Articles | Volume 16, issue 6
Atmos. Chem. Phys., 16, 3865–3879, 2016
https://doi.org/10.5194/acp-16-3865-2016
Atmos. Chem. Phys., 16, 3865–3879, 2016
https://doi.org/10.5194/acp-16-3865-2016

Research article 23 Mar 2016

Research article | 23 Mar 2016

Oxidative potential of ambient water-soluble PM2.5 in the southeastern United States: contrasts in sources and health associations between ascorbic acid (AA) and dithiothreitol (DTT) assays

Ting Fang et al.

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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Ting Fang on behalf of the Authors (26 Feb 2016)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (29 Feb 2016) by Yinon Rudich
RR by Anonymous Referee #1 (07 Mar 2016)
ED: Publish as is (13 Mar 2016) by Yinon Rudich
AR by Ting Fang on behalf of the Authors (15 Mar 2016)  Author's response    Manuscript
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Short summary
Ascorbic acid (AA) and Dithiothreitol (DTT) assay measures of water-soluble PM2.5 oxidative potential (OP) are compared in terms of spatiotemporal trends, chemical selectivity, sources, and health impacts based on an epidemiological study with backcast estimated OP. Both assays point to metals from brake/tire wear, but only the DTT assay also identifies organics from combustion. DTT is associated with emergency department visits for asthma/wheeze and congestive heart failure, whereas AA is not.
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