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

LSVEC, Lithium Carbonate

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

LSVEC^* lithium carbonate was prepared by H. Svec, Iowa State University [1], originally to be used as a reference material for lithium isotopic composition. Due to the quite negative δ¹³C value of this carbonate, it was much more frequently used as carbon stable isotope reference material [2]. In 2006 new guidelines were published for δ¹³C calibration, and recommend in addition to the use of the calibration material NBS-19 the additional use of an assigned δ¹³C value for LSVEC reference material to obtain an improved two-point calibration [3]. The recommended δ¹⁸O values of LSVEC are based on statistically evaluated results of an intercomparison exercise [2].

Analyte	Value	Unit	SD	R/I/C
δ13C	-46.6	‰	0.2	R
δ18O	-26.7	‰VPDB	0.2	R
6Li/7Li	0.08215	6Li/7Li	0.00023	R

(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
[*] "absolute" Li isotope ratio measured

References:

1. Flesch, G. D., Anderson Jr., A. R., Svec, H.J. (1973): A secondary isotopic standard for 6Li/7Li determinations. International Journal of Mass Spectrometry and Ion Physics, vol. 12, (1973), pp. 265 272
2. 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)
3. 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.