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Facilities

 

Technical Capabilities

 

GIGL maintains a Thermo Scientific Triton PLUS thermal ionization mass spectrometer that is capable of operating in both positive and negative ion mode. The Triton is capable of precise measurement of Nd, Sr, U, Th, Ca and B isotope ratios in positive ion mode, and Os and B isotope ratios in negative ion mode. The Triton is equipped with 10 Faraday collectors, and is capable of using a combination of 1010, 1011 and 1012 Ohm amplifiers. It is currently equipped with 1011 amplifiers on the Faradays, six electron multipliers for ion counting measurements, and RPQ energy filters on two of the SEMs.

In addition to the TIMS, the facility also includes a Nano-Magnetic Levitation Balance equipped with a vacuum system for high-resolution gas adsorption measurements at cryogenic temperatures, also known as a "nano-scale BET". The device is capable of measuring the mass of milligram-sized samples to nanogram precision and, as applied to BET measurements, specific surface areas as small as 10 m2/g on milligram-sized dust or sediment samples.

The Department of Earth and Environmental Sciences at the University of Michigan has a number of other analytical facilities that GIGL complements including stable isotope IR labs, a noble gas lab, the Biogeochemistry lab (BEGL) that maintains a Nu Instruments MC-ICPMS, and the Keck Lab that maintains two Thermo Scientific Element ICP-MS machines.

Clean Lab and Freezer Space

 

The GIGL maintains a 1000-square-foot clean laboratory, more than half of which is be dedicated clean chemistry space for low-blank separations of elements of interest for isotopic measurements and nano-scale BET measurements of the surface area of dust. The air quality throughout the chemistry lab is maintained at a general level of class 1,000 air while hood space is class 10. The laboratory is equipped with sufficient hood and workspace to allow it to be used by up to eight workers simultaneously. The nano-scale BET workroom is isolated to maintain magnetic field, thermal and vibration insulation.

In addition to the chemistry and nano-scale space, the facilities include a 200-square-foot walk-in freezer and sample preparation space equipped with electrical outlets, compressed air and vacuum lines.

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