Ionic-liquid-mediated poly(dimethylsiloxane)- grafted carbon nanotube fiber prepared by the sol-gel technique for the head space solid-phase microextraction of methyl tert -butyl ether using GC

Abstract

A headspace solid-phase microextraction method was developed for the preconcentration and extraction of methyl tert-butyl ether. An ionic-liquid-mediated multiwalled carbon nanotube-poly(dimethylsiloxane) hybrid coating, which was prepared by covalent functionalization of multiwalled carbon nanotubes with hydroxyl-terminated poly(dimethylsiloxane) using the sol-gel technique, was used as solid-phase microextraction adsorbent. This innovative fiber exhibited a highly porous surface structure, high thermal stability (at least 320°C) and long lifespan (over 210 uses). Potential factors affecting the extraction efficiency were optimized. Under the optimum conditions, the method LOD (S/N = 3) was 0.007 ng/mL and the LOQ (S/N = 10) was 0.03 ng/mL. The calibration curve was linear in the range of 0.03-200 ng/mL. The RSDs for one fiber (repeatability, n = 5) at three different concentrations (0.05, 1, and 150 ng/mL) were 5.1, 4.2, and 4.6% and for the fibers obtained from different batches (reproducibility, n = 3) were 6.5, 5.9, and 6.3%, respectively. The developed method was successfully applied to the determination of methyl tert-butyl ether in different real water samples on three consecutive days. The relative recoveries for the spiked samples with 0.05, 1, and 150 ng/mL were between 94-104%.

Chromium-Based Polypyrrole/MIL-101 Nanocomposite as an Effective Sorbent for Headspace Microextraction of Methyl tert-Butyl Ether in Soil Samples

“…For further demonstrating the superiority of the developed HS-SPME-GC-FID method with PPy@MIL-101(Cr) nanosorbent, its analytical performances were compared with some similar procedures that are reported in the literature [25][26][27][28][29][30][31][32]. The results are summarized in Table 1.…”

Multiple headspace extraction for gas detection in ionic liquids

“…The gas solubility as well as the mass transport of the gas within the IL differ strongly with the nature of its ions so that the efficiency of gas absorbing processes (e.g. in separation and extraction [4][5][6][7][8][9][10]) or gas involving, catalytic reactions (e.g. hydroformulation [11,12], carbonylation [13][14][15][16][17][18], etc.)…”

Fiber‐in‐tube solid‐phase microextraction of caffeine as a molecular tracer in wastewater by electrochemically deposited layered double hydroxide

“…Hence, there is an ongoing research area for the development of the new coating material for the extraction of different target analytes [2][3][4][5][6]. The basic objective is to develop more stable coatings with high extraction capacity toward the target analytes [7,8].…”