren R.M. (2006): New Guidelines for ¹³C Measurements. Anal. Chem. 78, 2439-2441.