| abstract |
The present invention is a sensor for detecting urea using a separating-style structure of ion-selective electrode, in which an ammonium ion-selective membrane is immobilized on a conductive layer on the surface of a substrate, said conductive layer has a sensing region and a non-sensing region after packaged, and a conductive line is used to retrieve a sensing signal from said conductive layer. In the end, employing the enzyme immobilization method to immobilize a urea enzyme onto ammonium ion-selective membrane, thus the fabrication of a potentiometric urea sensor is completed. |