Fabrication of poly(3,4-ethylenedioxythiophene)-ionic liquid functionalized graphene nanosheets composite coating for headspace solid-phase microextraction of benzene derivatives

Zeolite Socony Mobil-5 ordered mesoporous carbon as a fiber coating for solid-phase microextraction

“…As depicted in Fig. by direct injection of 1.0 µL of the standard solution of the analyte at the same concentration as that in the original water sample); 16,27,40 logK OW is the octanol-water partition coefficient which can serve as an indicator for hydrophobicity. To evaluate the extraction selectivity of the OMC-ZSM-5 coating for analytes, three types of organic compounds, namely n-alkane, PAEs and PAHs, were selected as model analytes and the results are listed in Table 1.…”

“…[5][6][7][8] In principle, SPME is based on the partitioning of the analytes between the sample or the headspace (HS) above the sample and a stationary phase (coating) which is typically immobilized on a fused silica fiber or metal wire. For new fiber coating materials, the porous materials, such as carbon nanotubes (CNTs), 22, 23 graphene, 13,15,16 metal/metal oxide nanoparticles, [24][25][26] and metal-organic frameworks (MOFs), 5,27 have recently intrigued much research interest because of their large specific surface areas and high extraction capacities. 10 To date, physical deposition, [11][12][13] sol-gel technique, 10, 14 chemical bonding, 5,15,16 molecular imprinted technique, 17 electrochemical, 18,19 and electrophoretic depositions, 20,21 have been successfully applied in the preparation of SPME fibers.…”

Carbon-Based Nanomaterials Functionalized with Ionic Liquids for Microextraction in Sample Preparation

“…The facile approaches have the merits of low limits of detection (LODs) (lower than others from previously reported methods), short extraction time and a wide linear range. Additionally, the analytical performances of the new methods are better than those of commercially available fibers, in terms of LODs and EFs [11,14], while the functionalized fibers can be reused with an insignificant decrease in the extraction efficiency [12]. From the studies conducted, it was apparent that the presence of the IL-G composites on the surfaces of the fibers is advantageous and facilitates the improvement of the SPME efficiency, since the resulting fibers combine the advantages of both ILs and G. The comparison of the analytical performances of the experiments, conducted in the absence of the IL or the G, proved that the results are less satisfactory than those in the presence of IL-G, underlining the role of IL.…”

“…This novel type of coating was used to extract phenols from environmental aqueous samples with success. Finally, Wu et al developed a poly(3,4-ethylenedioxythiophene) (PEDOT) coating doped with a GO-IL composite (1-hydroxyethyl-3-methyl imidazolium [NTf 2 ] was the IL used), for SPME purposes [14]. The GO-IL-PEDOT coating was electrodeposited on the surface of the fiber using cyclic voltammetry, and the resulting coating, which had many pores and a wrinkled structure, was improved compared to similar materials, in terms of surface area.…”

Multisensory Systems Based on Nafion Membranes Modified by PEDOT for the Determination of Sulfacetamide in Aqueous Solutions and Pharmaceuticals

“…It has been shown in [7] that the force of hydrophobic interactions of sulfanylamides with PEDOT increases at pH 4 when the sorbate is in the zwitterion form. Composite materials based on PEDOT and graphene nanosheets also demonstrate high effectiveness in the extraction of benzene derivatives that are pollutants from natural waters and wastewaters [8]. Carbon materials (graphite, diamond, soot, CNTs, acetylene, etc.)…”