期刊
TALANTA
卷 84, 期 3, 页码 918-923出版社
ELSEVIER
DOI: 10.1016/j.talanta.2011.02.032
关键词
Anions; Air quality; Particulate matter; Inhomogeneity; Ion chromatography
资金
- National Measurement System Chemical & Biological Metrology Programme
- NPL's operation and management of the UK Airborne Particulate Concentrations and Numbers Network
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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