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Center for Applied Isotope Studies

We are now accepting samples for C/N Isotopes in Solids and C/O Isotopes in Carbonates.  Please contact cais@uga.edu for additional information about sample submissions. 

METHOD SUMMARY

We analyze pretreated solid carbonate samples for the stable isotope ratios of δ13C and δ18O using a Thermo Gas Bench II coupled to a Thermo Delta V-IRMS with a GC Pal auto-sampler. Typical samples include modern or fossil bioapatites (bone and teeth), shell, and foraminifera. Weighed samples are transferred to exetainers, purged of atmosphere with helium, and acidified with 100% phosphoric acid to convert solid carbonates to CO2 gas.

SAMPLE SCOPE

Samples should be ground to homogenous fine granules or powder. Poor precision, especially for bone/dentine/enamel, can often be traced to inadequate grinding that leaves large chunks of material.  

Analyte description Ideal sample amount
Bone/dentine/enamel bioapatite3 – 4 mg*
Modern bone/otoliths1 – 2 mg*
Shell/Foraminifera0.2 – 0.3 mg
Marble0.5 – 0.6 mg
Water for headspace analysisinquire
For all other samples types, please inquire

*If your available sample amount is an issue, our high-sensitivity “Precon” may be an option for smaller amounts. The target gas is concentrated as a frozen solid within a loop submerged in a liquid nitrogen bath. The gas is then released back into the helium carrier gas to the IRMS upon removal of the loop from the nitrogen bath. 

ANALYTICAL FEES

Prices are listed for non-profit clients. 

Analyte Description, Instrumentation Processing Price (all prices are per sample) On-campus/Off-campus
13C & 18O: Analysis by GasBench-IRMS $10.00/$15.00
13C & 18O: Weighing $2.75/$3.00
13C & 18O: Acidification$2.75/$3.00
13CO2: Manual Injection and Analysis by GasBench-IRMSinquire
13C in water by DIC-IRMSinquire
Katherine Reinberger
Katherine Reinberger

Assistant Research Scientist

706-542-7361

Lab: CO-PI of Stable Isotope Ecology Lab

Resources

SIEL Submission Forms

Related Services

C & N Elemental Analysis and Isotopes of Plant, Soils, & Animal Tissues

Stable Isotopes for Archaeology and Paleontology

Facilities

Stable Isotope Ecology Laboratory

Questions or Comments for CAIS?

UGA CENTER FOR APPLIED ISOTOPE STUDIES, 120 Riverbend Road, Athens, GA 30602-4702

UGA CENTER FOR APPLIED ISOTOPE STUDIES

120 Riverbend Road
Athens, GA 30602-4702

Contact

   Phone: 706-542-1395
   Fax: 706-542-6106
   cais@uga.edu

A Unit of

The University of Georgia Office of Research logo