Abstract
A rapid, robust and economical method for the analysis of persistent halogenated organic compounds in small volumes of human serum and umbilical cord blood is described. The pollutants studied cover a broad range of molecules of contemporary epidemiological and legislative concern, including polychlorobiphenyls (PCBs), polychlorobenzenes (CBs), hexachlorocyclohexanes (HCHs), DDTs, polychlorostyrenes (PCSs) and polybromodiphenyl ethers (PBDEs). Extraction and clean-up with n-hexane and concentrated sulphuric acid was followed with analysis by gas chromatography coupled to electron capture (GC-ECD) and GC coupled to negative ion chemical ionisation mass spectrometry (GC-NICI-MS). The advantages of this method rest in the broad range of analytes and its simplicity and robustness, while the use of concentrated sulphuric acid extraction/clean-up destroys viruses that may be present in the samples. Small volumes of reference serum between 50 and 1000 μL were extracted and the limits of detection/quantification and repeatability were determined. Recoveries of spiked compounds for the extraction of small volumes (≥300 μL) of the spiked reference serum were between 90% and 120%. The coefficients of variation of repeatability ranged from 0.1–14%, depending on the compound. Samples of 4-year-old serum and umbilical cord blood (n = 73 and 40, respectively) from a population inhabiting a village near a chloro-alkali plant were screened for the above-mentioned halogenated pollutants using this method and the results are briefly described.
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Acknowledgements
This research was supported by the Instituto de Salud Carlos III. Red de Grupos INMA (G03/176) and projects PI041666 and GRACCIE Consolider Ingenio Network (CSD2007-00067) from the Spanish Ministry of Science and Innovation. M.H. benefited from an EU “Marie Curie” fellowship. We thank the Laboratory of Retrovirology of the University Hospital “Germans Trias i Pujol” (Autonomous University of Barcelona) for access to samples with hepatitis B or the human immunodeficiency viruses and their analysis.
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Grimalt, J.O., Howsam, M., Carrizo, D. et al. Integrated analysis of halogenated organic pollutants in sub-millilitre volumes of venous and umbilical cord blood sera. Anal Bioanal Chem 396, 2265–2272 (2010). https://doi.org/10.1007/s00216-010-3460-y
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DOI: https://doi.org/10.1007/s00216-010-3460-y