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Proceedings Paper

Perchloroethylene detection in air: a comparative study using polymer sensor elements and catalyst/sensor systems
Author(s): Klaus-Dieter Schierbaum; S. Vaihinger; M. Haug; Wolfgang Goepel
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Paper Abstract

In a first approach, perchloroethylene (C2Cl4 or 'PER') was determined quantitatively in air by monitoring mass and temperature changes of polymer-coated quartz microbalance and calorimetric transducers. The different equilibrium and time-dependent sensor responses result from reversible interactions between perchloroethylene molecules from the gas phase and chemically sensitive polymers based upon modified siloxanes. In a second approach, we determined PER by applying pattern recognition methods to evaluate data from catalyst/electrochemical sensor-systems. Here, PER is decomposed at a heated catalytic filament. The molecular fragments are detected subsequently by an electrochemical or semiconductor gas sensor. The quantitative determination of perchloroethylene in air in the ppm-range is possible by applying mathematical procedures of pattern recognition. Finally, a comparative discussion of the different transducer and evaluation principles is given for specific applications.

Paper Details

Date Published: 9 March 1993
PDF: 11 pages
Proc. SPIE 1716, International Conference on Monitoring of Toxic Chemicals and Biomarkers, (9 March 1993); doi: 10.1117/12.140263
Show Author Affiliations
Klaus-Dieter Schierbaum, Univ. Tuebingen (Germany)
S. Vaihinger, Univ. Tuebingen (Germany)
M. Haug, Univ. Tuebingen (Germany)
Wolfgang Goepel, Univ. Tuebingen (Germany)

Published in SPIE Proceedings Vol. 1716:
International Conference on Monitoring of Toxic Chemicals and Biomarkers

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