Hing‐Biu Lee1, Thomas E. Peart1
1Environment Canada, National Water Research Institute, Aquatic Ecosystem Protection Branch, 867 Lakeshore Rd, Bington, ON, L7R 4A6, Canada
Tóm tắt
Abstract
Methods have been developed for the determination of bisphenol A (BPA) residues in municipal sewage and sludge samples. BPA in wastewater samples was enriched with a C18 solid-phase extraction cartridge, eluted with acetone, and converted to the pentafluoropropionyl derivative. For sludge samples, BPA was acetylated and extracted with supercritical carbon dioxide. In both cases, BPA-d16 was used as a surrogate to monitor extraction efficiency. Final analyses of derivatized sample extracts were performed by gas chromatography/mass spectrometry operating in the electron impact mode. For water samples, mean recoveries and standard deviations were 89 ± 6, 94 ± 4, and 85 ± 7% at fortification levels of 1, 0.1, and 0.025 μg/L, respectively, with a method detection limit of 0.006 μg/L. For solid waste samples, mean recoveries and standard deviations were 93 ± 5 and 92 ± 6% at fortification levels of 2.5 and 0.25 μg/g, respectively, and the method detection limit was 0.05 μg/g. For the Canadian samples under investigation, concentrations of BPA ranged from 49.9 to 0.031 μg/L in sewage influent and effluent, and from 36.7 to 0.104 μg/g in sludge.
