Geological Sciences and

Geological Engineering

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Stable Isotope Lab

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DELTAplusXP Stable Isotope Ratio Mass Spectrometer

This generation of IRMS technology is a universal tool for 13C/12C, and 15N/14N, 18O/16O, 34S/32S, D/H determination in both dual inlet and continuous flow modes. A wide range of detector configurations allows for the development of novel techniques. The DELTAplusXP is a stable isotope ratio mass spectrometer for both routine and research applications.

GasBench II, EA and TC/EA

Universal on-line gas preparation and introduction system for IRMS. An innovative tool for generating high precision on-line isotope ratio determination of gas species, waters and carbonates. The GasBench II combines dual inlet precision and accuracy with the high throughput of continuous flow technology. The various applications include, but are not limited to: water equilibration with CO218O/16O, carbonate 13C/12C and 18O/16O, dissolved inorganic carbon (DIC) 13C/12C, determination of 13C/ 12C of CO2 and 15N/14N in air. The TC/EA high temperature conversion allows for direct continuous flow determination of 18O/ 16O and D/H enhancing the capabilities of the two existing QFIR conventional EA (elemental analysers) which currently permit on-line isotope ratio analysis of organic bulk samples for 13C/12C, 15N/14N and 34S/ 32S.

Trace Gas Chromatograph

In addition to both stand alone and continuous flow GC operation of present technology, the Trace GC expands capabilities from the existing GC/C/TC/IRMS (gas chromatography / combustion /thermochemical pyrolysis/ isotope ratio mass spectrometer). It incorporates compound specific isotopic analysis (CSIA) from 13C/12C and 15N/14N to include 18O/ 16O and D/H.

Finnigan MAT 252 IRMS

Stable Isotope Ratio Mass Spectrometer coupled to the MAT 252 using continuous flow technology is a Hewlett Packard - HP5890 Series II gas chromatograph and a Carlo Erba Elemental Analyzer: NCS 2500.

Hewlett Packard - HP5890 Series II Gas Chromatograph

Similar to the Trace Gas Chromatograph the HP will function in stand alone and continuous flow GC operation. The HP 5890 is also interfaced for GC/C/IRMS (gas chromatography / combustion / isotope ratio mass spectrometer). It incorporates compound specific isotopic analysis (CSIA) for 13C/12C.

Thermo Finnigan HDevice

This peripheral is used to determine the D/H ratio for water samples (brines and fresh waters). A column containing Cr powder is heated to 850°C in order to reduce water (H2O) to hydrogen gas (H2). The HDevice is coupled to the dual inlet on any of the IRMS in the stable isotope lab, and is designed to analyze a small volume of sample (1 uL).

Silicate Extraction Line

Oxygen isotope analyses of silicate and oxide minerals and of whole rock samples are conducted using the BrF5 extraction method. Approximately 5 mg of finely ground sample are loaded into Ni reaction tubes and reacted with BrF5 at 575°C overnight. The extracted oxygen is converted to CO2 in contact with a heated graphite rod and the CO2 is then analysed off-line using a Finnigan MAT 252.

Carbonate Extraction Line

The carbonate extraction line is used to extract CO2 from phosphoric acid digestion of carbonates.

Thermo-Finnigan MAT 253 IRMS

The Thermo-Finnigan MAT 235 with 8 cup configuration allows the simultaneous measurement of masses of six isotopologues (44, 45, 46, 47, 48, and 49) of CO2. The principle purpose of this instrument is to measure ?47 values of carbonates. This instrument also measures d13C, d18O, d15N and dD values of different materials using both dual inlet and continuous flow modes.