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Gas chromatography/mass spectrometry of polychlorinated biphenyls using atmospheric pressure chemical ionization and atmospheric pressure photoionization microchips
Author(s) -
Luosujärvi Laura,
Karikko MikaMatti,
Haapala Markus,
Saarela Ville,
Huhtala Sami,
Franssila Sami,
Kostiainen Risto,
Kotiaho Tapio,
Kauppila Tiina J.
Publication year - 2008
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.3379
Subject(s) - chemistry , atmospheric pressure chemical ionization , chromatography , mass spectrometry , photoionization , analytical chemistry (journal) , gas chromatography , detection limit , chemical ionization , repeatability , atmospheric pressure , electron ionization , ionization , ion , organic chemistry , oceanography , geology
Gas chromatography (GC) and ion trap mass spectrometry (MS) were combined with microchip atmospheric pressure chemical ionization (µAPCI) and microchip atmospheric pressure photoionization (µAPPI) sources. Selected polychlorinated biphenyls (PCBs, IUPAC Nos. 28, 52, 101, 118, 138, 153 and 180) were analyzed by GC/µAPCI‐MS and GC/µAPPI‐MS to demonstrate the applicability of the miniaturized ion sources in negative ion mode analysis. The µAPCI and µAPPI methods were evaluated in respect of detection limit, linearity and repeatability. The detection limits for the PCB congeners were somewhat lower with µAPCI than with µAPPI, whereas µAPPI showed slightly wider linear range and better repeatability. With both methods, the best results were obtained for highly chlorinated or non‐ortho‐chlorinated PCBs, which possess the highest electron affinities. Finally, the suitability of the GC/µAPPI‐MS method for the analysis of PCBs in environmental samples was demonstrated by analyzing soil extracts, and by comparing the results with those obtained by gas chromatography with electron capture detection (GC/ECD). Copyright © 2008 John Wiley & Sons, Ltd.