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Factorial-design optimization of gas chromatographic analysis of tetrabrominated to decabrominated diphenyl ethers. Application to domestic dust

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Abstract

Gas chromatographic analysis of polybrominated diphenyl ethers (PBDEs) has been evaluated in an attempt to achieve better control of the separation process, especially for highly substituted congeners. Use of a narrow-bore capillary column enabled adequate determination of tetra, penta, hexa, hepta, octa, nona and decaBDE congeners in only one chromatographic run while maintaining resolution power similar to that of conventional columns. A micro electron-capture detector (GC–μECD) was used. Chromatographic conditions were optimized by multifactorial experimental design, with the objective of obtaining not only high sensitivity but also good precision. In this way two different approaches to maximizing response and minimizing variability were tested, and are fully discussed. These optimum chromatographic conditions were then used to determine PBDEs extracted from domestic dust samples by microwave-assisted solvent extraction (MASE). Quantitative recovery (90–108%) was achieved for all the PBDEs and method precision (RSD < 13%) was satisfactory. Accuracy was tested by use of the standard reference material SRM 2585, and sub-ng g−1 limits of detection were obtained for all compounds except BDE-209 (1.44 ng g−1). Finally, several samples of house dust were analysed by use of the proposed method and all the target PBDEs were detected in all the samples. BDE-209 was the predominant congener. Amounts varied from 58 to 1615 ng g−1 and the average contribution to the total PBDE burden of 52%. The main congeners of the octaBDE mixture (BDE-183, BDE-197, BDE-207 and BDE-196) also made an important contribution (29%) to the total. These are the first data about the presence of these compounds in European house-dust samples. Finally, the sum of the main congeners in the pentaBDE commercial mixture (BDE-47, BDE-99, and BDE-100) contributed 14% to the total.

Polybrominated diphenyl ethers in House Dust

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Acknowledgement

This research was financed by FEDER funds and by projects CTQ2006-03334 from the CICYT (Ministerio de Ciencia y Tecnología, Spain) and PGIDIT04PXIC23701PN from Xunta de Galicia. J.R. acknowledges receipt of a doctoral grant from the CICYT.

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Authors and Affiliations

  1. Departamento de Química Analítica, Nutrición y Bromatología, Instituto de Investigación y Análisis de Alimentarios, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain

    Jorge Regueiro, Maria Llompart, Carmen Garcia-Jares & Rafael Cela

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  1. Jorge Regueiro
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  2. Maria Llompart
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  3. Carmen Garcia-Jares
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  4. Rafael Cela
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Correspondence to Carmen Garcia-Jares.

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Regueiro, J., Llompart, M., Garcia-Jares, C. et al. Factorial-design optimization of gas chromatographic analysis of tetrabrominated to decabrominated diphenyl ethers. Application to domestic dust. Anal Bioanal Chem 388, 1095–1107 (2007). https://doi.org/10.1007/s00216-007-1350-8

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  • DOI: https://doi.org/10.1007/s00216-007-1350-8

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