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Multiwalled Carbon Nanotubes Coated Fibers for Solid-Phase Microextraction of Polybrominated Diphenyl Ethers in Water and Milk Samples Before Gas Chromatography With Electron-Capture Detection

Multiwalled Carbon Nanotubes Coated Fibers for Solid-Phase Microextraction of Polybrominated Diphenyl Ethers in Water and Milk Samples Before Gas Chromatography With Electron-Capture Detection

Jun-Xia Wang, Dong-Qing Jiang, Zhi-Yuan Gu, Xiu-Ping Yan

J Chromatogr A. 2006 Dec 22;1137(1):8-14.

PMID: 17055524

Abstract:

Determination of polybrominated diphenyl ethers (PBDEs) in environmental samples has raised great concerns due to the widespread use of PBDEs and their potential risk to humans. Solid-phase microextraction (SPME) is a fast, simple, cost-effective, and green sample preparation technique and is widely used for environmental analysis, but reports on the application of SPME for determination of PBDEs are very limited, and only a few publications dealing with commercial SPME fibers are available for extraction of PBDEs. Herein, we report a novel SPME method using multiwalled carbon nanotubes (MWCNTs) as the SPME fiber coating for gas chromatography with electron-capture detection (GC-ECD) of PBDEs in environmental samples. The MWCNTs coating gave much higher enhancement factors (616-1756) than poly (5% dibenzene-95% dimethylsiloxane) coating (139-384) and activated carbon coating (193-423). Thirty-minute extraction of 10 mL of sample solution using the MWCNTs coated fiber for GC-ECD determination yielded the limits of detection of 3.6-8.6 ng L(-1) and exhibited good linearity of the calibration functions (r(2)>0.995). The precision (RSD%, n=4) for peak area and retention time at the 500 ng L(-1) level was 6.9-8.8% and 0.6-0.9%, respectively. The developed method was successfully applied for the analysis of real samples including local river water, wastewater, and milk samples. The recovery of the PBDEs at 500 ng L(-1) spiked in these samples ranged from 90 to 119%. No PBDEs were detected in the river water and skimmed milk samples, whereas in the wastewater sample, 134-215 ng L(-1) of PBDEs were found. The PBDEs were detected in all whole fat milk samples, ranging from 13 to 484 ng L(-1). In a semiskimmed milk sample, only BDE-47 was found at 21 ng L(-1).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP147217796	BDE No 36 solution		147217-79-6	Price

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