Imprinted sol–gel electrochemical sensor for the determination of benzylpenicillin based on Fe3O4@SiO2/multi-walled carbon nanotubes-chitosans nanocomposite film modified carbon electrode

Hu, Yufang; Li, Jiaxing; Zhang, Zhaohui; Zhang, Huabin; Luo, Lijuan; Yao, Shouzhuo

doi:10.1016/j.aca.2011.04.054

Cited by 65 publications

(24 citation statements)

References 27 publications

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“…The characteristic diffraction peaks demonstrated the excellent crystalline structure of the Fe 3 O 4 nanoparticles, with peaks observed at 2θ values of 30.11, 35.45, 43.16, 53.39, 57.05, and 62.58°. These data matched well with those reported in the literature . A new broad diffraction peak that appeared at 17.0–20.0° was attributed to the modification with the SiO 2 layer.…”

Section: Resultssupporting

confidence: 91%

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe₃O₄‐SiO₂ nanoparticles based dispersive solid‐phase extraction

Sun

Cang

et al. 2018

J of Separation Science

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As a key representative organism, earthworms can directly illustrate the influence of pesticides on environmental organisms in soil ecosystems. The present work aimed to develop a high-throughput multipesticides residue analytical method for earthworms using solid-liquid extraction with acetonitrile as the solvent and magnetic material-based dispersive solid-phase extraction for purification. Magnetic Fe O nanoparticles were modified with a thin silica layer to form Fe O -SiO nanoparticles, which were fully characterized by field-emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffractometry, and vibrating sample magnetometry. The Fe O -SiO nanoparticles were used as the separation media in dispersive solid-phase extraction with primary secondary amine and ZrO as the cleanup adsorbents to eliminate matrix interferences. The amounts of nanoparticles and adsorbents were optimized for the simultaneous determination of 44 pesticides and six metabolites in earthworms by liquid chromatography with tandem mass spectrometry. The method performance was systematically validated with satisfactory results. The limits of quantification were 20 μg/kg for all analytes studied, while the recoveries of the target analytes ranged from 65.1 to 127% with relative standard deviation values lower than 15.0%. The developed method was subsequently utilized to explore the bioaccumulation of bitertanol in earthworms exposed to contaminated soil, verifying its feasibility for real sample analysis.

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Section: Resultssupporting

confidence: 91%

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe₃O₄‐SiO₂ nanoparticles based dispersive solid‐phase extraction

Sun

Cang

et al. 2018

J of Separation Science

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“…The impedance spectra include a semicircle portion and a linear portion. The linear part at lower frequencies represents the diffusion process, whereas the semicircle portion at higher frequencies corresponds to the electron-transfer limit process, and the diameter of the semicircle indicates the electron transfer resistance (Ret)53. The stepwise construction process of the sensor was characterized by EIS, and the EIS patterns of different electrodes in a solution of 0.1 M KCl containing 5 mM [Fe (CN) 6 ] 4−/3− was recorded.…”

Section: Resultsmentioning

confidence: 99%

Synergetic signal amplification of multi-walled carbon nanotubes-Fe3O4 hybrid and trimethyloctadecylammonium bromide as a highly sensitive detection platform for tetrabromobisphenol A

Zhou

Wang

et al. 2016

Sci Rep

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In this work, we fabricated an electrochemical sensor based on trimethyloctadecylammonium bromide and multi-walled carbon nanotubes-Fe3O4 hybrid (TOAB/MWCNTs-Fe3O4) for sensitive detection of tetrabromobisphenol A (TBBPA). The nanocomposite was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR) techniques. The electrochemical behaviors of TBBPA on TOAB/MWCNTs-Fe3O4 composite film modified glassy carbon electrode (GCE) were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) method. The experimental results indicated that the incorporation of MWCNTs-Fe3O4 with TOAB greatly enhanced the electrochemical response of TBBPA. This fabricated sensor displayed excellent analytical performance for TBBPA detection over a range from 3.0 nM to 1000.0 nM with a detection limit of 0.73 nM (S/N = 3). Moreover, the proposed electrochemical sensor exhibited good reproducibility and stability, and could be successfully applied to detect TBBPA in water samples with satisfactory results.

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“…Biosensing devices have been developed for detection of penicillin antibiotics by use of biosensors (Table 6). We have also included some sensors that detect penicillins but do not have a biological element [39][40][41], but rather use the fact that the penicillins oxidise Fe(III) to Fe(II) which can be measured by the sensor. With regard to the biological element used on the biosensor, enzymes are highly specific and sensitive but may be difficult to use because their instability.…”

Section: Biosensorsmentioning

confidence: 99%

Current bioanalytical methods for detection of penicillins

et al. 2012

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Imprinted sol–gel electrochemical sensor for the determination of benzylpenicillin based on Fe3O4@SiO2/multi-walled carbon nanotubes-chitosans nanocomposite film modified carbon electrode

Cited by 65 publications

References 27 publications

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe₃O₄‐SiO₂ nanoparticles based dispersive solid‐phase extraction

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe₃O₄‐SiO₂ nanoparticles based dispersive solid‐phase extraction

Synergetic signal amplification of multi-walled carbon nanotubes-Fe3O4 hybrid and trimethyloctadecylammonium bromide as a highly sensitive detection platform for tetrabromobisphenol A

Current bioanalytical methods for detection of penicillins

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Imprinted sol–gel electrochemical sensor for the determination of benzylpenicillin based on Fe3O4@SiO2/multi-walled carbon nanotubes-chitosans nanocomposite film modified carbon electrode

Cited by 65 publications

References 27 publications

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe3O4‐SiO2 nanoparticles based dispersive solid‐phase extraction

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe3O4‐SiO2 nanoparticles based dispersive solid‐phase extraction

Synergetic signal amplification of multi-walled carbon nanotubes-Fe3O4 hybrid and trimethyloctadecylammonium bromide as a highly sensitive detection platform for tetrabromobisphenol A

Current bioanalytical methods for detection of penicillins

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High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe₃O₄‐SiO₂ nanoparticles based dispersive solid‐phase extraction

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe₃O₄‐SiO₂ nanoparticles based dispersive solid‐phase extraction