Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Abstract

A novel chemically bonded graphene oxide/fused-silica fiber was prepared and applied in solid-phase microextraction of six polycyclic aromatic hydrocarbons from water samples coupled with gas chromatography. It exhibited high extraction efficiency and excellent stability. Effects of extraction time, extraction temperature, ionic strength, stirring rate and desorption conditions were investigated and optimized in our work. Detection limits to the six polycyclic aromatic hydrocarbons were less than 0.08 μg/L, and their calibration curves were all linear (R(2)≥0.9954) in the range from 0.05 to 200 μg/L. Single fiber repeatability and fiber-to-fiber reproducibility were less than 6.13 and 15.87%, respectively. This novel fiber was then utilized to analyze two real water samples from the Yellow River and local waterworks, and the recoveries of samples spiked at 1 and 10 μg/L ranged from 84.48 to 118.24%. Compared with other coating materials, this graphene oxide-coated fiber showed many advantages: wide linear range, low detection limit, and good stability in acid, alkali, organic solutions and at high temperature.

Application of Magnetic Graphene Nanoparticles for Determination of Organophosphorus Pesticides Using Solid-Phase Microextraction

“…Therefore, the coating decides the performance. Until now, a large number of organic and inorganic materials as SPME fiber coatings have been developed and commercialized, such as carbowax/templated resin, polydimethylsiloxane/divinylbenzene, and polyacrylate [4,5]. Commercial SPME fibers are expensive and show some drawbacks and restricts in applications [5][6][7].…”

Application of graphene in analytical sample preparation

“…Xu et al reported the preparation of GO-bonded silica fiber for extracting PAHs from water samples [49]. The preparation procedure was similar to Fig.…”

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

“…Table 3 summarizes G/GO as SPSs used in SPE, SPME, MSPD and SBSE [25,[151][152][153][154][155][156][157][158][159][160][161][162][163][164][165][166][167].…”

“…Like CNTs, there are also a lot of research works about G [151,152,[159][160][161][162]166,167] and magnetic G [146][147][148][149] grafted onto the stainless steel fiber [162,163], functional G {e.g., polypyrrole/ graphene composite-coated fiber [164]} and GO [165] used for SPSs. Usually, G-NPs are derived from deoxidized GO-NPs.…”