Record Display for the EPA National Library CatalogRECORD NUMBER: 6 OF 20
|Main Title||Comparative Analysis of Dioxins and Furans in Ambient Air by High Resolution and Electron Capture Mass Spectrometry.|
|Author||Koester, C. J. ; Harless, R. L. ; Hites, R. A. ;|
|CORP Author||Indiana Univ. at Bloomington.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.|
|Report Number||EPA-R-812588; EPA/600/J-92/264;|
|Additional Subjects||Polychlorinated dibenzodioxins ; Polychlorinated dibenzofurans ; Mass spectroscopy ; Air pollution ; Air sampling ; Toxic materials ; Accuracy ; Error analysis ; Reprints ; High resolution mass spectrometry ; Electron capture mass spectrometry|
Known mixtures and unknown atmospheric sample extracts containing polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/F) were analyzed by both electron impact, high resolution, mass spectrometry (HRMS) and by electron capture, negative ion, low resolution mass spectrometry (ECNI). PCDD/F concentrations measured by the two methods were comparable, typically agreeing with + or - 33%. The major difference between the two techniques is that HRMS easily detects 2,3,7,8- tetrachlorodibenzo-p-dioxin but ECNI does not. Results suggest that ECNI can be a sensitive low cost alternative to HRMS for the determination of PCDD/F concentrations.