A Miniaturized Carbon Dioxide Gas Sensor Based on Sensing of pH-Sensitive Hydrogel Swelling with a Pressure Sensor
| Autor: | Piet Bergveld, S. Herber, A. van den Berg, Wouter Olthuis, Johan G. Bomer |
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| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Biomedical Engineering Analytical chemistry Pco2 chemistry.chemical_compound Osmotic Pressure Transducers Pressure Miniaturization Pressure Osmotic pressure Molecular Biology Sensor Response time Hydrogels pH-sensitive Equipment Design Partial pressure Hydrogen-Ion Concentration Pressure sensor respiratory tract diseases Equipment Failure Analysis Microelectrode Hydrogel chemistry Carbon dioxide Self-healing hydrogels Biological Assay CO2 Microelectrodes Ion-Selective Electrodes Biomedical engineering |
| Zdroj: | Biomedical microdevices, 7(3), 197-204. Kluwer Academic Publishers |
| ISSN: | 1387-2176 |
| DOI: | 10.1007/s10544-005-3026-5 |
| Popis: | A measurement concept has been realized for the detection of carbon dioxide, where the CO(2) 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 CO(2) (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 0.29 x 10(5) Pa at 20 kPa CO(2). The 90% response time varies between 1.5 and 4.5 minutes at 37( composite function)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 CO(2). |
| Databáze: | OpenAIRE |
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