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A solid-phase extraction method for analyzing trace amounts of polychlorinated dibenzo-p-dioxins and dibenzofurans in waste water

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Author(s): Deok-Hie Park | Yeu Young Youn | Jaewon Choi | Young-Hee Lim | Hye-Sung Cho

Journal: Mass Spectrometry Letters
ISSN 2233-4203

Volume: 2;
Issue: 1;
Start page: 12;
Date: 2011;
Original page

Keywords: PCDD/F | Waste water | Solid-phase extraction | Method Detection Limit (MDL)

ABSTRACT
The Korean government has regulated emission of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs)in waste water of manufacturing facilities producing chlorinated compounds since 2009. As this regulation is expected to bereinforced in 2013 to 50 pg I-TEQ/L, a large sample volume is required for the analysis of trace amounts of PCDD/Fs in wastewater. Liquid-liquid extraction (LLE) is used to extract PCDD/Fs from aqueous samples; however, its low efficiency makes itinadequate for analyzing large sample volumes. Herein, we present a disk-type solid-phase extraction (SPE) method for the analysisof dioxin at a part per quadrillion level in waste water. This SPE system contains airtight glass covers with a decompressionpump, which enables continuous semi-automated extraction. Small (0.5 L) and large (7 L) samples were extracted using LLE andSPE methods, respectively. The method detection limits (MDLs) were 0.001−0.25 and 0.015−4.1 pg I-TEQ/L for the SPE andLLE methods, respectively. The concentrations of detected congeners with both methods were similar. However, the concentrationsof several congeners that were not detected with the LLE method were quantified using the SPE method
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