Conference paper
Monitoring of ammonia in an aqueous environment using a supercontinuum-based photoacoustic sensing system
In
Proceedings of Spie
—
2019, Volume 10895, pp. 108950L-108950L-6
Abstract
We demonstrate a robust photoacoustic medium for measuring the concentration of ammonia in an aqueous solution. We target the near-infrared (NIR) overtone absorption band (1540 nm) of ammonia with a supercontinuum (SC) laser-based excitation system and an immersion-based acoustic transducer as the detection system.
We further present how such a simple system can be used to perform effective in-situ measurements of ammonia over a range of concentrations with a sensitivity of parts per million (ppm) by volume and linearity of >96%. We demonstrate how the sensing system can be readily tailored to monitor the concentrations of other miscible gases in the aqueous solution.
| Language: | English |
|---|---|
| Publisher: | SPIE - International Society for Optical Engineering |
| Year: | 2019 |
| Pages: | 108950L-108950L-6 |
| Proceedings: | Frontiers in Biological Detection |
| Series: | Proceedings of Spie - the International Society for Optical Engineering |
| ISBN: | 1510624325 , 1510624333 , 9781510624320 and 9781510624337 |
| ISSN: | 24109045 , 16057422 , 1996756x and 0277786x |
| Types: | Conference paper |
| DOI: | 10.1117/12.2510351 |
| ORCIDs: | Janting, Jakob , Markos, Christos and Bang, Ole |
