Synthesis and analytical characterization of all tetra to octachlorodibenzo-p-dioxins

Donald George Jr Patterson, V. V. Reddy, E. R. Barnhart, D. L. Ashley, C. R. Lapeza, L. R. Alexander, L. T. Gelbaum

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We describe the synthesis and analytical characterization of the tetrachlorodibenzo-through octachlorodibenzo-p-dioxins. We determined the relative response factors for each chlorinated dioxin by both electron impact (EI) and negative chemical ionization mass spectrometry (NCI). An assumption of a 1:1 response factor for a polychlorinated dibenzo-p-dioxin (PCDD) congener within a group with the same number of chlorines is valid in EI but is not a valid assumption in NCI. We have determined the proton nuclear magnetic resonance chemical shift and coupling constants for each PCDD. All of the tetrachlorinated through heptachlorinated congeners, with two exceptions, gave appropriate first order proton spectra in Benzene-d6. The vapor phase infrared absorption bands are unique for each PCDD congener and allow a second method of structural assignment.

Original languageEnglish (US)
Pages (from-to)233-240
Number of pages8
JournalChemosphere
Volume19
Issue number1-6
DOIs
StatePublished - Jan 1 1989

Fingerprint

dioxin
Nuclear magnetic resonance
Electrons
Protons
Infrared absorption
Chemical shift
Chlorine
Ionization
Mass spectrometry
Absorption spectra
Benzene
Dioxins
Vapors
Mass Spectrometry
Magnetic Resonance Spectroscopy
electron
benzene
nuclear magnetic resonance
chlorine
ionization

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Patterson, D. G. J., Reddy, V. V., Barnhart, E. R., Ashley, D. L., Lapeza, C. R., Alexander, L. R., & Gelbaum, L. T. (1989). Synthesis and analytical characterization of all tetra to octachlorodibenzo-p-dioxins. Chemosphere, 19(1-6), 233-240. https://doi.org/10.1016/0045-6535(89)90317-2
Patterson, Donald George Jr ; Reddy, V. V. ; Barnhart, E. R. ; Ashley, D. L. ; Lapeza, C. R. ; Alexander, L. R. ; Gelbaum, L. T. / Synthesis and analytical characterization of all tetra to octachlorodibenzo-p-dioxins. In: Chemosphere. 1989 ; Vol. 19, No. 1-6. pp. 233-240.
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Patterson, DGJ, Reddy, VV, Barnhart, ER, Ashley, DL, Lapeza, CR, Alexander, LR & Gelbaum, LT 1989, 'Synthesis and analytical characterization of all tetra to octachlorodibenzo-p-dioxins', Chemosphere, vol. 19, no. 1-6, pp. 233-240. https://doi.org/10.1016/0045-6535(89)90317-2

Synthesis and analytical characterization of all tetra to octachlorodibenzo-p-dioxins. / Patterson, Donald George Jr; Reddy, V. V.; Barnhart, E. R.; Ashley, D. L.; Lapeza, C. R.; Alexander, L. R.; Gelbaum, L. T.

In: Chemosphere, Vol. 19, No. 1-6, 01.01.1989, p. 233-240.

Research output: Contribution to journalArticle

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AB - We describe the synthesis and analytical characterization of the tetrachlorodibenzo-through octachlorodibenzo-p-dioxins. We determined the relative response factors for each chlorinated dioxin by both electron impact (EI) and negative chemical ionization mass spectrometry (NCI). An assumption of a 1:1 response factor for a polychlorinated dibenzo-p-dioxin (PCDD) congener within a group with the same number of chlorines is valid in EI but is not a valid assumption in NCI. We have determined the proton nuclear magnetic resonance chemical shift and coupling constants for each PCDD. All of the tetrachlorinated through heptachlorinated congeners, with two exceptions, gave appropriate first order proton spectra in Benzene-d6. The vapor phase infrared absorption bands are unique for each PCDD congener and allow a second method of structural assignment.

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Patterson DGJ, Reddy VV, Barnhart ER, Ashley DL, Lapeza CR, Alexander LR et al. Synthesis and analytical characterization of all tetra to octachlorodibenzo-p-dioxins. Chemosphere. 1989 Jan 1;19(1-6):233-240. https://doi.org/10.1016/0045-6535(89)90317-2