Fixed-wavelength R2PI/tandem mass spectrometry for mixture analysis in the quadrupole ion trap

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Many aromatic molecules have strong absorption bands in the uv which are rather broad at room temperature; the ionization potentials for many such polyatomics are also often less than 9 eV. Therefore, they can be ionized with high efficiency by resonance enhanced two-photon ionization (R2PI) using the frequency-quadrupled output of the Nd:YAG laser at 266 nm (4.7 eV). Because the degree of fragmentation accompanying R2PI is a function of laser power, mass spectrometric analysis of such fragments also can often improve the specificity of the overall analysis. However, in the case of organic mixture analysis, the complexity of R2PI/fragmentation mass ... continued below

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Goeringer, D.E.; Glish, G.L. & McLuckey, S.A. January 1, 1991.

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Many aromatic molecules have strong absorption bands in the uv which are rather broad at room temperature; the ionization potentials for many such polyatomics are also often less than 9 eV. Therefore, they can be ionized with high efficiency by resonance enhanced two-photon ionization (R2PI) using the frequency-quadrupled output of the Nd:YAG laser at 266 nm (4.7 eV). Because the degree of fragmentation accompanying R2PI is a function of laser power, mass spectrometric analysis of such fragments also can often improve the specificity of the overall analysis. However, in the case of organic mixture analysis, the complexity of R2PI/fragmentation mass spectra may compromise compound identification tandem mass spectrometry (MS/MS) can also enhance the specificity of analysis over that provided by a single stage of mass spectrometry. Although R2PI/fragmentation and MS/MS can yield complementary data, situations may often occur in which the spectra reveal no unique structural information. Nevertheless, the combination of R2PI and MS/MS can still provide an advantage over the use of R2PI alone.

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Pages: (3 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • American Society for Mass Spectrometry (ASMS) meeting, Nashville, TN (USA), 19-24 May 1991

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  • Other: DE91012506
  • Report No.: CONF-9105181-2
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5882852
  • Archival Resource Key: ark:/67531/metadc1102969

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  • January 1, 1991

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  • Feb. 18, 2018, 3:59 p.m.

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  • May 11, 2018, 2:38 p.m.

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Goeringer, D.E.; Glish, G.L. & McLuckey, S.A. Fixed-wavelength R2PI/tandem mass spectrometry for mixture analysis in the quadrupole ion trap, article, January 1, 1991; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1102969/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.