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Diffusion coefficients of oxygen, hydrogen peroxide and glucose in a hydrogel

✍ Scribed by S.A.M. van Stroe-Biezen; F.M. Everaerts; L.J.J. Janssen; R.A. Tacken

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
620 KB
Volume
273
Category
Article
ISSN
0003-2670

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✦ Synopsis

For the design of a new glucose sensor, a knowledge of the diffusion of all partlclpatmg compounds IS needed A rotating disc electrode covered unth hydrogel layer was used to determme the effectlve dlftislon coefficients (Den) of oxygen, hydrogen peronde and hydroqumone m a hydrogel, which IS used m the sensor Measurements were camed out under steady-state condltlons The three compounds appeared to be slowed by the gel to the same extent A comparison was made between the Den values of glucose and hydroqumone by simultaneous dlffuslon through a hydrogel membrane In this case glucose dlffuslon was slowed to a larger extent than hydroqumone diffusion The effect, however, was independent of the degree of cross-hnkmg of the hydrogel

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