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Assessment of the effect of degradation by atmospheric gaseous oxidants on measured annual average benzo[a]pyrene mass concentrations.

Brown, R J C; Brown, A S (2013) Assessment of the effect of degradation by atmospheric gaseous oxidants on measured annual average benzo[a]pyrene mass concentrations. Chemosphere, 90 (2). pp. 417-422.

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Abstract

A novel method for assessing the effect on measured annual average benzo[a]pyrene (B[a]P) concentrations of degradation by atmospheric species is presented. The method is based on assessing the difference in measured B[a]P mass concentrations using different sampling periods and extrapolating this relationship using assumed pseudo-first order reaction rate kinetics to produce the expected B[a]P mass concentration when a theoretical sampling periods of zero duration are used - during which no degradation would be observed. The results suggest that the use of a one day sampling period as specified by the required reference method for B[a]P assessment in Europe may result in an underestimation of the annual average B[a]P mass concentration by approximately 6 % - relatively small compared to the overall uncertainty of the measurement.

Item Type: Article
Subjects: Analytical Science
Analytical Science > Trace Analysis and Electrochemistry
Identification number/DOI: 10.1016/j. chemosphere.2012.07.044
Last Modified: 24 Jul 2018 10:32
URI: http://eprintspublications.npl.co.uk/id/eprint/5708

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