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A System for Measuring Vertical Concentration Profiles of Gaseous Pollutants,Using Carbon Dioxide as a Case Study
Authors:Alfred Micallef  Chris N. Deuchar  Jeremy J. Colls
Affiliation:1. University of Nottingham, United Kingdomalfred@phys.um.edu.mt;3. University of Nottingham, United Kingdom
Abstract:An electronically-controlled sampling system, characterised by its organ pipe design, has been developed for sampling air sequentially, at different heights within the breathing zone. Data are automatically logged at the different receptor levels, for the determination of the average vertical concentration profile of gaseous pollutants. The system has been coupled to a carbon dioxide monitor and used in a brief study of the spatial and temporal variation of indoor carbon dioxide concentration. The system can easily be extended for different heights or modified for use with other types of gas monitor. The results of a trial run, which was carried out in a coffee room, are presented and applications of the Organ Pipe Sequential Sampling (OPSS) system are discussed.
Keywords:concentration gradients  spatial distribution  multi-level sampling  human exposure  indoor-outdoor air pollution
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