Wavelength-resolved REMPI mass spectrometry in a hostile industrial environment, limitations and promises of the method

Nomayo, M.; Thanner, R.; Grotheer, Horst-Henning

doi:10.1007/s003400000428

Cited by 8 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As eqn (7) includes the assumption that any dynamics in the intermediate excited state does not alter the ionization probability, there is no dependence on the pulse length. However, this is not the case when we consider the yield of ions from air given by eqn (6).…”

Section: Discussionmentioning

confidence: 99%

“…This can be further optimized if the gas is cooled in a jet expansion to limit transitions from excited vibrational and rotational levels of the ground electronic state. 4 This Jet-REMPI scheme is very useful in complex samples as it also allows isobars and isomers to be clearly identified, for example xylenes [5][6][7] and xylenols. 8 The pulsed nature of these sources makes them ideally suited for integration into time-of-flight (ToF) mass spectrometers.…”

Section: Introductionmentioning

confidence: 99%

“…Since the typical laser intensities are well below that required for non-resonant ionization of background gases, very high sensitivities can be obtained from direct analysis of gas samples without pre-concentration. As a result REMPI has been employed in a number of environmental monitoring studies, particularly in the study of the chemical composition of the exhaust gases from combustion processes such as waste incineration, 6,7,9,10 and engines or generators 4,5,11 (see Streibel and Zimmermnn for a recent review 12 ). These studies have demonstrated that an extensive range of volatile organic compounds (VOCs) such as simple aromatics [4][5][6]10,11,13 aldehydes, 4,14 amines, 15 polychlorinated biphenyls (PCBs), 14,16,17 poly-aromatic hydrocarbons (PAHs) 5,[9][10][11] and dioxins 18 can be detected at parts per trillion ( ppt) concentration levels.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of localized surface plasmons on Pauli blocking and optical limiting in graphene under femtosecond pumping

Bongu

Bisht

Namboodiri

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

Many organic molecules have strong absorption bands which can be accessed by ultraviolet short pulse lasers to produce efficient ionization. This resonant multiphoton ionization scheme has already been exploited as an ionization source in time-of-flight mass spectrometers used for environmental trace analysis. In the present work we quantify the ultimate potential of this technique by measuring absolute ion yields produced from the interaction of 267 nm femtosecond laser pulses with the organic molecules indole and toluene, and gases Xe, N 2 and O 2 . Using multiphoton ionization cross sections extracted from these results, we show that the laser pulse parameters required for real-time detection of aromatic molecules at concentrations of one part per trillion in air and a limit of detection of a few attomoles are achievable with presently available commercial laser systems. The potential applications for the analysis of human breath, blood and tissue samples are discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of localized surface plasmons on Pauli blocking and optical limiting in graphene under femtosecond pumping

Bongu

Bisht

Namboodiri

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…[5][6][7][8] Further discrimination in the ionization stage can also be obtained using a two color scheme, as has been demonstrated in nitric oxide. A 10 ps pulse at 267 nm can in principal support a bandwidth of 2 cm −1 (0.01 nm), which can easily resolve vibrational structure in the absorption spectrum.…”

Section: Discussionmentioning

confidence: 99%

“…As a result REMPI has been employed in a number of environmental monitoring studies, particularly in the study of the chemical composition of the exhaust gases from combustion processes such as waste incineration, 6,7,9,10 and engines or generators 4,5,11 (see Streibel and Zimmermnn for a recent review 12 ). As a result REMPI has been employed in a number of environmental monitoring studies, particularly in the study of the chemical composition of the exhaust gases from combustion processes such as waste incineration, 6,7,9,10 and engines or generators 4,5,11 (see Streibel and Zimmermnn for a recent review 12 ).…”

Section: Introductionmentioning

confidence: 99%

Detection limits of organic compounds achievable with intense, short-pulse lasers

Miles

Camillis

Alexander

et al. 2015

Analyst

View full text Add to dashboard Cite

Many organic molecules have strong absorption bands which can be accessed by ultraviolet short pulse lasers to produce efficient ionization. This resonant multiphoton ionization scheme has already been exploited as an ionization source in time-of-flight mass spectrometers used for environmental trace analysis. In the present work we quantify the ultimate potential of this technique by measuring absolute ion yields produced from the interaction of 267 nm femtosecond laser pulses with the organic molecules indole and toluene, and gases Xe, N2 and O2. Using multiphoton ionization cross sections extracted from these results, we show that the laser pulse parameters required for real-time detection of aromatic molecules at concentrations of one part per trillion in air and a limit of detection of a few attomoles are achievable with presently available commercial laser systems. The potential applications for the analysis of human breath, blood and tissue samples are discussed.

show abstract

R2PI Spectroscopy of Aromatic Molecules Produced in an Ethylene-Rich Flame

2013

View full text Add to dashboard Cite

Laser spectroscopy, combined with mass spectrometry, was applied to study the spectra of aromatic molecules produced in a premixed ethylene-rich flat flame. These studies produce new gas-phase electronic spectra of polyaromatic compounds, which ultimately will guide the understanding of the chemical processes that lead to polycyclic aromatic hydrocarbon (PAH) growth or PAH formation locking. Resonant two-photon ionization (R2PI) spectra of all species detectable in a specific fuel-rich flame were recorded simultaneously during a single scan of the laser wavelength, within the 220-330 nm range. Comparison with spectra available in the literature allowed us to identify 16 aromatic species. In the PAH forming region of this flame, we found that the main PAHs are accompanied by a great diversity of other species, including in particular various side-chains on aromatic networks. We also show that this technique allows, at least in some cases, to distinguish between different isomers associated with the same mass peak, although the extracted PAHs are only cooled down to room temperature.

show abstract

Wavelength-resolved REMPI mass spectrometry in a hostile industrial environment, limitations and promises of the method

Cited by 8 publications

References 0 publications

Influence of localized surface plasmons on Pauli blocking and optical limiting in graphene under femtosecond pumping

Influence of localized surface plasmons on Pauli blocking and optical limiting in graphene under femtosecond pumping

Detection limits of organic compounds achievable with intense, short-pulse lasers

R2PI Spectroscopy of Aromatic Molecules Produced in an Ethylene-Rich Flame

Contact Info

Product

Resources

About