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Stable Isotope Lab at Virginia Tech

Stable Isotope Laboratory

The centerpieces of this laboratory are two Isoprime 100 isotope ratio mass spectrometers. Both instruments are configured for continuous flow sample preparation and can determine the stable isotope compositions of carbon, nitrogen and sulfur of a variety of materials.
Isoprime 100 isotope ratio mass spectrometer

The first mass spectrometer is interfaced with an Elementar vario ISOTOPE cube elemental analyzer. This instrument can measure the stable isotopes of sulfur (δ34S) in both sulfate and sulfide minerals and features an expanded collector array for more precise analysis of sulfur isotope compositions. This mass spectrometer can also be configured to measure the stable isotope composition of carbon (δ13C) and nitrogen (δ15N) in bulk organic matter. Analyses are achieved through combustion of the samples in vario ISOTOPE cube, which generates carbon dioxide (CO2), nitrogen (N2), and sulfur dioxide (SO2) gas. These gases are then introduced to the mass spectrometer for the analysis of their stable isotope composition.

Isoprime 100 isotope ratio mass spectrometer

The second mass spectrometer is interfaced with a MultiFlow-Geo headspace sampler and is primarily configured to analyze the stable isotope composition of carbon and oxygen of carbonate minerals, such a calcite, aragonite and dolomite. This is achieved through the acidification of the carbonate samples at a constant temperature in sealed vials. The acidification produces CO2 gas that is then sampled by the MultiFlow-Geo and introduced into the mass spectrometer for analysis of its stable carbon and oxygen isotope composition.

Rates for Stable Isotope Analyses

Our stable isotope laboratory is open to other investigators from both inside and outside of Virginia Tech. If you are in interested in using the stable isotope lab please contact Ben Gill. Rates for stable isotope analyzes can be found below.
Carbon and oxygen isotope analysis of inorganic carbon Carbon isotope analysis of solid sample material Nitrogen isotope analysis of solid sample material Sulfur isotope analysis of solid sample material Sulfide abundance in solid sample material Sulfate abundance in solid sample material
Rates for users internal to Virgina Tech $10.85  $10.66  $10.57  $10.48  $6.28  $8.08
Rates for users external to Virgina Tech  $17.50  $17.20  $17.00  $16.90  $10.10  $13.00



Stable Isotope Lab at Virginia Tech

Wet Chemistry Laboratory

The wet chemistry laboratory contains two fume hoods, benches and sample storage. This lab has a water distillation system, sulfide distillation lines, drying ovens, a centrifuge, ball mill, balances and a UV/visible light spectrometer.