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Vapor recognition with surface acoustic wave sensor arrays.

Authors
Zellers-ET
Source
Proceedings of the 4th Annual East Asian Conference on Chemical Sensors, November 23-26, 1999, Hsinchu, Taiwan, 1999 Nov; :10-20
Link
NIOSHTIC No.
20030734
Abstract
Arrays of polymer-coated surface-acoustic-wave (SAW) vapor sensors were first reported in the 1980's [1-2] and have been the subject of intensive research and development efforts over the past decade [3,4]. Our primary interest in SAW sensor arrays stems from the potential for incorporating them into miniaturized instrumentation for assessing human exposures to toxic organic vapors encountered in the workplace and in the general environment. Toward this end we have explored various fundamental aspects of sensor-array design and operation, developed and tested prototype instruments and sub-systems for personal exposure monitoring and exhaled breath monitoring, and we are currently assessing the performance of such instruments for field testing the permeation resistance of chemical protective clothing for emergency responders and for assessing indoor air quality where dozens of organic compounds can be encountered at low-part-per-billion exposure levels. Regardless of the specific application, a number of issues have arisen in the course of this research that might be considered generic to the development of SAW sensor arrays and associated instrumentation for organic vapor analysis. Among these are 1) designing the array for optimal selectivity through strategic coating selection; 2) assessing the limits of detection, recognition, and discrimination; 3) determining the minimum number of sensor required for a given analysis; 4) miniaturization; and 5) incorporating sample capture, preconcentration, and separation stages with the array to enhance analytical performance. In this presentation, we will highlight some of the work we have done to address these issues.
Keywords
Vapors; Toxins; Toxic-vapors; Toxic-effects; Occupational-exposure; Emergency-response; Emergency-responders; Protective-clothing; Organic-compounds; Exposure-levels; Exposure-assessment; Air-quality; Air-quality-control; Air-quality-monitoring; Organic-vapors
Publication Date
19991123
Document Type
Conference/Symposia Proceedings
Email Address
ezellers@umich.edu
Funding Type
Grant
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003692
Source Name
Proceedings of the 4th Annual East Asian Conference on Chemical Sensors, November 23-26, 1999, Hsinchu, Taiwan
State
MI
Performing Organization
University of Michigan, Ann Arbor
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