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Concentrations and Solubility of Metals from Indoor and Personal Exposure PM2.5 Samples

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Abstract:An assessment of trace metal quantification capabilities for indoor (123 ± 53 μg; mean ± standard deviation of particle mass) and personal exposure (32 ± 12 μg) PM2.5 samples from Baltimore, MD was undertaken as part of an EPA study investigating health effects associated with particulate matter. This study included determination of total PM2.5 metal concentrations by energy dispersive x-ray fluorescence (XRF), instrumental neutron activation analysis (INAA), and method development to quantify amounts of water and acid extractable metals from PM2.5 using inductively coupled plasma-mass spectrometry (ICP-MS). Analytical uncertainties, filter blank contributions, and sample preparation were all found to significantly impact quantification limits. The ICP-MS leaching procedure resulted in partial extraction of metals from the PM2.5. Most of the extractable component of the metals was in a water-soluble form suggesting a high potential for bioavailability of elements from respiratory exposure to PM2.5. A comparison of PM2.5 trace metal concentrations from indoor air samples collected from a central indoor site versus concurrently collected personal exposure samples indicates that resident activities result in exposure to higher concentrations of soluble trace metals.

This work as been funded wholly or in part by the U.S. Environmental Protection Agency Office of Research and Development. It has been subjected to Agency Review and approved for publication. Mention of trade names or commercial products does not constitute an endorsement or recommendation for use.
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Citation:Graney, J. R., M. S. Landis, and G. A. Norris. Concentrations and Solubility of Metals from Indoor and Personal Exposure PM2.5 Samples. ATMOSPHERIC ENVIRONMENT 38(2):237-247, (2004).
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Environmental Characterization & Apportionment Branch
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Product Type: Journal
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Published: 01/01/2004
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Bullet Item Concentrations and Solubility of Metals from Indoor and Personal Exposure PM2.5 Samples
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Related Entries:
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Bullet Item Atmospheric Mercury Research
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