Journal
TALANTA
Volume 84, Issue 3, Pages 918-923Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2011.02.032
Keywords
Anions; Air quality; Particulate matter; Inhomogeneity; Ion chromatography
Categories
Funding
- National Measurement System Chemical & Biological Metrology Programme
- NPL's operation and management of the UK Airborne Particulate Concentrations and Numbers Network
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The spatial inhomogeneity of anions in ambient particulate matter collected on filters has been investigated using two different sub-sampling techniques and with analysis by a drift-corrected ion chromatography technique. The results highlight the inhomogeneity in anion mass along the radius of the sampled filter, in agreement with analogous studies on metals in PM, and also, more surprisingly, significant random differences between sub-samples based on filter sectors. Implications for the sub-sampling of filters for the purposes of performing multiple analyses are discussed. (C) 2011 Elsevier B.V. All rights reserved.
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