Characterization of polycyclic aromatic hydrocarbons by laser mass spectrometry

Balasanmugam, K.; Viswanadham, S. K.; Hercules, David M.

doi:10.1021/ac00297a027

Cited by 34 publications

(25 citation statements)

References 16 publications

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“…The contribution to the M + 1 peak is slightly greater than the expected 15–25% contribution from 13 C, suggesting that there is some contribution to the M + 1 peak from [M + H] + . This is consistent to what has been observed in LDI of PAHs17 where protonated molecules were observed even in the absence of an obvious proton source. The Na + and K + peaks result from alkali metal impurities in the sample.…”

Section: Resultssupporting

confidence: 91%

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Infrared matrix‐assisted laser desorption/ionization of polycyclic aromatic hydrocarbons with a sulfolane matrix

Jackson

Murray

2001

Rapid Comm Mass Spectrometry

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Infrared matrix-assisted laser desorption/ionization (IR-MALDI) of the polyaromatic hydrocarbons (PAHs) anthracene, benzo[a]pyrene, and dibenz[a,h]anthracene was performed using a 10.6-microm CO2 laser and a liquid matrix. Sulfolane (tetrahydrothiophene 1,1-dioxide) was found to be an effective matrix for PAH ionization: mass spectra obtained with a sulfolane matrix contain an intense molecular ion peak; interference from PAH fragment and matrix peaks is negligible in all cases. The main limitation of the sulfolane matrix is sample evaporation after 3 to 5 min in vacuum. This sample lifetime can be increased to between 15 and 30 min using a 2:1 (v/v) mixture of sulfolane and glycerol, but the resulting spectra have greater matrix interference and decreased shot-to-shot signal stability.

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Section: Resultssupporting

confidence: 91%

“…The absence of an acidic proton in sulfolane was cited as an additional reason for the lack of protonation. This result is supported by LDI results that suggest a correlation between the availability of protons and the degree of protonation of the PAH 17…”

Section: Resultssupporting

confidence: 68%

Infrared matrix‐assisted laser desorption/ionization of polycyclic aromatic hydrocarbons with a sulfolane matrix

Jackson

Murray

2001

Rapid Comm Mass Spectrometry

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“…In the latter case the dominant spectral peaks are the readily identified benzenoid PAHs ranging mainly from M + = 202 to 302 u and their weaker (M-2) + photofragments of the LMMS process [9,26]. In the diesel mass spectra the latter compounds are present together with carbon clusters C + n , polyynes compounds C 2n H 2 , photofragments of the nitro-PAH compounds, and other unidentified mass peaks.…”

Section: Diesel Tunnel Samplesmentioning

confidence: 97%

Polycyclic aromatic hydrocarbons in flames, in diesel fuels, and in diesel emissions

Dobbins

Fletcher

Benner

et al. 2006

Combustion and Flame

122

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“…Some experimental approaches have been proposed to overcome the drawbacks of commonly used techniques for PAH and chromium compound characterization. More specifically, two‐step laser mass spectrometry (L2MS) and laser desorption mass spectrometry (LD‐MS) have been used to analyze PAHs adsorbed on various supports, such as, for example, gasoline particulate matter or diesel particulate matter (DPM) 10–13. For the determination of chromium oxidation state, in situ techniques such as Raman14, 15 or X‐ray absorption spectroscopy16 (mostly X‐ray absorption structure near‐edge structure: XANES17–20) have been developed.…”

mentioning

confidence: 99%

Potential of laser ablation and laser desorption mass spectrometry to characterize organic and inorganic environmental pollutants on dust particles

Carré¹,

Aubriet²,

Scheepers³

et al. 2005

Rapid Comm Mass Spectrometry

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Stainless steel factories are known to release particles into the atmosphere. Such particulate matter contains significant amounts of heavy metals or toxic inorganic compounds and organic pollutants such as, for example, Cr(VI) and polycyclic aromatic hydrocarbons (PAHs). The investigation of Cr(VI) and PAHs is often complicated by the associated matrix. Organic and inorganic pollutants present in stainless steel dust particles have been investigated with the same laser microprobe mass spectrometer according to two original methodologies. These analytical methods do not require time-consuming pretreatment (extraction, solubilization) or preconcentration steps. More specifically, experiments are conducted with a Fourier transform ion cyclotron resonance mass spectrometer coupled to an ArF (193 nm) or a tripled frequency Nd-YAG (355 nm) laser. Experiments at 355 nm allow the nature of the most frequently occurring Cr(III)/Cr(VI) compounds in dust particles to be identified. Examination of PAHs at 193 nm is assisted by the formation of pi-complexes with 7,7',8,8'-tetracyanoquinodimethane to prevent their evaporation in the mass spectrometer during analysis and to ensure an increase in sensitivity.

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Characterization of polycyclic aromatic hydrocarbons by laser mass spectrometry

Cited by 34 publications

References 16 publications

Infrared matrix‐assisted laser desorption/ionization of polycyclic aromatic hydrocarbons with a sulfolane matrix

Infrared matrix‐assisted laser desorption/ionization of polycyclic aromatic hydrocarbons with a sulfolane matrix

Polycyclic aromatic hydrocarbons in flames, in diesel fuels, and in diesel emissions

Potential of laser ablation and laser desorption mass spectrometry to characterize organic and inorganic environmental pollutants on dust particles

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