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Hansen B.J.,Brigham Young University | Niemi R.J.,Brigham Young University | Hawkins A.R.,Brigham Young University | Lammert S.A.,Torion Technologies | Austin D.E.,Brigham Young University
Journal of Microelectromechanical Systems | Year: 2013

We present a linear type radiofrequency ion trap mass spectrometer consisting of metal electrodes that are lithographically patterned onto two opposing planar ceramic substrates. An electric field for ion trapping is formed by applying specific voltage potentials to the electrode pattern. This technique represents a miniaturization approach that is relatively immune to problems with surface roughness, machining complexity, electrode misalignment, and precision of electrode shape. We also present how these traps allow a thorough study of higher order nonlinear effects in the trapping field profile and their effect on mass analyzer performance. This trap has successfully performed mass analysis using both a frequency sweep for resonant ion ejection, and linear voltage amplitude ramp of the trapping field. Better-than-unit mass resolution has been achieved using frequency sweep mass analysis. Mass resolution (m/Δm) has been measured at 160 for peaks of m/z values less than 100. [2012-0380] © 1992-2012 IEEE. Source


Smith P.A.,Uniformed Services University of the Health Sciences | Smith P.A.,Salt Lake Technical Center | Roe M.T.A.,3M | Sadowski C.,Smiths Detection | Lee E.D.,Torion Technologies
Journal of Occupational and Environmental Hygiene | Year: 2011

A newly developed person-portable gas chromatography-mass spectrometry (GC-MS) system was used to analyze several solvent standards, contact cement, paint thinner, and polychlorinated biphenyl samples. Passive solid phase microextraction sampling and fast chromatography with a resistively heated low thermal mass GC column were used. Results (combined sampling and analysis) were obtained in <2 min for solvent, contact cement, and paint thinner samples, and in <13 min for the polychlorinated biphenyl sample. Mass spectra produced by the small toroidal ion trap detector used were similar to those produced with heavily used transmission quadrupole mass spectrometers for polychlorinated biphenyl compounds, simple alkanes, and cycloalknes, while mass spectra for benzene and the ketone compounds analyzed showed evidence for ion/molecule reactions in the ion trap. For one of the contact cement samples analyzed, no evidence was found to indicate the presence of n-hexane, although the relevant material safety data sheet listed this ingredient. Specific chemical constituents corresponding to a potentially wide range of petroleum distillate compounds were identifiable from GC-MS analyses. The possibility for an improved basic characterization step in the exposure assessment process exists with the availability of fast, person-portable GC-MS, although work is needed to further refine this tool and understand the best ways it may be used. Source


Lammert S.A.,Torion Technologies
NATO Science for Peace and Security Series A: Chemistry and Biology | Year: 2014

The emergence of microelectromechanical systems (MEMS) fabrication techniques is prevalent in modern electronics, personal communications systems and many other everyday devices that continually become smaller and more capable. Mass spectrometry (MS) (Fox J, Saini R, Tsui K, Verbeck G, Rev Sci Instrum 80(9):93302–93306, 2009), too has benefited from these fabrication techniques and as a result, there has been an increased focus on instrument miniaturization and field portability. Much of the effort in this area has been in the miniaturization of the mass analyzer where even micron-sized analyzers have been reported. However, the miniaturization of the mass analyzer is not the only barrier to system size reduction. Much of the support hardware (pumping systems, ionization sources, detectors, etc.) has not scaled proportionally, either in size or operational capability. Often the batteries are the largest/heaviest components in a miniature system and, despite improvements in battery technologies, power is still a major limitation for field portability. In addition to MS hardware, the methods for sample acquisition, processing and introduction must be reduced with respect to complexity, size and power requirements while still maintaining sufficient analytical efficiency for adequate detection specifications. Finally, the systems must be easy to use by nonexpert operators. All of these analytical figures of merit interplay in such a way that significant tradeoffs must be made when designing a field-portable instrument for a particular application.The three talks presented at the 2013 NATO Advanced Studies Institute in Sienna Italy and summarized in this chapter cover the progress and obstacles in miniaturization of MS components as well as the interdependencies of the instrumental figures of merit, analytical performance and field applications as they pertain to field-portable miniature MS. The talks included examples from the speakers’ past and current fieldable instrument development projects. © Springer Science+Business Media Dordrecht 2014. Source


Trademark
Torion Technologies | Date: 2012-06-12

Computer software for analyzing data from scientific analysis of chemical compounds; computer software for analyzing data from chromatographic analysis of chemical compounds; computer software for analyzing data from gas chromatographic analysis of chemical compounds; computer software for identifying chemical compounds from data obtained by chromatographic analysis; computer software for identifying chemical compounds from data obtained by gas chromatography; all of the foregoing sold as a component part of portable chromatographs and/or mass spectrometers; computer software for analyzing data from scientific analysis of chemical compounds; computer software for analyzing data from chromatographic analysis of chemical compounds; computer software for analyzing data from gas chromatographic analysis of chemical compounds; computer software for identifying chemical compounds from data obtained by chromatographic analysis; computer software for identifying chemical compounds from data obtained by gas chromatography; all of the foregoing software products are for use in detecting organic compounds and are not for use in detecting non-organic compounds.


Grant
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase II | Award Amount: 729.99K | Year: 2009

This project proposes the development and optimization of a compact air sampler/reactor system for collection of bacterial endospores and conversion of them into semivolatile biological marker compounds for the rapid detection of target airborne pathogens. This involves the integration of a compact particle impactor with a heated reactor for conducting controlled thermochemolysis and methylation. Samples will be analyzed using a novel coiled wire sampling device for optional automatic transfer of sample from the reactor to a compact gas chromatograph-mass spectrometer. The biological marker compounds that will be targeted include dipicolinic acid, fatty acids, carbohydrates, and selected amines. The analytical system will be designed to be robust against non-target endospores, vegetative bacteria, environmental contaminants, and variations in bacterial growth conditions, such as growth media and temperature. A classification algorithm using a selected set of identified biological marker compounds will be used to rapidly discriminate between biological sources. The instrumentation, methodology, and classification algorithm will be used to determine the permeation rates of biological particles through military personal protective equipment and for sampling and detection of airborne biological particles in ambient air.

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