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Yassine, M.M.* ; Dabek-Zlotorzynska, E.* ; Schmitt-Kopplin, P.

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

Electrophoresis 30, (Sp. Iss. SI), 1756-1765 (2009)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
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 (TM) LN was employed as the pre-coating polymer to suppress the EOF (0.3 x 10(-9) m(2) 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 mu g/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 mu g/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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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Aromatic acids; Atmospheric aerosols; CE-MS; Fourier transform ion cyclotron resonance MS; Vehicular emission; capillary electrophoresis/mass spectrometry; ionization mass-spectrometry; amplified sample injection; carboxylic-acids; atmospheric particles; dynamic coatings; molecular-level; aerosols; products; precision
ISSN (print) / ISBN 0173-0835
e-ISSN 1522-2683
Journal Electrophoresis
Quellenangaben Volume: 30, Issue: 10, Pages: 1756-1765, Article Number: , Supplement: (Sp. Iss. SI)
Publisher Wiley
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Ecological Chemistry (IOEC)