Direct determination of polycyclic aromatic hydrocarbons in solid matrices using laser desorption/laser photoionization ion trap mass spectrometry

Direct determination of polycyclic aromatic hydrocarbons in solid matrices using laser desorption/laser photoionization ion trap mass spectrometry

The development and characterization of a new instrument for solid sampling which couples IR laser desorption followed by UV laser photo-ionization and analysis using an ion trap mass spectrometer has been investigated. For calibration, a new type of solid sample preparation involving activated char...

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Bibliographic Details
Published in:Journal of the American Society for Mass Spectrometry Vol. 14; no. 6; pp. 562 - 570
Main Authors: Specht, A.A, Blades, M.W
Format: Journal Article
Language:English
Published: New York, NY Elsevier Inc 01-06-2003
Elsevier Science
Springer Nature B.V
Subjects:
Activated carbon
Analysis methods
Analytical chemistry
Applied sciences
Charcoal
Charcoal - analysis
Chemistry
Couples
Desorption
Exact sciences and technology
Infrared radiation
Infrared Rays
Ionization
Ions
Lasers
Mass spectrometry
Photoionization
Pollution
Polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons - analysis
Pretreatment
Pyrenes - analysis
Reproducibility of Results
Software
Soil and sediments pollution
Spectrometric and optical methods
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization - instrumentation
Ultraviolet Rays
Water Pollutants, Chemical - analysis
Chemical analysis
Resonance state
Hydrocarbon
Polycyclic aromatic compound
Soil pollution
Sediments
Certified reference material
Laser desorption
Ion trap
Photoionization
Qualitative analysis
Multiphoton ionization
Mass spectrometry
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Summary:The development and characterization of a new instrument for solid sampling which couples IR laser desorption followed by UV laser photo-ionization and analysis using an ion trap mass spectrometer has been investigated. For calibration, a new type of solid sample preparation involving activated charcoal as the solid substrate was used. This solid sample provided a steady signal for several thousand laser shots, which allowed optimization of the experimental procedure. It was found that both the IR and UV intensity and the delay between them play an important role in both the magnitude and type of signals observed. A method of gas phase accumulation with multiple laser shots was examined. Finally, this technique was demonstrated to be effective in providing direct qualitative information for N.I.S.T. SRM 1944 river sediment sample with no sample pre-treatment.
ISSN:1044-0305
1879-1123
DOI:10.1016/S1044-0305(03)00143-0