期刊
CHEMOSPHERE
卷 58, 期 10, 页码 1365-1376出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2004.09.082
关键词
metals; particulate matter; fractionation; BCR sequential extraction capillary electrophoresis
The capillary electrophoresis (CE) method combined with a sequential extraction was applied to determine the distribution of Fe, Zn, Cu, Mn and Cd in urban ambient air PM2.5 samples. PM2.5 was collected on Teflon filters with dichotomous sampler, and the modified extraction procedure following the BCR leaching procedure was used to chemically fractionate metals into easily exchangeable with water, acid extractable with 0.11 mol/l acetic acid, reducible with 0.1 mol/l hydroxylamine hydrochloride acidified to pH 2.0 with nitric acid, and oxidisable with oxidation by 8.8 mol/l hydrogen peroxide (H2O2) followed by extraction with 1.0 mol/l ammonium acetate. Based on the obtained results it was concluded that the application of the studied methodology provides chemical fractionation data that reflect the general sources and potential health hazards of the studied metals. Crown Copyright (c) 2004 Published by Elsevier Ltd. All rights reserved.
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