I've also attempted carbonates in tin capsules by EA, including
L-SVEC and NBS-19.  Big delta was 49 per mill between lithium
carbonate and toilet seat.

>NBS 19 calcium carbonate, L-SVEC lithium carbonate, and IAEA-CO-1 calcium
>carbonate were analyzed by Qi et al., Two new organic reference materials
>for delta 13C and delta 15N measurements and a new value for the delta 13C
>of NBS 22 oil, Rapid Commun. Mass Spectrom., v. 17, 2483-2487 (2003).
>Analytical details for EA combustion are given therein.
>TBC


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********************************
Steve Nelson
Dept. of Geology
S389 ESC
Brigham Young University
Provo. Utah  84602

voice:    1-801-422-8688
lab:      1-801-422-5124
FAX:      1-801-422-0267

CARPE CARP:  seize the fish
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