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A Mass Spectrometer for Elemental Analysis based on Fieldable Technologies
EP21839
Poster Title: A Mass Spectrometer for Elemental Analysis based on Fieldable Technologies
Submitted on 03 Mar 2014
Author(s): Hilary Brown, Jennifer Speer, John Gerling, and Kenyon Evans-Nguyen
Affiliations: The University of Tampa Department of Chemistry, Biochemistry, and Physics, Gerling Applied Engineering
This poster was presented at Pittcon 2014
Poster Views: 2,799
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Poster Information
Abstract: Laser ablation (LA) can facilitate direct analysis of solid samples for mass spectrometry (MS), and is often coupled with an inductively coupled plasma torch (ICP). LA-ICP-MS is now widely used for accurate elemental and isotopic analysis; however, the technique is not fieldable, primarily due to the gas and power requirements of the ICP torch. A mass spectrometer system for elemental and isotopic analysis using technology that is amenable to portable instrumentation is being studied. Solid samples are being ablated with an excimer laser and the resulting particle and ion plume will flow through a microwave plasma torch (MPT) and into an ion trap mass spectrometer. Preliminary data confirms that using laser ablation directly coupled with an ion trap mass spectrometer is a viable technique for detecting metals (e.g., lead, cobalt) and refractory compounds (e.g., strontium titanate). Current efforts are focused on enhancing sensitivity by incorporating a custom MPT, a modification of a design by Bilgic and co-workers which is being fabricated and tested. While we anticipate that LA-MPT-MS will have somewhat reduced sensitivity relative to LA-ICP-MS, MPTs, laser ablation and ion trap mass spectrometers can all be incorporated into portable instruments. This unique LA-MPT-MS instrumentation is promising for rapid elemental and isotopic analysis in the field.
Summary: Laser ablation and a Microwave Plasma Torch (MPT) were coupled in order to obtain elemental information from solid samples. The MPT was incorporated as a less costly and more portable alternative to the ICP. MPT was also added to help improve the signal from just the laser ablation alone. References: Bilgic, A. M.; Prokisch, C.; Broekaert, J. A. C.; Voges, E. Spectrochim. Acta Part B At. Spectrosc. 1998, 53, 773–777.Report abuse »
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