@inproceedings{eeb393fb1ed1400fb9c31e70917dd2a9,
title = "Monitoring of ammonia in an aqueous environment using a supercontinuum-based photoacoustic sensing system",
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.",
author = "Dasa, {Manoj Kumar} and Adamu, {Abubakar Isa} and Jakob Janting and Kyei Kwarkye and Christos Markos and Ole Bang",
year = "2019",
doi = "10.1117/12.2510351",
language = "English",
volume = "10895",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE - International Society for Optical Engineering",
booktitle = "Proceedings of SPIE",
note = "SPIE Photonics West BiOS 2019 ; Conference date: 02-02-2019 Through 07-02-2019",
}