Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
745112 | Sensors and Actuators B: Chemical | 2006 | 6 Pages |
Abstract
The measurement of urea was accomplished with an interdigitated electrode by using ac impedance spectroscopy to follow capacitance changes, which were produced during enzyme-catalyzed dissolution of a polymer coating. The employed coating was the enteric polymer Eudragit S-100, on which urease enzyme was immobilized by carbodiimide coupling. Urea was determined in the 0.02–2 M range, proving that the combination of the biofunctionalized electrode and the impedance technique results in an elegant approach for urea biosensing.
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Authors
M. Cortina, M.J. Esplandiu, S. Alegret, M. del Valle,