edoc

Direct target and non-target analysis of urban aerosol sample extracts using atmospheric pressure photoionisation high-resolution mass spectrometry

Giorio, Chiara and Bortolini, Claudio and Kourtchev, Ivan and Tapparo, Andrea and Bogialli, Sara and Kalberer, Markus. (2019) Direct target and non-target analysis of urban aerosol sample extracts using atmospheric pressure photoionisation high-resolution mass spectrometry. CHEMOSPHERE, 224. pp. 786-795.

Full text not available from this repository.

Official URL: https://edoc.unibas.ch/74516/

Downloads: Statistics Overview

Abstract

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous atmospheric pollutants of high concern for public health. In the atmosphere they undergo oxidation, mainly through reactions with center dot OH and NOx to produce nitro- and oxygenated (oxy-) derivatives. In this study, we developed a new method for the detection of particle-bound PAHs, nitro-PAHs and oxy-PAHs using direct infusion into an atmospheric pressure photoionisation high-resolution mass spectrometer (APPI-HRMS). Method optimisation was done by testing different source temperatures, gas flow rates, mobile phases and dopants. Samples were extracted with methanol, concentrated by evaporation and directly infused in the APPI source after adding toluene as dopant. Acquisition was performed in both polarity modes. The method was applied to target analysis of seasonal PM2.5 samples from an urban background site in Padua (Italy), in the Po Valley, in which a series of PAHs, nitro- and oxy-PAHs were detected. APPI-HRMS was then used for non-target analysis of seasonal PM2.5 samples and results compared with nano-electrospray ionisation (nanoESI) HRMS. The results showed that, when samples were characterised by highly oxidised organic compounds, including S-containing compounds, like in summer samples, APPI did not bring any additional information with respect to nanoESI in negative polarity (nanoESI(-)). Conversely, for winter samples, APPI(-) could detect a series of aromatic and poly-aromatic compounds, mainly oxidised and nitrogenated aromatics, that were not otherwise detected with nanoESI. (C) 2019 Elsevier Ltd. All rights reserved.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Atmospheric Sciences (Kalberer)
UniBasel Contributors:Kalberer, Markus
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:PERGAMON-ELSEVIER SCIENCE LTD
ISSN:0045-6535
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:13 Apr 2020 13:29
Deposited On:13 Apr 2020 13:29

Repository Staff Only: item control page