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POTENTIAL RELAXATION AS A MEASUREMENT PROCEDURE FOR BIOSENSORS
Klein, Karl-Dittmar
Klein, Karl-Dittmar
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Issue Date
1992
Submitted date
2024-05-08
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Abstract
We present a discontinuously working procedure for long-term measurement of the
concentration of an analyte in a solution with an enzyme electrode.
As compared with this method the well-known amperometric procedure works
continuously: The working electrode is permanently forced to a certain voltage, and
a current results, the magnitude of which is a measure of the concentration of the
analyte. The disadvantage may arise that the function of the working electrode can
be affected by products of interfering reactions and succeeding reactions (e.g.
polymerization). In in-vivo- application the permanently applied voltage at such
electrodes can also cause electrochemical conversion of physiological substances
into toxic ones and stimulate immune reactions leading to encapsulating of the
sensor.
The presented relaxation procedure uses the same biosensor arrangement as the
amperometric one. The respective voltages, however, are applied only for a short
time (about one second) and the interruptions are long (in the range of minutes).
Citation
Biosensors : fundamentals, technologies and applications, 333 - 336
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Type
Book chapter
conference paper
conference paper
Language
en
Description
Series/Report no.
GBF monographs ; Volume 17
ISSN
0930-4320
EISSN
ISBN
1560812206
3527284370
3527284370
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Attribution-NonCommercial-ShareAlike 4.0 International