Perchloroethylene detection in air: a comparative study using polymer sensor elements and catalyst/sensor systems

Klaus-Dieter Schierbaum; S. Vaihinger; M. Haug; Wolfgang Goepel

doi:10.1117/12.140263

9 March 1993 Perchloroethylene detection in air: a comparative study using polymer sensor elements and catalyst/sensor systems

Klaus-Dieter Schierbaum, S. Vaihinger, M. Haug, Wolfgang Goepel

Author Affiliations +

Proceedings Volume 1716, International Conference on Monitoring of Toxic Chemicals and Biomarkers; (1993) https://doi.org/10.1117/12.140263
Event: Environmental Sensing '92, 1992, Berlin, Germany

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.

Citation Download Citation

Klaus-Dieter Schierbaum, S. Vaihinger, M. Haug, and Wolfgang Goepel "Perchloroethylene detection in air: a comparative study using polymer sensor elements and catalyst/sensor systems", Proc. SPIE 1716, International Conference on Monitoring of Toxic Chemicals and Biomarkers, (9 March 1993); https://doi.org/10.1117/12.140263

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