Articles | Volume 10, issue 8
Research article
08 Aug 2017
Research article |  | 08 Aug 2017

A method for measuring total aerosol oxidative potential (OP) with the dithiothreitol (DTT) assay and comparisons between an urban and roadside site of water-soluble and total OP

Dong Gao, Ting Fang, Vishal Verma, Linghan Zeng, and Rodney J. Weber


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Short summary
This work compares three methods to determine the optimal approach for quantifying the total oxidative potential (OP) of fine particles collected with filters using the dithiothreitol (DTT) assay. An automated system has been developed to facilitate the total OP measurements for use in generation of large data sets needed for epidemiology studies. The results from this study show that the water-insoluble components contribute to PM2.5 OP and the related DTT-active species are largely secondary.