Microchip-type oxygen gas sensor based on differential potentiometry
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United States of America Patent
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Dec 16, 2003
Grant Date -
Jun 13, 2002
app pub date -
Oct 18, 2001
filing date -
Oct 19, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a microchip-based differential-type potentiometric oxygen gas sensor, which comprises a working electrode and a reference electrode. The working electrode is composed of a cobalt-plated electrode, a buffered hydrogel, and an ion sensitive gas permeable membrane while the reference electrode is composed of an oxygen non-sensitive silver chloride electrode and the same ion-selective gas-permeable membrane of working electrode. By taking advantage of the corrosion potential, the microchip-based oxygen gas sensor can accurately and quickly detect the content of dissolved oxygen in a sample solution. With this structure, the oxygen gas sensor is applied to a microchip-based all potentiometric multi-sensor capable of detecting two or more ions and gas species on a single chip.
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