title: Occurrence of polychlorinated naphthalenes, polychlorinated biphenyls and short-chain chlorinated paraffins in marine sediments from Barcelona (Spain).
abstract: Polychlorinated naphthalenes (PCNs), short-chain chlorinated paraffins (SCCPs) and polychlorinated biphenyls (PCBs) were analysed in marine sediment samples collected from the coastal area of Barcelona (Spain) and near of a submarine emissary coming from a waste water treatment plant located at the mouth of the Besòs River (Barcelona). An integrated sample treatment based on Soxhlet extraction followed by a simple clean-up with Florisil and graphitized carbon cartridge was employed. Gas chromatography coupled to ion-trap tandem mass spectrometry (GC-MS/MS) and gas chromatography-mass spectrometry in electron capture negative ionization mode, were used for PCN and SCCP determinations, respectively, while for PCB analysis gas chromatography with electron capture detection (GC-ECD) was used. The method developed provided low limits of detection (0.001-0.003 ng g(-1) dry weight (dw) for PCNs, 1.8 ng g(-1) for SCCPs and 0.006-0.014 ng g(-1)dw for PCBs) and good run-to-run precisions (lower than RSD 8%) for the analysis of sediment samples. Concentration levels ranging from 0.17 to 3.27 ng g(-1)dw for PCNs, between 0.21 and 1.17 microg g(-1)dw for SCCPs, and from 2.33 to 44.00 ng g(-1) (dw) for PCBs, were found in the coastal sediments, while for samples collected near to the submarine emissary higher levels (from 2.02 to 6.56 ng g(-1)dw for PCNs, between 1.25 and 2.09 microg g(-1)dw for SCCPs and from 22.34 to 37.74 ng g(-1)dw for PCBs) were obtained. The results obtained provide new data about the occurrence of PCN and SCCP in the coastal area of Barcelona.
authors.affiliation: Departament de Química Analítica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Castells
authors.forename: J
authors.initials: J
authors.lastname: Parera
authors.forename: F J
authors.initials: FJ
authors.lastname: Santos
authors.forename: M T
authors.initials: MT
authors.lastname: Galceran
mesh_terms: D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D006843:Hydrocarbons, Chlorinated / Q000032:analysis / Q000737:chemistry; D009281:Naphthalenes / Q000032:analysis* / Q000737:chemistry; D010232:Paraffin / Q000032:analysis* / Q000737:chemistry; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000737:chemistry; D012623:Seawater / Q000032:analysis; D013030:Spain; D053719:Tandem Mass Spectrometry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry
chemical_list: D006843:Hydrocarbons, Chlorinated; D009281:Naphthalenes; D014874:Water Pollutants, Chemical; D010232:Paraffin; D011078:Polychlorinated Biphenyls