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A miniature Clark-type oxygen electrode using a polyelectrolyte and its application as a glucose sensor

✍ Scribed by Hiroaki Suzuki; Akio Sugama; Naomi Kojima; Fumio Takei; Kasumi Ikegami

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
583 KB
Volume
6
Category
Article
ISSN
0956-5663

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✦ Synopsis

A miniature Clark-type oxygen electrode was fabricated by anisotropically etching silicon. A two-gold-electrode configuration was used and a double-layered gas-permeable membrane was formed directly on the electrolyte, poly(vinyl-4-ethylpyridinium bromide) in the sensitive area. These materials improved the electrode's stability in long-term storage and sterilization tolerance to a practical level. The 90% response time averaged 80 s and residual current 10%, with a good linear calibration curve. The oxygen electrode was also used to make an integrated sensor for the simultaneous determination of glucose and oxygen. The glucose sensor's response time was 50-110 s, with good linearity in glucose concentrations between 56 microM and 1.1 mM at 37 degrees C, pH 7.0.

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