PuSH - Publication Server of Helmholtz Zentrum München: In-line catalytic derivatization method for selctive detection of chlorinated aromatics with a hyphenated gas chromatography/ Laser mass spectrometry technique : A concept for comprehensive detection of isomeric ensembles.

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Zimmermann, R. ; Rohwer, E.R.* ; Heger, H.J.

In-line catalytic derivatization method for selctive detection of chlorinated aromatics with a hyphenated gas chromatography/ Laser mass spectrometry technique : A concept for comprehensive detection of isomeric ensembles.

Anal. Chem. 71, 4148-4153 (1999)

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The combination of gas chromatography (GC) and laser-based resonance-enhanced multiphoton ionization-time-of-flight mass spectrometry (REMPI-TOFMS) represents a three-dimensional analytical method, using the gas chromatographic retention time, the wavelength of the ionization laser for REMPI, and the molecular mass as analytical parameters. In this work, a novel analytical scheme for detection of chlorinated aromatic compounds, including isomeric ensembles, by GC/REMPI-TOFMS is presented. The concept uses an in-line hydrodechlorination catalyst for post- or precolumn derivatization of chlorinated aromatic compounds. The chlorinated aromatics are quantitatively reduced, forming their respective aromatic skeletons. These aromatic skeletons are detected selectively by REMPI-TOFMS. The first results for substance class selective detection of chlorinated benzene isomers are given, and potential applications in the field of the analysis of compounds such as polychlorinated dibenzo-p-dioxins and -furans are discussed.

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