Abstract
This study describes the development and validation of a sensitive and reliable method for determination of polybrominated diphenyl ethers (PBDEs) in atmospheric particulate matter using selective pressurized liquid extraction (SPLE) and gas chromatography–mass spectrometry with a negative chemical ionization (GC-NCI-MS). Extraction and clean-up were performed using PLE with 2 g florisil and 3 g silica placed in the extraction cells. Under optimal conditions, 14 PBDEs were extracted at 70 °C using hexane/dichloromethane (50:50, v/v) as solvent. Validation of SPLE returned excellent recoveries for most analytes, with relative standard deviations mostly below 20%. Method detection limits ranged from 0.13 to 15.38 ng·mL−1 for the GC-MS analyses. The method was successfully applied to atmospheric particulate matter of Beijing, where analytes were detected in the range of 182.79 to 468.99 pg·m−3.
Published Version
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