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

Chemosensors

Ewa Jaworska²  Krzysztof Maksymiuk²  Agata Michalska¹ 

[1] Department of Chemistry, Warsaw University, Pasteura 1, Warsaw 02-093, Poland;

关键词: urea;    potentiometry;    disposable sensor;    carbon nanotube;    ion-selective electrode;   

DOI  :  10.3390/chemosensors3030200

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.