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First-generation hybrid MEMS gas chromatograph.

Authors
Lu-CJ; Steinecker-WH; Tian-WC; Oborny-MC; Nichols-JM; Agah-M; Potkay-JA; Chan-HK; Driscoll-J; Sacks-RD; Wise-KD; Pang-SW; Zellers-ET
Source
Lab Chip 2005 Oct; 5(10):1123-1131
NIOSHTIC No.
20028858
Abstract
The fabrication, assembly, and initial testing of a hybrid microfabricated gas chromatograph (microGC) is described. The microGC incorporates capabilities for on-board calibration, sample preconcentration and focused thermal desorption, temperature-programmed separations, and "spectral" detection with an integrated array of microsensors, and is designed for rapid determinations of complex mixtures of environmental contaminants at trace concentrations. Ambient air is used as the carrier gas to avoid the need for on-board gas supplies. The microsystem is plumbed through an etched-Si/glass microfluidic interconnection substrate with fused silica capillaries and employs a miniature commercial pump and valve subsystem for directing sample flow. The latest performance data on each system component are presented followed by first analytical results from the working microsystem. Tradeoffs in system performance as a function of volumetric flow rate are explored. The determination of an 11-vapor mixture of typical indoor air contaminants in less than 90 s is demonstrated with projected detection limits in the low part-per-billion concentration range for a preconcentrated air-sample volume of 0.25 L.
Keywords
Gas-chromatography; Environmental-contamination; Silica-dusts; Silicates; Air-contamination; Air-sampling; Air-samples
Publication Date
20051001
Document Type
Journal Article
Funding Type
Grant
Fiscal Year
2006
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003692
Issue of Publication
10
ISSN
1473-0197
Source Name
Lab on a Chip
State
MI
Performing Organization
University of Michigan, Ann Arbor
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