Abstract
A method has been developed for determination of polycyclic aromatic hydrocarbons (PAH) in particulate matter from ambient air and diesel exhaust emissions. It is reproducible and accurate and, compared with similar methods for analysis of individual PAH components in complex matrices, it is relatively fast and simple. Single PAH components can be determined in samples of particulate matter from ambient air and diesel exhaust emissions with LOD of approximately 1 pg/sample. Further, sample throughput is high, because more than 20 samples can be extracted and prepared for analysis in one working (8-h) day. The particulate matter is subjected to ultrasound-assisted extraction, a technique that is shown to extract PAH from particulate material with efficiencies fully comparable with those of Soxhlet extraction. An aliphatic/PAH-enriched fraction is obtained by solid-phase extraction before isolation, separation, and identification/quantification of PAH by on-line liquid chromatography–gas chromatography–mass spectrometry. The method was validated by analysis of US National Institute of Standards and Technology (NIST) Standard Reference Materials (SRM) 1649a, Urban Dust, and 2975, Diesel Particulate Matter. Results from the method are in good agreement with the NIST-certified PAH concentrations and with NIST reference PAH concentrations.
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Acknowledgements
The authors gratefully acknowledge Lena Elfver’s laboratory assistance. This study was financed by the EU project Characterization of exhaust particulate emissions from road vehicles “Particulates” (2000-RD.11091), VINNOVA, the Swedish Agency for Innovation Systems, Sweden and the Swedish Energy Administration, Sweden.
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Christensen, A., Östman, C. & Westerholm, R. Ultrasound-assisted extraction and on-line LC–GC–MS for determination of polycyclic aromatic hydrocarbons (PAH) in urban dust and diesel particulate matter. Anal Bioanal Chem 381, 1206–1216 (2005). https://doi.org/10.1007/s00216-005-3065-z
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DOI: https://doi.org/10.1007/s00216-005-3065-z