Identification of Unknown Substances in Ambient Air (PM₁₀), Profiles and Differences between Rural, Urban and Industrial Areas.

ABSTRACT: A fast and automated strategy has been developed for identifying unknown substances in the atmosphere (concretely, in the particulate matter, PM₁₀) using LC-HRMS (MS³). A total of 15 samples were collected in three different areas (rural, urban and industrial). A sampling flow rate of 30 m³ h^-1 was applied for 24 h, sampling a total volume of around 720 m³. A total of 49 compounds were tentatively identified using very restrictive criteria regarding exact mass, retention time, isotopic profile and both MS² and MS³ spectra. Pesticides, pharmaceutical active compounds, drugs, plasticizers and metabolites were the most identified compounds. To verify whether the developed methodology was suitable, 11 substances were

SUBMITTER: Lopez A 

PROVIDER: S-EPMC9145881 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature