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Performance of a Gas Chromatographic-Matrix Isolation-Fourier Transform Infrared Spectrometer

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The unique matrix-isolated (MI) Fourier transform infrared spectra of diethyl ether, propanal, and trifluoromethane are compared with their vapor-phase spectra. The marked increase in resolution seen in the MI spectra is accompanied by substantial frequency shifts from the peaks in the vapor-phase spectra. The spectra were generated with a gas chromatographic/matrix isolation/Fourier transform infrared spectrometer, with the use of frozen Ar at 13 K as the isolating matrix. The spectra of the 22 isomers of tetrachlorodibenzo-p-dioxin show that each isomer can be distinguished and quantitated at the nanogram level. In addition, preliminary quantitative data were obtained for the pesticides Terbufos® and Fonofos®. Finally, a problem with a previously published spectrum of C-13 2,3,7,8-tetrachlorodibenzo-p-dioxin was uncovered, and it was shown that the spectrum was actually that of C-13 2,3,7-trichlorodibenzo-p-dioxin.

Keywords: Diethyl ether; FT-IR; Fonofos®; Fourier transform infrared; GC/MI/FT-IR; Matrix isolation; Propanal; Terbufos®; Tri-and tetrachlorodibenzo-p-dioxin; Trifluoromethane

Document Type: Research Article


Affiliations: 1: Environmental Monitoring and Compliance Branch, Environmental Services Division, U.S. E.P.A., Region VII, 25 Funston Road, Kansas City, Kansas 66115 2: Computer Science Corporation, 25 Funston Road, Kansas Cíty, Kansas 66115

Publication date: February 1, 1988

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