A method of reducing oxygen induced drift in iridium oxide pH sensors

Hendrikse, J. and Olthuis, W. and Bergveld, P. (1998) A method of reducing oxygen induced drift in iridium oxide pH sensors. Sensors and Actuators B: Chemical, 53 (1-2). pp. 97-103. ISSN 0925-4005

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Abstract:	A novel way of reducing drift problems of the electrode potential of metal oxide pH sensors is presented. The method employs a FET-structure that uses the conducting metal oxide electrode as a gate contact. From the threshold voltage of this structure a signal can be derived which is independent of the electrode potential and can be used to compensate for the drift of it. In addition to the reduced drift, the compensation leads to an almost ideal nernstian response. First a theoretical explanation is given, which is then confirmed by measurement results.
Item Type:	Article
Copyright:	© 1998 Elsevier
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Biomedical and Environmental Sensor systems (BIOS)
Link to this item:	http://purl.utwente.nl/publications/73939
Official URL:	http://dx.doi.org/10.1016/S0925-4005(98)00298-6
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