S. J. Henshaw

Use of Reactive Tracers To Determine Ambient OH Radical Concentrations: Application within the Indoor Environment

The hydroxyl radical (OH) plays a key role in determining indoor air quality. However, its highly reactive nature and low concentration indoors impede direct analysis. This paper describes the techniques used to indirectly quantify indoor OH, including the development of a new method based on the instantaneous release of chemical tracers into the air. This method was used to detect ambient OH in two indoor seminar rooms following tracer detection by gas chromatography-mass spectrometry (GCMS). The results from these tests add to the small number of experiments that have measured indoor OH which are discussed with regard to future directions within air quality research.

CityFlux perfluorocarbon tracer experiments

CityFlux perfluorocarbon tracer experiments F. K. Petersson, D. Martin, I. R. White, S. J. Henshaw, G. Nickless, I. Longley, C. J. Percival, M. Gallagher, and D. E. Shallcross School of Chemistry, University of Bristol, Bristol, UK SEAS, University of Manchester, Manchester, UK now at: Ionicon Analytik Gesellschaft m.b.H., Innsbruck, Austria now at: National Institute of Water and Atmospheric Research, New Zealand Received: 30 September 2009 – Accepted: 3 December 2009 – Published: 5 January 2010 Correspondence to: D. E. Shallcross (d.e.shallcross@bristol.ac.uk) Published by Copernicus Publications on behalf of the European Geosciences Union.