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 Isoprobe Inductively-Coupled Plasma Mass Spectrometer |
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An IsoProbe inductively-coupled plasma mass spectrometer manufactured by MicroMass (now GV Instruments) was installed in the Department of Geological Sciences during the spring of 2002. The IsoProbe is a single-focusing, magnetic-sector mass spectrometer with an inductively-coupled plasma source and a multiple-cup collector. On the IsoProbe, ions extracted from the inductively-coupled plasma source pass through a hexapole collision cell that thermalizes the beam to reduce ion energy spread and reduces argide interferences. The magnetic sector on the IsoProbe in the Department of Geological Sciences has continuously adjustable slits allowing resolutions of up to 3000 to be achieved. The collector assembly on our IsoProbe includes nine faraday collectors, three ion-counting channeltrons, as well as an ion-counting Daly detector with a wide aperture retarding potential (WARPTM) filter that increases abundance sensitivity by two orders of magnitude. Optional sample introduction systems include an Aridus microconcentric desolvating nebulizer and New Wave UP193FX fast excimer laser ablation unit. This combination of features on the IsoProbe in the Department of Geological Sciences provides us with great analytical flexibility to measure isotopic compositions and elemental concentrations in a wide variety of geologic (and other) materials. The IsoProbe is housed in a HEPA-filtered clean-laboratory, and sample preparation is accomplished in one of three HEPA-filtered, class 100, clean-room laboratories in the department. |
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Contact: Zhaoping Yang |
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