PMID: 16646472May 2, 2006Paper

Development of a wet-chemical method for the speciation of iron in atmospheric aerosols

Environmental Science & Technology
Brian J MajesticConstantinos Sioutas

Abstract

The ability to quantify the chemical and physical forms of transition metals in atmospheric particulate matter (PM) is essential in determining potential human health and ecological effects. A method for the speciation of iron in atmospheric PM has been adapted which involves extraction in a well-defined solution followed by oxidation state specific detection. The method was applied to a suite of environmental aerosols. Ambient atmospheric aerosols in an urban area of St. Louis (the St. Louis-Midwest Supersite) were collected on Teflon substrates and were leached in one of four different solutions: (1) >18.0 Momega water; (2) 140 microM NaCl solution; (3) pH = 7.4 NaHCO3 solution; and (4) pH = 4.3 acetate buffering system. Fe(ll) was determined directly using the Ferrozine method as adapted to liquid waveguide spectrophotometry using a 1 m path-length cell. Fe(lll) was determined similarly after reduction to Fe(ll). It was found that, at low ionic strength, pH exerted a major influence on Fe(ll) solubility with the greatest Fe(ll) concentration consistently found in the pH = 4.3 acetate buffer. Soluble Fe(lll) (as defined by a 0.2 microm filter) varied little with extractant, which implies that most of the Fe(lll) detected was ...Continue Reading

References

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Citations

Feb 22, 2012·Journal of Microbiological Methods·Juliane BraunschweigRainer U Meckenstock
May 25, 2012·Environmental Science & Technology·M OakesR J Weber
Nov 7, 2012·Environmental Science & Technology·Sidhartha PattanaikGerald P Huffman
May 16, 2013·Journal of Exposure Science & Environmental Epidemiology·Ralph J DelfinoMartin M Shafer
Apr 30, 2016·The Science of the Total Environment·Sidhartha PattanaikGerald P Huffman
Oct 12, 2018·Environmental Geochemistry and Health·Suman YadavP Gursumeeran Satsangi
Dec 29, 2019·Neuropathology : Official Journal of the Japanese Society of Neuropathology·Motoko Niida-KawaguchiNoriyuki Shibata
Mar 8, 2019·The Science of the Total Environment·François BurgayCarlo Barbante
May 21, 2009·Environmental Science & Technology·Neeraj RastogiRodney J Weber
May 23, 2015·Environmental Science & Technology·Benton T CartledgeBrian J Majestic

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