Mass spectrometry analysis of polychlorinated biphenyls: Chemical ionization and selected ion chemical ionization using methane as a reagent gas
Article (Published version)
Metadata
Show full item recordAbstract
In the present paper a quadrupole ion trap mass spectrometer, coupled with a gas chromatograph, was used to compare the electron impact ionization (El) and chemical ionization (Cl) technique, in terms of their selectivity in polychlorinated biphenyls (PCBs) quantitative analysis. The experiments were carried out with a modified Varian SATURN III quadrupole ion-storage mass spectrometer equipped with Varian waveform generator, coupled with a gas chromatograph with DB-5 capillary column. The disadvantage of using El in the analysis of PCBs congeners is the extensive fragmentation of the molecular ion. The main fragmentation pattern recorded in the El mass spectra of PCBs was the loss of a chlorine atom from the molecular ion. Therefore the fragment-ion signal overlapped with the molecular-ion cluster of lower mass congener. The fragmentation reactions of PCBs arc suppressed if methane is used as a reagent gas for chemical ionization, but fragment ions are also present in the spectrum as ...an obstruction for quantitative analysis. The most selective method for PCBs quantitative analysis appears to be Cl with mass-selected C2H5+ ions from methane, which results in a mass spectrum with a negligible amount of fragment ions.
Keywords:
Aroclor / Chemical ionization / Electron impact ionization / Ion trap / Mass spectrometry / Polychlorinated biphenyls / Selected ion chemical ionizationSource:
Journal of the Serbian Chemical Society, 2000, 65, 5-6, 431-438Publisher:
- Serbian Chemical Society
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Vasiljević, Tatjana M. AU - Laušević, Mila D. AU - March, Raymond E. PY - 2000 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5335 AB - In the present paper a quadrupole ion trap mass spectrometer, coupled with a gas chromatograph, was used to compare the electron impact ionization (El) and chemical ionization (Cl) technique, in terms of their selectivity in polychlorinated biphenyls (PCBs) quantitative analysis. The experiments were carried out with a modified Varian SATURN III quadrupole ion-storage mass spectrometer equipped with Varian waveform generator, coupled with a gas chromatograph with DB-5 capillary column. The disadvantage of using El in the analysis of PCBs congeners is the extensive fragmentation of the molecular ion. The main fragmentation pattern recorded in the El mass spectra of PCBs was the loss of a chlorine atom from the molecular ion. Therefore the fragment-ion signal overlapped with the molecular-ion cluster of lower mass congener. The fragmentation reactions of PCBs arc suppressed if methane is used as a reagent gas for chemical ionization, but fragment ions are also present in the spectrum as an obstruction for quantitative analysis. The most selective method for PCBs quantitative analysis appears to be Cl with mass-selected C2H5+ ions from methane, which results in a mass spectrum with a negligible amount of fragment ions. PB - Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - Mass spectrometry analysis of polychlorinated biphenyls: Chemical ionization and selected ion chemical ionization using methane as a reagent gas EP - 438 IS - 5-6 SP - 431 VL - 65 DO - 10.2298/jsc0006431v ER -
@article{ author = "Vasiljević, Tatjana M. and Laušević, Mila D. and March, Raymond E.", year = "2000", abstract = "In the present paper a quadrupole ion trap mass spectrometer, coupled with a gas chromatograph, was used to compare the electron impact ionization (El) and chemical ionization (Cl) technique, in terms of their selectivity in polychlorinated biphenyls (PCBs) quantitative analysis. The experiments were carried out with a modified Varian SATURN III quadrupole ion-storage mass spectrometer equipped with Varian waveform generator, coupled with a gas chromatograph with DB-5 capillary column. The disadvantage of using El in the analysis of PCBs congeners is the extensive fragmentation of the molecular ion. The main fragmentation pattern recorded in the El mass spectra of PCBs was the loss of a chlorine atom from the molecular ion. Therefore the fragment-ion signal overlapped with the molecular-ion cluster of lower mass congener. The fragmentation reactions of PCBs arc suppressed if methane is used as a reagent gas for chemical ionization, but fragment ions are also present in the spectrum as an obstruction for quantitative analysis. The most selective method for PCBs quantitative analysis appears to be Cl with mass-selected C2H5+ ions from methane, which results in a mass spectrum with a negligible amount of fragment ions.", publisher = "Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "Mass spectrometry analysis of polychlorinated biphenyls: Chemical ionization and selected ion chemical ionization using methane as a reagent gas", pages = "438-431", number = "5-6", volume = "65", doi = "10.2298/jsc0006431v" }
Vasiljević, T. M., Laušević, M. D.,& March, R. E.. (2000). Mass spectrometry analysis of polychlorinated biphenyls: Chemical ionization and selected ion chemical ionization using methane as a reagent gas. in Journal of the Serbian Chemical Society Serbian Chemical Society., 65(5-6), 431-438. https://doi.org/10.2298/jsc0006431v
Vasiljević TM, Laušević MD, March RE. Mass spectrometry analysis of polychlorinated biphenyls: Chemical ionization and selected ion chemical ionization using methane as a reagent gas. in Journal of the Serbian Chemical Society. 2000;65(5-6):431-438. doi:10.2298/jsc0006431v .
Vasiljević, Tatjana M., Laušević, Mila D., March, Raymond E., "Mass spectrometry analysis of polychlorinated biphenyls: Chemical ionization and selected ion chemical ionization using methane as a reagent gas" in Journal of the Serbian Chemical Society, 65, no. 5-6 (2000):431-438, https://doi.org/10.2298/jsc0006431v . .
Related items
Showing items related by title, author, creator and subject.
-
Ionization energies of hypervalent Li2F, Li2Cl and Na2Cl molecules obtained by surface ionization electron impact neutralization mass spectrometry
Nešković, Olivera M.; Veljković, Miomir V.; Veličković, Suzana; Petkovska, LT; Perić-Grujić, Aleksandra (John Wiley & Sons Ltd, W Sussex, 2003) -
Production and ionization energies of KnF (n=2-6) clusters by thermal ionization mass spectrometry
Veljković, Filip M.; Đustebek, Jasmina B.; Veljković, Miomir V.; Veličković, Suzana; Perić-Grujić, Aleksandra (Wiley, Hoboken, 2012) -
Electron ionization tandem mass spectra of some 3-cyano-4-substituted phenyl-6-phenyl-2(1H)-pyridones
Marinković, Aleksandar; Perić-Grujić, Aleksandra; Jovanović, Bratislav Ž.; Ilić, Nataša; Nevešćanin, Marina (John Wiley & Sons Ltd, Chichester, 2006)