The University of Chicago Stable Isotope Ratio facility--now defunct
| Resources--see acknowledgements too | Research Institutes: 1950-2012
|
| Mass Specs!!! mostly retired now | How we measure light stable isotopes |
DeltaV |
Cups: Gases: CO2, N2, CO, H2 and SO2 Isotopes: 13C, 18O, 15N, D/H, 34S Peripherals: DI, GasbenchII, ConfloIV, EA, TCEA (top) |
Mat253--decommissioned |
Cups: Gases: CO2, N2, CO, O2 Isotopes: 13C, 18O, 15N Isotopologues: D47 (CO2), D31 (CO) Peripherals: DI, prep on vacuum line (top) |
| Peripherals!!! mostly shut down now | How we get samples into the mass specs. |
GasbenchII |
Headspace
gas analysis 18O Water: CO2-water equilibration D/H Water: H2-water equilibration with catalyst Carbonates: add 105% phosphoric acid DIC: add water to vial with 85% phosphoric acid DOC??? Wet digestion in exetainer vial Breath: corn-syrup shots (top) |
Costech
EA--in pieces |
Burn
baby burn Combusts organic compounds 15N and 13C as N2 and CO2 respectively amount percent ratios too periodically run 32S as SO2 Burning tin capsule decomposes inorganics acid treatment can remove inorganic C (top) |
TCEA--mothballed |
1450
C--Is it hot enough for you? Really hot carbon reduction D/H as H2 18O as CO for 18O off phosphates, sulfates and nitrates D/H off hydrous minerals also runs dry organic material (top) |
Conflo
IV  |
Directs
sample He streams form EA or TCEA to mass spec Automated linearity checks Potential for auto-dilution on samples (EA only) (top) |
| Other Toys--these are gone now | |
Shimadzu
GC-FID--gone |
methanizer!!! (top) |
Vacuum
Line--shipped off |
No,
vacuum does not suck Clean up CO2 for isotopologue work Convert CO to CO2 and clean it up Vacuum roasting. Old school carbonates. (top) |
| Acknowledgements:
The purchases of the major pieces of
equipment, mass
spectrometers and peripherals, were supported by NSF
award #0923831.
"This award is funded under the American
Recovery and
Reinvestment Act of 2009 (Public Law 111-5)."
And many thanks
to
the U of C for the needed renovations and added
support for the
laboratory. (top) |