title: Quantitative 1H NMR-analysis of technical octabrominated diphenylether DE-79 and UV spectra of its components and photolytic transformation products.
abstract: A quantitative analysis of the technical octabromo diphenylether mixture DE-79 is performed by (1)H NMR, avoiding any separation technique. The mass fractions are 36% BDE183, 19% BDE197, 13.1% BDE207, 9.1% BDE196, 7.3% BDE153, 6.2% BDE203, 2.2% BDE180, 1.6% BDE171, 1.2% BDE154 and 0.7% BDE206, considering an additional mass fraction of 1.3% BDE209 determined by HPLC analysis with a diode array detector (DAD). HPLC chromatograms of the BDEs in commercial decaBDE, octaBDE DE-79 and pentaBDE DE-71 and UV spectra of the components of DE-79 are presented. The photolysis of the octaBDE mixture DE-79, dissolved in tetrahydrofuran, by simulated sunlight is monitored by HPLC-DAD and observed to proceed mainly via debromination. Polybrominated dibenzofurans are identified from their UV spectra as significant intermediates.
authors.affiliation: Atmospheric Chemistry Research Laboratory, University of Bayreuth, Dr.-Hans-Frisch-Str. 1-3, 95448 Bayreuth, Germany.
authors.forename: Ana-Maria
authors.initials: AM
authors.lastname: Geller
authors.forename: Heinz-Ulrich
authors.initials: HU
authors.lastname: Krüger
authors.forename: Qing
authors.initials: Q
authors.lastname: Liu
authors.forename: Cornelius
authors.initials: C
authors.lastname: Zetzsch
authors.forename: Manfred
authors.initials: M
authors.lastname: Elend
authors.forename: Alfred
authors.initials: A
authors.lastname: Preiss
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004566:Electrodes; D055768:Halogenated Diphenyl Ethers; D009682:Magnetic Resonance Spectroscopy; D010647:Phenyl Ethers / Q000032:analysis* / Q000737:chemistry* / Q000302:isolation & purification; D010782:Photolysis; D011075:Polybrominated Biphenyls / Q000032:analysis* / Q000737:chemistry* / Q000302:isolation & purification; D013056:Spectrophotometry, Ultraviolet
chemical_list: D055768:Halogenated Diphenyl Ethers; D010647:Phenyl Ethers; D011075:Polybrominated Biphenyls; C086401:pentabromodiphenyl ether