Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2019 Jun 20;9(1):8919.
doi: 10.1038/s41598-019-45186-z.

Preparation of a magnetic graphene/polydopamine nanocomposite for magnetic dispersive solid-phase extraction of benzoylurea insecticides in environmental water samples

Xiaodong Huang  1   2 , Kexin Qiao  2 , Lingyun Li  1 , Guangyang Liu  1 , Xiaomin Xu  1 , Runhua Lu  2 , Haixiang Gao  3 , Donghui Xu  4
Affiliations

Preparation of a magnetic graphene/polydopamine nanocomposite for magnetic dispersive solid-phase extraction of benzoylurea insecticides in environmental water samples

Xiaodong Huang et al. Sci Rep. .

Abstract

A magnetic graphene/polydopamine (MG/PDA) nanocomposite has been prepared and used as sorbent for magnetic dispersive solid-phase extraction (MDSPE) of four benzoylurea insecticides in environmental water samples. The obtained nanocomposites were characterized by transmission electron microscopy, scanning electron microscopy, vibrating sample magnetometry, powder X-ray diffraction, fourier transform infrared spectroscopy, surface area and porosity analysis and thermogravimetric analysis. To investigate the adsorption performance of MG/PDA for target analytes, various parameters affecting the MG/PDA-based MDSPE procedure were optimized. Under the optimal conditions, the established method exhibits good linearity (R2 ≥ 0.9988) in the concentration range 2.5-500 µg L-1. A low limit of detection (0.75 µg L-1, signal/noise = 3:1), a low limit of quantification (2.50 µg L-1, signal/noise = 10:1), and good precision (intraday relative standard deviation ≤3.6%, interday relative standard deviation ≤4.5%) are also achieved. Finally, the simple, fast, and sensitive sample preparation technique was successfully used to determine benzoylurea insecticides in environmental water samples.

PubMed Disclaimer

Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Schematic diagram of the MDSPE procedure with the MG/PDA composite.
Figure 2
Figure 2
TEM images of (A) Fe3O4 and (B) MG. (C) SEM image of MG/PDA.
Figure 3
Figure 3
(A) Magnetic curves of the prepared materials. (B) XRD patterns of (a) Fe3O4, (b) MG, (c) MG/PDA and (d) MG/PDA treated with the developed MDSPE method. (C) FT-IR spectra of the prepared materials. (D) N2 adsorption–desorption isotherms of MG/PDA.
Figure 4
Figure 4
TGA curves of MG/PDA and (a) treated with the developed MDSPE method.
Figure 5
Figure 5
Effect of different parameters on the extraction efficiency of BUIs from water: (A) amount of adsorbent, (B) extraction time, (C) salt concentration, (D) desorption solvent, (E) desorption solvent volume, and (F) desorption time.
Figure 6
Figure 6
Regeneration and reusability of MG/PDA.
Figure 7
Figure 7
Typical chromatograms of blank (a) and spiked water (b) 100 μg L−1; (c) 250 μg L−1) samples from the upper reach of the Tiantang River on the Nangezhuang Enterprise Park.
See this image and copyright information in PMC

References

    1. Yang X, et al. Facile synthesis of multifunctional attapulgite/Fe3O4/polyaniline nanocomposites for magnetic dispersive solid phase extraction of benzoylurea insecticides in environmental water samples. Anal. Chim. Acta. 2016;934:114–121. doi: 10.1016/j.aca.2016.06.027. - DOI - PubMed
    1. Wang J, et al. Porphyrin based porous organic polymer modified with Fe3O4 nanoparticles as an efficient adsorbent for the enrichment of benzoylurea insecticides. Microchim. Acta. 2017;185:36. doi: 10.1007/s00604-017-2542-3. - DOI - PubMed
    1. Matsumura F. Studies on the action mechanism of benzoylurea insecticides to inhibit the process of chitin synthesis in insects: A review on the status of research activities in the past, the present and the future prospects. Pestic. Biochem. Phys. 2010;97:133–139. doi: 10.1016/j.pestbp.2009.10.001. - DOI
    1. Sun R, et al. Benzoylurea chitin synthesis inhibitors. J. Agri. Food Chem. 2015;63:6847–6865. doi: 10.1021/acs.jafc.5b02460. - DOI - PubMed
    1. Olsvik PA, et al. Toxicological assessment of the anti-salmon lice drug diflubenzuron on Atlantic cod Gadus morhua. Dis. Aquat. Organ. 2013;105:27–43. doi: 10.3354/dao02613. - DOI - PubMed

Publication types