Ion-Molecule Reactions of Halocarbon Cations with Polycyclic Aromatic Hydrocarbons in a Quadrupole Ion Trap. Part II—applications to environmental analysis

✍ Scribed by Mosi, Andrew A.; Cullen, William R.; Eigendorf, Guenter K.

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 593 KB
• Volume: 33
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/(sici)1096-9888(199803)33:3<250::aid-jms628>3.0.co;2-i

✦ Synopsis

Ion-molecule reactions between the cations and generated from 1,1-diÑuoroethane and gas CH 3 CHF' CH 3 CF 2 ' chromatographic eluents from a sediment extract containing polycyclic aromatic hydrocarbons (PAHs) were used to di †erentiate groups of PAH structural isomers. Formation of speciÐc adducts led to characteristic mass spectra for the di †erent isomers. Di †erences in the ion chromatograms for M', MH',

Ô HF ] ' resolution of co-eluting isomers. As the ratio of yields of adducts was not changed by methyl substitution, it was possible to di †erentiate and quantitate alkylated PAHs for which standards were not available. By performing a series of transformations between the ion chromatograms of the most characteristic adducts, information on individual isomer groups could be deconvoluted from complex clusters of isomers. This ion trap/chemical ionization technique displayed calibration curve parameters similar to those for electron ionization analysis and limits of detection of 170 pg in the sediment extract. 1998