1. A feasibility study of the use of reactive tracers to determine outdoor daytime OH radical concentrations within the urban environmentIain R. White, Damien Martin, K Fredrik Petersson, Stephen J Henshaw, Graham Nickless, Guy C Lloyd-Jones, Kevin C Clemitshaw, Dudley E Shallcross, 2014, original scientific article Abstract: Using a specifically designed chemical tracer to indirectly measure local atmospheric hydroxyl radical (OH) concentrations is a very appealing concept. Such a tracer will provide information on the amount of OH a tracer encounters, as it moves through the urban environment and provide a stringent test of models. However, to date an outdoor experiment such as this has not been conducted. This article discusses the reasons why this is so and examines the feasibility of using tracers to measure integrated urban OH levels over short (≤1km) distances.
Keywords: reactive tracers, OH radicals, NO3 radicals, oxidising rate, dispersion, urban
Published in RUNG: 18.07.2019; Views: 3018; Downloads: 0
This document has many files! More... |
2. Use of reactive tracers to determine ambient OH radical concentrations: Application within the indoor environmentIain R. White, Damien Martin, Maria Paz Muñoz, Fredrik K Petersson, Stephen J Henshaw, Graham Nickless, Guy C Lloyd-Jones, Keven C Clemitshaw, Dudley E. Shallcross, 2010, original scientific article Abstract: 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.
Keywords: Ozone, Indoor air pollution, Indoor ozone, chemical tracers
Published in RUNG: 18.07.2019; Views: 2989; Downloads: 0
This document has many files! More... |
