Multiphoton ionization/mass spectrometry of polybrominated diphenyl ethers

Shitamichi, Osamu; Imasaka, Tomoko; Uchimura, Tomohiro

doi:10.1039/c1ay05355h

Cited by 9 publications

(7 citation statements)

References 40 publications

(45 reference statements)

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“…[11][12][13][14][15][16][17][18][19][20][21] The MPI technique reduces undesirable interfering signals and enables the acquisition of a mass spectrum with fewer fragment peaks.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Persistent Organic Pollutants at Sub-Femtogram Levels Using a High-Power Picosecond Laser for Multiphoton Ionization in Conjunction with Gas Chromatography/Time-of-Flight Mass Spectrometry

et al. 2012

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A low-energy, high-repetition-rate picosecond laser (40 μJ, 20 kHz, 258 nm) was used for multiphoton ionization (MPI) in gas chromatography/time-of-flight mass spectrometry to quantitatively determine dioxins (DXNs) and polycyclic aromatic hydrocarbons (PAHs). The sensitivity of the technique was compared with that obtained using a high-energy, low-repetition-rate femtosecond laser (86 μJ, 1 kHz, 261 nm). The limits of detection (LODs) for the picosecond laser were several femtograms for chlorinated DXNs with low numbers of chloro substituents, and were several times lower than values obtained using a femtosecond laser, although the LODs were increased, reaching values that were nearly identical to those for the femtosecond laser for octachlorodibenzo-p-dioxin (octaCDD) and octachlorodibenzofuran (octaCDF). The LODs were also measured for 16 PAHs specified by the United States Environmental Protection Agency; the values for half of these compounds were at sub-femtogram levels. The procedure was used to analyze a surface-water sample collected from a river.

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“…[11][12][13][14][15][16][17][18][19][20][21] The MPI technique reduces undesirable interfering signals and enables the acquisition of a mass spectrum with fewer fragment peaks.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Persistent Organic Pollutants at Sub-Femtogram Levels Using a High-Power Picosecond Laser for Multiphoton Ionization in Conjunction with Gas Chromatography/Time-of-Flight Mass Spectrometry

et al. 2012

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“…Moreover, several laser ionization techniques have been reported for the sensitive detection of one or more constituents in a sample. 30,31 Although further studies should establish an appropriate internal standard and a preparation scheme for emulsions, MPI-TOFMS could become a powerful tool for the quantitative analysis of emulsions, and this would allow direct evaluations of stability, such as creaming, by promoting a better understanding of the local concentration of emulsions.…”

Section: Discussionmentioning

confidence: 99%

A Quantitative Analysis of an Oil Component in an Emulsion by Multiphoton Ionization Mass Spectrometry

Fukaya

Uchimura

2017

ANAL. SCI.

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“…However, in these QSPR models, the excitation energy was not included as the molecular descriptors, and the studies on the relationship between the excitation states and the photodebromination of PBDEs are still insufficient and incomplete [ 28 ]. It is generally believed that, by spin-orbit coupling, halogenated aromatic hydrocarbons can be efficiently relaxed to triplet levels [ 29 ]. Triplet excited states are important in many kinds of photo-induced reactions due to the relatively long lifetimes bestowed on excited triplet species [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Excited States and Photodebromination of Selected Polybrominated Diphenyl Ethers: Computational and Quantitative Structure—Property Relationship Studies

Luo

Wei

et al. 2015

IJMS

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This paper presents a density functional theory (DFT)/time-dependent DFT (TD-DFT) study on the lowest lying singlet and triplet excited states of 20 selected polybrominateddiphenyl ether (PBDE) congeners, with the solvation effect included in the calculations using the polarized continuum model (PCM). The results obtained showed that for most of the brominated diphenyl ether (BDE) congeners, the lowest singlet excited state was initiated by the electron transfer from HOMO to LUMO, involving a π–σ* excitation. In triplet excited states, structure of the BDE congeners differed notably from that of the BDE ground states with one of the specific C–Br bonds bending off the aromatic plane. In addition, the partial least squares regression (PLSR), principal component analysis-multiple linear regression analysis (PCA-MLR), and back propagation artificial neural network (BP-ANN) approaches were employed for a quantitative structure-property relationship (QSPR) study. Based on the previously reported kinetic data for the debromination by ultraviolet (UV) and sunlight, obtained QSPR models exhibited a reasonable evaluation of the photodebromination reactivity even when the BDE congeners had same degree of bromination, albeit different patterns of bromination.

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Multiphoton ionization/mass spectrometry of polybrominated diphenyl ethers

Cited by 9 publications

References 40 publications

Analysis of Persistent Organic Pollutants at Sub-Femtogram Levels Using a High-Power Picosecond Laser for Multiphoton Ionization in Conjunction with Gas Chromatography/Time-of-Flight Mass Spectrometry

Analysis of Persistent Organic Pollutants at Sub-Femtogram Levels Using a High-Power Picosecond Laser for Multiphoton Ionization in Conjunction with Gas Chromatography/Time-of-Flight Mass Spectrometry

A Quantitative Analysis of an Oil Component in an Emulsion by Multiphoton Ionization Mass Spectrometry

Excited States and Photodebromination of Selected Polybrominated Diphenyl Ethers: Computational and Quantitative Structure—Property Relationship Studies

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