A miniaturized carbon dioxide gas sensor based on sensing of pH-sensitive hydrogel swelling with a pressure sensor
A miniaturized carbon dioxide gas sensor based on sensing of pH-sensitive hydrogel swelling with a pressure sensor
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DOI：
10.1007/s10544-005-3026-5
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发表时间：
2005-09-01
影响因子：
2.8
通讯作者：
van den Berg, A
中科院分区：
文献类型：
--
作者：
Herber, S;Bomer, J;van den Berg, A
已经实现了一种二氧化碳检测的测量概念，其中用微压力传感器测量封闭的ph敏感水凝胶产生的二氧化碳诱导压力。该传感器的应用是量化胃内CO2分压（Pco(2)）作为胃肠道缺血的诊断。通过检测传感器对Pco(2)变化的响应来验证这一原理。此外，还确定了响应时间、温度灵敏度和分辨率。该传感器对Pco(2)的变化响应良好，在20 kPa CO2下产生的最大压力为0.29x 10(5) Pa。在37℃下，90%的响应时间在1.5到4.5分钟之间变化。传感器显示出线性温度灵敏度，可以很容易地补偿，并且可以检测到小至0.5 kPa CO2的Pco(2)变化。
A measurement concept has been realized for the detection of carbon dioxide, where the CO2 induced pressure generation by an enclosed pH-sensitive hydrogel is measured with a micro pressure sensor. The application of the sensor is the quantification of the partial pressure of CO2 (Pco(2)) in the stomach as diagnosis for gastrointestinal ischemia. The principle is put to the proof by examining the sensor response to changes in Pco(2). Furthermore, the response time, temperature-sensitivity and resolution are determined. The sensor responds well to changes in Pco(2) with a maximum pressure generation of 0.29x 10(5) Pa at 20 kPa CO2. The 90% response time varies between 1.5 and 4.5 minutes at 37 degrees C. The sensor shows a linear temperature-sensitivity which can easily be compensated for, and enables detection of Pco(2) changes as small as 0.5 kPa CO2.