Selective polymer materials: absolute determination of their sorption properties

Michael Jakusch; Boris Mizaikoff

doi:10.1117/12.417436

26 February 2001 Selective polymer materials: absolute determination of their sorption properties

Michael Jakusch, Boris Mizaikoff

Proceedings Volume 4205, Advanced Environmental and Chemical Sensing Technology; (2001) https://doi.org/10.1117/12.417436
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

Abstract

Several types of selective materials are frequently used in chemical sensors such as natural antibodies, synthetic host substances (calixarenes, cyclodextrines, etc.) molecularly imprinted materials, or conventional polymers. For a systematic development of those materials, their sorption behavior for interesting analyte substances and potentially interfering compounds has to be thoroughly characterized, which can be a time-consuming and error-prone task. Moreover, using the respective sensor principle itself for this characterization an exact relation between the sensor signal and the underlying partition coeÆcient or sorption isotherm can often not be obtained. In this paper, we present an automated method for the direct determination of polymer/water partition coeÆcients of volatile organic compounds that consists of an automated uid handling system, a dedicated partitioning cell and a purge-and-trap gas chromatography (PT-GC) unit. The main application of this novel system is the characterization of layer materials for infrared evanescent wave spectroscopic (IR-EWS) sensors, however an extension to other problems is conceivable. The whole experimental procedure comprising calibration of the GC system, preparation of test solutions, analyte partitioning, sample analysis, as well as the necessary cleaning steps is performed automatically under computer control. Hence, this system can be operated unattendedly, yielding a reasonable throughput with comparatively low expenditure of human labor.

Citation Download Citation

Michael Jakusch and Boris Mizaikoff "Selective polymer materials: absolute determination of their sorption properties", Proc. SPIE 4205, Advanced Environmental and Chemical Sensing Technology, (26 February 2001); https://doi.org/10.1117/12.417436

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