A Piezoelectric Sensor for Dissolved Careon Dioxide
- 1 August 1976
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 9 (8), 751-765
- https://doi.org/10.1080/00032717608059139
Abstract
Piezoelectric crystals undergo a change in vibrational frequency proportional to a change in their mass. A sensor based on this microweighing principle was investigated for use in continuous monitoring of dissolved CO2. The crystal coated with a primary amine was sealed into a compartment covered with a gas permeable membrane. A probe utilizing a didodecylamine coated crystal and a microporous Teflon filter membrane measured dissolved carbon dioxide in aqueous samples. A differential mode of measurement with a reference probe referred to water vapor was used to compensate for water vapor interference.Keywords
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