Exploitation of a pH-sensitive hydrogel disk for CO2 detection

SENSORS AND ACTUATORS B-CHEMICAL

卷:103

Article; Proceedings Paper

Herber, S ; Olthuis, W ; Bergveld, P ; van den Berg, A

关键词: hydrogel;    pH-sensitive;    stimulus-sensitive;    P-CO2 sensor;    Severinghaus;   

DOI  :  10.1016/j.snb.2004.04.113

来源: Elsevier

【 摘 要 】

In this paper is described how hydrogel is exploited as sensor material for the detection of carbon dioxide (CO2). A pH-sensitive hydrogel disk, which swells and deswells in response to pH changes, was clamped between a pressure sensor membrane and a porous metal screen together with a bicarbonate solution. CO2 reacts with the bicarbonate solution resulting in a pH change, which is converted into a pressure by the enclosed hydrogel. This pressure is a measure for the partial pressure of CO2. The main advantage of this sensor principle is the fact that a reference electrode as required for potentiometric sensors is no longer needed. (C) 2004 Elsevier B.V. All rights reserved.

【 授权许可】

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