Selective detection of Isomers with Photoionization mass spectrometry for studies of hydrocarbon flame chemistry
type: Dataset
description: We report the first use of synchrotron radiation, continuously tunable from 8 to 15 eV, for flame-sampling photoionization mass spectrometry (PIMS). Synchrotron radiation offers important advantages over the use of pulsed vacuum ultraviolet lasers for PIMS; these include superior signal-to-noise, soft ionization, and access to photon energies outside the limited tuning ranges of current VUV laser sources. Near-threshold photoionization efficiency measurements were used to determine the absolute concentrations of the allene and propyne isomers of C3H4 in low-pressure laminar ethylene–oxygen and benzene–oxygen flames. Similar measurements of the isomeric composition of C2H4O species in a fuel-rich ethylene–oxygen flame revealed the presence of substantial concentrations of ethenol (vinyl alcohol) and acetaldehyde. Ethenol has not been previously detected in hydrocarbon flames. Absolute photoionization cross sections were measured for ethylene, allene, propyne, and acetaldehyde, using propene as a calibration standard. PIE curves are presented for several additional reaction intermediates prominent in hydrocarbon flames.
issued: 2026-05-06T04:29:03.420010
language: en
modified: 2026-05-06T04:29:03.420015
contact point: Organization
  fn: CCSD
keyword: 3380eh-4160ap-0350de-4272bj
keyword: chimtheochemical-sciencestheoretical-andor-physical-chemistry
keyword: flames
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: mass-spectra
keyword: photoionisation
keyword: synchrotron-radiation
landing page: 0021-9606

Selective detection of Isomers with Photoionization mass spectrometry for studies of hydrocarbon flame chemistry
type: Distribution
format: HTML
issued: 2026-05-06T04:29:03.436778
modified: 2026-05-06T04:29:03.399180
access URL: https://hal.science/hal-00095417

test_moissonnage_selune
type: Agent