Principles and operation of a mobile photoacoustic NH3 monitor

Rudy A. Rooth; Adriaan J. L. Verhage; Leo W. Wouters

doi:10.1117/12.20341

1 August 1990 Principles and operation of a mobile photoacoustic NH₃ monitor

Rudy A. Rooth, Adriaan J. L. Verhage, Leo W. Wouters

Proceedings Volume 1269, Environment and Pollution Measurement Sensors and Systems; (1990) https://doi.org/10.1117/12.20341
Event: The International Congress on Optical Science and Engineering, 1990, The Hague, Netherlands

Abstract

In the environmental problem of acidification, deposition of atmospheric ammonia is an important factor in NW Europe. Background concentrations are generally low but variations due to local sources may be large and rapid, so a sensitive measuring instrument with a high dynamic range and good time resolution is required. A photoacoustic ammonia measurement system with a detection limit for NH3 of about 1 ppbv and a time resolution of about 5 minutes is described. The results of 'a measurement campaign in the field during the spring of 1989, with the instrument installed in a caravan, will be reported. Concentrations were determined at a single position above the ground (2 m.). The instrument has since then been adapted to measurements at four different heights from which vertical fluxes can be derived. The encouraging first results will be presented.

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Rudy A. Rooth, Adriaan J. L. Verhage, and Leo W. Wouters "Principles and operation of a mobile photoacoustic NH₃ monitor", Proc. SPIE 1269, Environment and Pollution Measurement Sensors and Systems, (1 August 1990); https://doi.org/10.1117/12.20341

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