Sensitivity of PM₁₀ oxidative potential to aerosol chemical composition at a Mediterranean urban site: ascorbic acid versus dithiothreitol measurements.

ABSTRACT: The oxidative potential (OP) of PM₁₀ daily samples collected at a traffic site in southeastern Spain during summer and winter was assessed by two acellular assays: the ascorbic acid (AA) and dithiothreitol (DTT) methods. Although PM₁₀ levels were similar during both periods, OP values (expressed in nmol min^-1 m^-3) showed a defined seasonal trend. The AA activity was higher in summer than in winter, whereas the DTT reactivity exhibited an opposite seasonal pattern. Both assays were sensitive to different PM₁₀ components, as shown by the results of the linear correlation analysis. Moreover, the relationship between OP values and PM₁₀ chemical species was not the same during summer and winter, indicating that particle toxicity

SUBMITTER: Clemente A 

PROVIDER: S-EPMC10009354 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature