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Analysis and Equipment

We perform high-precision carbonate δ13C and δ18O analyses with a Thermo Scientific Kiel IV Automated Carbonate Device coupled to a Thermo Scientific  MAT 253 dual inlet isotope ratio mass spectrometer (IRMS). Our instrument is capable of analyzing CaCO3 samples as small as 10 μg, making our facility a viable option for specialized carbonate samples such as individual foraminifera.

We routinely analyze an incredibly broad range of organic sample types for bulk total organic carbon, total organic nitrogen, δ13C, and δ15N compositions via Carlo Erba NA 1500 Elemental Analyzer with a Costech Zero-Blank Autosampler. Sample gases are introduced to a Thermo Scientific DELTAplusXP isotope ratio mass spectrometer for analysis through a Thermo Scientific ConFlo III continuous flow peripheral device.

Natural water DIC, soil gas, breath gas, etc. δ13C analyses are available using continuous flow headspace sampling via a Thermo Scientific GasBench II also connected to our DELTAplusXP IRMS. 

Water δ18O and δD analyses are performed via Picarro Li2120 Cavity Ring-Down Spectrometer (CRDS). Water δ18O and δD analyses are also available using headspace equilibration methods on the GasBench II upon special request, or for samples with high dissolved organic contents that would interfere with cavity ring own analysis.

Next year we will be adding instrumentation for clumped isotope analyses of carbonates and triple oxygen isotopes, as well as a second IRMS.

We at SIGF pride ourselves in method development and doing everything within and beyond our current abilities to meet the analytical requirements of our customers. We explicitly welcome inquiry as to whether unique and unconventional samples can be analyzed, and we will continually work to adapt our analytical capabilities to the specific needs of individual researchers, clients and students. 

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