Stable carbon isotope analysis (δ13C values) of polybrominated diphenyl ethers and their UV-transformation products
| Autor: | Natalie Rosenfelder, Walter Vetter, Paul Bendig |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Carbon Isotopes
Bromine δ13C Ultraviolet Rays Compound specific Health Toxicology and Mutagenesis chemistry.chemical_element General Medicine Photochemical Processes Toxicology Pollution Polybrominated diphenyl ethers chemistry Isotopes of carbon Environmental chemistry Halogenated Diphenyl Ethers Organic chemistry Isotope-ratio mass spectrometry Environmental Monitoring Flame Retardants Isotope analysis |
| Zdroj: | Environmental Pollution. 159:2706-2712 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2011.05.020 |
| Popis: | Polybrominated diphenyl ethers (PBDEs) are frequently detected in food and environmental samples. We used compound specific isotope analysis to determine the δ(13)C values of individual PBDEs in two technical mixtures. Within the same technical product (DE-71 or DE-79), BDE congeners were the more depleted in (13)C the higher brominated they were. In contrast, the products of light-induced hydrodebromination of BDE 47 and technical DE-79 were more enriched in (13)C because of more stable bonds between (13)C and bromine. As a result, the δ(13)C values of the irradiated solution progressed diametrically compared to those of the technical synthesis. The ratio of the δ(13)C values of BDE 47 to BDE 99 and of BDE 99 to BDE 153 are thus suggested as indicators to distinguish native technical products from transformation products. Ratios1 are typical for native congeners (e.g. in DE-71) while the reversed ratio (1) is typical of transformation products. |
| Databáze: | OpenAIRE |
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