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Vapor recognition with an integrated array of polymer-coated flexural plate wave sensors.

Authors
Cai-QY; Park-J; Heldsinger-D; Hsieh-MD; Zellers-ET
Source
Sens Actuators B Chem 2000 Feb; 62(2):121-130
NIOSHTIC No.
20030920
Abstract
Preliminary testing of a prototype instrument employing an integrated array of six polymer-coated flexural plate wave (FPW) sensors and an adsorbent preconcentrator is described. Responses to thermally desorbed samples of individual organic solvent vapors and binary and ternary vapor mixtures are linear with concentration, and mixture responses are equivalent to the sums of the responses of the component vapors, which co-elute from the preconcentrator in most cases. Limits of detection as low as 0.3 ppm are achieved from a 60-s (34 cm3) air sample and peak widths at half-maximum range from 1 to 4 s. Tests at different flow rates suggest that the kinetics of vapor sorption in the sensor coating films may limit responses at higher flow rates, however, low data acquisition rates may also be contributory. Assessments of array performance using independent test data and Monte Carlo simulations with pattern recognition indicate that individual vapors and certain binary and ternary mixtures can be recognized/discriminated with very low error. More complex mixtures, and those containing homologous vapors, are problematic. This is the first report demonstrating multi-vapor analysis with an integrated FPW sensor array.
Keywords
Vapors; Vapor-detectors; Organic-solvents; Solvents; Sampling; Sampling-methods
Contact
Department of Environmental Health Sciences, University of Michigan, 109 S. Observatory St., Ann Arbor, MI 48109-2029, USA
CODEN
SABCEB
Publication Date
20000225
Document Type
Journal Article
Email Address
ezellers@umich.edu
Funding Type
Grant
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003692
Issue of Publication
2
ISSN
0925-4005
Source Name
Sensors and Actuators B: Chemical
State
MI
Performing Organization
University of Michigan, Ann Arbor
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