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CE-MS: A useful tool for the identification of water-soluble polar organics in air and vehicular emitted particulate matter

  1. Mahmoud M. Yassine1,
  2. Ewa Dabek-Zlotorzynska1,*,
  3. Philippe Schmitt-Kopplin2

Article first published online: 6 APR 2009

DOI: 10.1002/elps.200800628

Issue

ELECTROPHORESIS

ELECTROPHORESIS

Special Issue: CE-MS

Volume 30, Issue 10, pages 1756–1765, May 2009

Additional Information

How to Cite

Yassine, M. M., Dabek-Zlotorzynska, E. and Schmitt-Kopplin, P. (2009), CE-MS: A useful tool for the identification of water-soluble polar organics in air and vehicular emitted particulate matter. ELECTROPHORESIS, 30: 1756–1765. doi: 10.1002/elps.200800628

Author Information

  1. 1

    Analysis and Air Quality Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Environment Canada, Ottawa, Ont., Canada

  2. 2

    Helmholtz-Zentrum Muenchen-German Research Center for Environmental Health, Institute for Ecological Chemistry, Neuherberg, Germany

*Analysis and Air Quality Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Environment Canada, 335 River Road, Ottawa, Ont. K1A 0H3, Canada Fax: +1-613-990-8568

Publication History

  1. Issue published online: 13 MAY 2009
  2. Article first published online: 6 APR 2009
  3. Manuscript Accepted: 10 NOV 2008
  4. Manuscript Revised: 5 NOV 2008
  5. Manuscript Received: 24 SEP 2008

Funded by

  • Canadian Federal Program on Energy Research and Development

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Keywords:

  • Aromatic acids;
  • Atmospheric aerosols;
  • CE-MS;
  • Fourier transform ion cyclotron resonance MS;
  • Vehicular emission

Abstract

A CE-ESI/quadrupole-MS method using an ammonium acetate-based BGE (pH 4.7) was developed for the determination of isomeric benzoic acids in atmospheric aerosols and vehicular emission. UltraTrol™ LN was employed as the pre-coating polymer to suppress the EOF (0.3×10−9 m2 V−1 s−1) and achieve a baseline separation of the studied acids. Good repeatability for migration time (RSD<1%, N=10) was obtained without coating regeneration. The high pre-coating stability allowed coupling of CE to MS without ion suppression in the MS. In scanning mode and using field-amplified sample injection with electrokinetic injection (−5 kV for 60 s), LODs (S/N=3) ranged from 2.5 to 6 μg/L for standard target analytes prepared in DI water. In the presence of 100 mg/L of sulfate (added to simulate a sample matrix), LODs ranged from 8 to 90 μg/L. Several isomeric aromatic acids could be separated in atmospheric and diesel-engine-emitted particulate matter extracts based on their different acidities. Additional measurements with a flow infusion ESI Fourier transform ion cyclotron resonance MS were used for further structural information acquisition on the unknown compounds and allowed their formula to be proposed.

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