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Chemosensors 2015, 3(3), 200-210; doi:10.3390/chemosensors3030200

Carbon Nanotubes-Based Potentiometric Bio-Sensors for Determination of Urea

Department of Chemistry, Warsaw University, Pasteura 1, Warsaw 02-093, Poland
Author to whom correspondence should be addressed.
Academic Editor: Johan Bobacka
Received: 28 April 2015 / Revised: 23 June 2015 / Accepted: 15 July 2015 / Published: 24 July 2015
(This article belongs to the Special Issue Ionophore-Based Potentiometric Sensors)
View Full-Text   |   Download PDF [381 KB, uploaded 24 July 2015]   |  


The possibility of using disposable plastic-carbon potentiometric sensors as enzyme biosensors was examined. Urease enzyme was immobilized on poly(vinyl chloride) based H+- or NH4+-selective membranes using cellulose acetate. This approach has resulted in a potentiometric response on changing the pH of the solution or NH4+ ion content due to an enzymatic reaction that occurs between urease and urea. Both types of potentiometric biosensors for urea were characterized by good analytical parameters as high sensitivity and fast response time. View Full-Text
Keywords: urea; potentiometry; disposable sensor; carbon nanotube; ion-selective electrode urea; potentiometry; disposable sensor; carbon nanotube; ion-selective electrode

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jaworska, E.; Maksymiuk, K.; Michalska, A. Carbon Nanotubes-Based Potentiometric Bio-Sensors for Determination of Urea. Chemosensors 2015, 3, 200-210.

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