Mixed hemimicelles solid-phase extraction of chlorophenols in environmental water samples with 1-hexadecyl-3-methylimidazolium bromide-coated Fe3O4 magnetic nanoparticles with high-performance liquid chromatographic analysis

Cheng, Qin; Qü, Fei; Li, Nian Bing; Luo, Hong Qun

doi:10.1016/j.aca.2011.12.004

Cited by 96 publications

(47 citation statements)

References 33 publications

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“…Many studies reported in the literature regarding hemimicelles have used acetonitrile containing 1 % (v/v) acetic acid as the elution solvent [31][32][33][34]. Acetic acid decreases the pH of the medium, changing the charge density of the MNP surface and thus inducing desorption of the phenols, being also compatible with the HPLC system.…”

Section: Optimization Of the M-μdspe Proceduresmentioning

confidence: 99%

Double salts of ionic-liquid-based surfactants in microextraction: application of their mixed hemimicelles as novel sorbents in magnetic-assisted micro-dispersive solid-phase extraction for the determination of phenols

et al. 2015

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The use of mixed hemimicelles of ionic liquid (IL)-based surfactants in a magnetic-based micro-dispersive solid-phase extraction (m-μdSPE) approach is described. Not only is the symmetric monocationic IL-based surfactant 1,3-didodecylimidazolium bromide (C12C12Im-Br) studied for first time in m-μdSPE, but double-salt (DS) IL (DSIL)-based surfactants are also examined. Nine DSIL-based surfactants were formed by combination of C12C12Im-Br with other IL-based surfactants, including nonsymmetric monocationic and dicationic ILs combined at three different molar fractions. The analytical application was focused on the determination of a group of eight phenols, including bisphenol A, in water samples. The best results were obtained with the DSIL formed by C12C12Im-Br (molar fraction 0.5) and 1-hexadecyl-3-methylimidazolium bromide (C16MIm-Br), after proper optimization of the overall method in combination with high-performance liquid chromatography (HPLC) and diode-array detection (DAD). The optimum conditions for 100 mL of water samples require a small amount (10 mg) of Fe3O4 magnetic nanoparticles, a low content (5.0 mg of C12C12Im-Br and 3.9 mg of C16MIm-Br) of the selected DSIL, pH 11, a sonication time of 2.5 min, and an equilibration time of 5 min with the aid of NdFeB magnets, followed by elution of phenols, evaporation, and reconstitution with 0.5 mL of acetonitrile. The overall m-μdSPE-HPLC-DAD method is characterized for limits of detection down to 1.3 μg · L(-1), intraday relative standard deviations lower than 13 % (n = 3), and interday relative standard deviations lower than 17 % (n = 9), with a spiking level of 15 μg · L(-1); with enrichment factors between 15.7 and 141, and average relative recoveries of 99.9 %.

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Section: Optimization Of the M-μdspe Proceduresmentioning

confidence: 99%

Double salts of ionic-liquid-based surfactants in microextraction: application of their mixed hemimicelles as novel sorbents in magnetic-assisted micro-dispersive solid-phase extraction for the determination of phenols

et al. 2015

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“…pH is one of the main factors influencing the adsorption behaviour of metal ions because the surface charge of the adsorbent is pH-dependent and also the metal ions exist in different species depending on the pH [4,29]. The effect of pH on adsorption of Cu(II) and Pb(II) on…”

Section: 2effect Of Solution Phmentioning

confidence: 99%

“…The relatively large size of one or both ions in ILs and low symmetry account for the lower melting points of these materials [1][2][3]. ILs have many unique physicochemical properties, such as low vapor pressure, good thermal stability, high conductivity, wide range of viscosities and miscibility with water and organic solvents [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid coated carbon nanospheres as a new adsorbent for fast solid phase extraction of trace copper and lead from sea water, wastewater, street dust and spice samples

Tokalıoğlu

Yavuz

Şahan

et al. 2016

Talanta

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“…The saturation magnetization of the Fe 3 O 4 NPs is 72.81 emu/g, which is consistent with the value of magnetite nanoparticles. 21 The strong magnetization of Fe 3 O 4 NPs makes the NPs sensitive to magnetic fields, which results in the easy and rapid separation of the solid and liquid phases.…”

Section: Fe 3 O 4 Nps Extraction Procedures and Hplc Analysismentioning

confidence: 99%

F3₃O₄ Magnetic Nanoparticles for Cinnamic Acid Extraction from Ramulus Cinnamomi

Huang

Lü

Lai

et al. 2014

J Chinese Chemical Soc

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A facile solid-phase extraction (SPE) method based on bare Fe 3 O 4 magnetic nanoparticles (Fe 3 O 4 NPs) was developed to capture cinnamic acid (CA) from a well-known traditional Chinese medicine, Ramulus cinnamomi, for high performance liquid chromatography (HPLC) analysis. The as-prepared Fe 3 O 4 NPs were characterized via Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). Several parameters that influence CA extraction rate, such as the amount of Fe 3 O 4 NPs, shaking time, methanol content, eluent pH, and elution time, were investigated. The experimental results show that the CA extraction was 86.9% at optimal condition, and the mass yield of CA extraction was found to be 0.00021%. This study demonstrates that the developed CA extraction method is simple, cheap and environmentally friendly. Therefore, the proposed method has a potential for CA separation and purification from complex biological samples.

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Mixed hemimicelles solid-phase extraction of chlorophenols in environmental water samples with 1-hexadecyl-3-methylimidazolium bromide-coated Fe3O4 magnetic nanoparticles with high-performance liquid chromatographic analysis

Cited by 96 publications

References 33 publications

Double salts of ionic-liquid-based surfactants in microextraction: application of their mixed hemimicelles as novel sorbents in magnetic-assisted micro-dispersive solid-phase extraction for the determination of phenols

Double salts of ionic-liquid-based surfactants in microextraction: application of their mixed hemimicelles as novel sorbents in magnetic-assisted micro-dispersive solid-phase extraction for the determination of phenols

Ionic liquid coated carbon nanospheres as a new adsorbent for fast solid phase extraction of trace copper and lead from sea water, wastewater, street dust and spice samples

F3₃O₄ Magnetic Nanoparticles for Cinnamic Acid Extraction from Ramulus Cinnamomi

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Mixed hemimicelles solid-phase extraction of chlorophenols in environmental water samples with 1-hexadecyl-3-methylimidazolium bromide-coated Fe3O4 magnetic nanoparticles with high-performance liquid chromatographic analysis

Cited by 96 publications

References 33 publications

Double salts of ionic-liquid-based surfactants in microextraction: application of their mixed hemimicelles as novel sorbents in magnetic-assisted micro-dispersive solid-phase extraction for the determination of phenols

Double salts of ionic-liquid-based surfactants in microextraction: application of their mixed hemimicelles as novel sorbents in magnetic-assisted micro-dispersive solid-phase extraction for the determination of phenols

Ionic liquid coated carbon nanospheres as a new adsorbent for fast solid phase extraction of trace copper and lead from sea water, wastewater, street dust and spice samples

F33O4 Magnetic Nanoparticles for Cinnamic Acid Extraction from Ramulus Cinnamomi

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F3₃O₄ Magnetic Nanoparticles for Cinnamic Acid Extraction from Ramulus Cinnamomi