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Quantitative 1H NMR-analysis of technical octabrominated diphenylether DE-79™ and UV spectra of its components and photolytic transformation products

 
: Geller, A.-M.; Krüger, H.-U.; Liu, Q.; Zetzsch, C.; Elend, M.; Preiss, A.

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Chemosphere 73 (2008), Nr.1, S.S44-S52
ISSN: 0045-6535
ISSN: 0366-7111
International Symposium on Halogenated Environmental Organic Pollutants and POPs (Dioxin) <25, 2005, Toronto>
Englisch
Zeitschriftenaufsatz, Konferenzbeitrag
Fraunhofer ITEM ()
photolysis; DE-79™; DE-71™; BDF; high performance liquid chromatography; nuclear magnetic resonance spectroscopy

Abstract
A quantitative analysis of the technical octabromo diphenylether mixture DE-79 (TM) is performed by H-1 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 (TM) and pentaBDE DE-71 (TM) and UV spectra of the components of DE-79 (TM) are presented. The photolysis of the octaBDE mixture DE-79 (TM), 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.

: http://publica.fraunhofer.de/dokumente/N-83954.html