P1AP.7 - Developing Low Concentration Acetic Acid Sensors for the Museum Sector
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-1 - Applications of Chemical Sensors
- S. Hunt, D. Mannion, J. Grau-Bove, S. Gaisford - University College London, Gower St, Bloomsbury, London (United Kingdom)
- 448 - 449
There is a demand for affordable acetic acid sensors for the heritage sector, capable of detecting parts per billion concentrations (ppb), to enable wide spread museum monitoring of this compound. This paper demonstrates the potential for lead oxide coated quartz crystal microbalances (QCMs) to sense such concentrations of acetic acid. The prototype QCM sensor unit recorded a gradual increase in mass over time in the presence of ~216 ppb of this species, due to the formation of lead acetates. Furthermore, as the sensor response to changes in relative humidity produced a step change in mass, the sensor response to acetic acid should be separable from that caused by water vapour fluctuations.