A one-step extraction/clean-up method for determination of PCBs, PBDEs and HBCDs in environmental solid matrices

M. Abou-Elwafa Abdallah, D. Drage, S. Harrad

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

A selective pressurized liquid extraction (S-PLE) method was developed for rapid determination of 3 classes of halogenated organic contaminants in indoor dust, soil and sediment samples. The optimised method used 3:2 v/v n-hexane-dichloromethane for extraction of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecanes (HBCDs). Extraction was performed at 90 °C for 5 min followed by 4 min static time under 1500 psi. Good recoveries of target analytes were obtained after 3 extraction cycles. In-cell cleanup was performed using 10 g of 44% H SO acid silica and 5 g of florisil (secondary fat retainer), while copper powder was used to remove elemental sulfur. The method was validated using NIST SRM2585 and SRM 1941b in addition to an in-house previously characterised soil sample. Measured concentrations of target compounds showed good agreement with the certified values with RSD <20% indicating the good accuracy and precision of the S-PLE method. Clean extracts provided low noise levels resulting in low method detection limits (
Original languageEnglish
Pages (from-to)2279-2287
Number of pages9
JournalEnvironmental Science Processes and Impacts
Volume15
Issue number12
Early online date27 Sep 2013
DOIs
Publication statusPublished - 1 Dec 2013

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