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Volume 11, Pages 242-252
Research Article

Uncertainty-Weighted Time Averaging of Mercury Vapour Concentrations in Ambient Air: Application to Measurements in the United Kingdom

Analytical Science Division, National Physical Laboratory, Teddington, Middlesex, UK

Received 6 September 2010; Revised 20 December 2010; Accepted 6 January 2011

Academic Editor: Ki-Hyun Kim

Copyright © 2011 Richard J. C. Brown and Dharsheni Muhunthan.


Uncertainty-weighted time averaging of total gaseous mercury concentrations in ambient air, with associated robust uncertainties, has been performed for concentrations measured by the U.K. Heavy Metals Monitoring Network between 2007 and 2009. The results have been compared with averages produced using standard time-averaging methods with a view to investigating the properties of the new method and whether it represents an improvement over current practice.