Use of X-ray absorption spectroscopy to speciate manganese in airborne particulate matter from five counties across the United States.

ABSTRACT: The purpose of this study is to characterize manganese oxidation states and speciation in airborne particulate matter (PM) and describe how these potentially important determinants of PM toxicity vary by location. Ambient PM samples were collected from five counties across the US using a high volume sequential cyclone system that collects PM in dry bulk form segregated into "coarse" and "fine" size fractions. The fine fraction was analyzed for this study. Analyses included total Mn using ICP-MS and characterization of oxidation states and speciation using X-ray absorption spectroscopy (XAS). XAS spectra of all samples and ten standard compounds of Mn were obtained at the National Synchrotron Light Source. XAS data was analyzed using Linear Combination Fitting (LCF). Results of the LCF anal

SUBMITTER: Datta S 

PROVIDER: S-EPMC3351832 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature