Evaluation of magnetic matrix solid‐phase dispersion for the determination of polychlorinated biphenyls in water samples by gas chromatography with electron capture detection

Abstract

A vortex-assisted magnetic matrix solid-phase dispersion method was proposed for the determination of polychlorinated biphenyls in different matrix water samples by gas chromatography with electron capture detection. Magnetic bamboo charcoal (MBC) was synthesized for the adsorption of polychlorinated biphenyls in water samples. Complete separation of the liquid phase and the solid magnetic bamboo charcoal was easily achieved by using a permanent magnet. Under the optimized conditions, good linearity in the range of 0.006-5.0 μg/L was obtained with regression coefficients (r) higher than 0.9986. Based on a signal-to-noise ratio of 3, limits of detection were found to be 0.001-0.003 μg/L. Relative standard deviations ranged from 2.92 to 6.56%. Relative recoveries were 96.6-111.2% for the spiked wastewater sample and 90.7-104.7% for the spiked lake water sample. All results showed that the proposed method was simple, sensitive, and reliable for the determination of polychlorinated biphenyls in water samples.

Solid‐phase nanoextraction of polychlorinated biphenyls in water and their determination by gas chromatography with electron capture detector

“…Direct methods of analysis are rather challenging due to pretreatment, clean up, sample enrichment, and preconcentration steps. Numerous approaches based on LLE and SPE have been successfully applied for determination of PCBs at trace levels [12][13][14][15][16]. In this field, some attempts have been made on the basis of SPME, in which some adsorbent materials such as graphene-based fibers [17,18], singlewalled carbon nanotubes (SWCNT), and multiwalled carbon nanotubes (MWCNT) [19] have been utilized.…”

Determination of 3,3′,4,4′-Polychlorinated Biphenyls by an Electrochemical Sensor Based on a Methylene Blue Probe

“…Current detection methods for PCBs include gas chromatography (GC), 4,5 Gas chromatography-mass spectrometry (GC-MS) and Gas chromatography-mass spectrometry/mass spectrometry (GC-MS/MS), [6][7][8] bioanalytical techniques, 9,10 and spectral analysis. 11,12 These analytical methods are relatively sensitive and fast, but most of them require expensive equipment and complex sample pretreatment processes, which is unsuitable for extensive and rapid detection.…”