Mass-selected resonance-enhanced multiphoton ionisation spectra of laser-desorbed molecules for environmental

¹Institute for Physical and Theoretical Chemistry, Technical University Munich, 85747 Garching, Germany.

European Journal of Mass Spectrometry (Chichester, England)

|May 16, 2003

Abstract:

Mass-selected gas-phase UV spectra of laser-desorbed molecules at room temperature have been measured via resonance-enhanced multiphoton ionisation (REMPI) and time-of-flight mass selection. The wavelength range of 260 to 320 nm is optimal for detection of polycyclic aromatic hydrocarbons (PAHs) using REMPI-mass spectrometry. A new laser desorption/laser ionisation source has been used which features a compact size and thermal equilibrium of the desorbed molecules. 16 PAHs have been investigated which have been selected by the US Environmental Protection Agency (EPA). These 16 EPA-PAHs are commonly used world-wide to characterise the PAH-load of environmental samples.

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Mass-selected resonance-enhanced multiphoton ionisation spectra of laser-desorbed molecules for environmental...

Abstract:

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Mass-selected resonance-enhanced multiphoton ionisation spectra of laser-desorbed molecules for environmental