Abstract
Recently, covalent organic frameworks have gained popularity in sample pretreatment. However, the application of covalent organic frameworks in the enrichment of hydrophilic compounds remains a challenge. Thus, a functionalized magnetic covalent organic framework equipped with amino groups was constructed using a bottom-up functionalization strategy. Considering the advantages of this novel adsorbent such as high porosity, large adsorption capacity, and hydrophilic surface, a sensitive magnetic solid-phase extraction coupled with high-performance liquid chromatography-tandem mass spectrometry method was established for the effective determination of neonicotinoids. This method exhibited good linearities with correlation coefficients ranging from 0.9983 to 0.9995, low detection limits in the range 0.003–0.009 ng g−1 and 0.001–0.013 ng mL−1, and limits of quantification in the range 0.010–0.031 ng g−1 and 0.004–0.044 ng mL−1. Furthermore, satisfactory repeatability with relative standard deviations ≤ 6.7% and spiked recoveries between 82.3 and 99.8% were obtained. This work not only provided a promising adsorbent for the sensitive determination of trace-level neonicotinoids but also represented a unique insight for effective enrichment of super hydrophilic hazards.
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The data and materials generated during and/or analyzed during the current study are available from the corresponding authors on reasonable request.
Abbreviations
- COFs:
-
Covalent organic frameworks
- POPs:
-
Porous organic polymers
- Fe3O4@TFPA-DAB-NH2 :
-
A functionalized magnetic covalent organic framework equipped with amino groups
- Fe3O4@TFPA-BD:
-
A magnetic covalent organic framework without amino groups
- HPLC:
-
High-performance liquid chromatography
- MS/MS:
-
Triple quadrupole tandem mass spectrometry
- UV:
-
Ultraviolet
- FLD:
-
Fluorescence
- DAD:
-
Diode array detection
- LLE:
-
Liquid-liquid extraction
- DSPE:
-
Dispersive solid-phase extraction
- MSPE:
-
Magnetic solid-phase extraction
- HPLC-MS/MS:
-
High-performance liquid chromatography-tandem mass spectrometry
- MSPE-HPLC-MS/MS:
-
High-performance liquid chromatography-tandem mass spectrometry based on magnetic solid-phase extraction
- NEOs:
-
Neonicotinoids
- FPNs:
-
Fipronils
- AFs:
-
Aflatoxins
- SUs:
-
Sulfonylurea insecticides
- ICL:
-
Imidacloprid
- CTN:
-
Clothianidin
- TCL:
-
Thiacloprid
- ACT:
-
Acetamiprid
- DAB:
-
3,3′-Diaminobenzidine
- TFPA:
-
Tris(4-formylphenyl) amine
- BD:
-
Benzidine
- FeCl3·6H2O:
-
Iron trichloride hexahydrate
- CH3COONa:
-
Sodium acetate anhydrous
- EG:
-
Ethylene glycol
- THF:
-
Tetrahydrofuran
- HAC:
-
Acetic acid
- FA:
-
Formic acid
- AC:
-
Acetone
- MA:
-
Methanol
- EA:
-
Ethanol
- ACN:
-
Acetonitrile
- SEM:
-
Scanning electron microscopy
- TEM:
-
Transmission electron microscope
- FTIR:
-
Fourier transform infrared
- XPS:
-
X-ray photoelectron spectroscopy
- BET:
-
Brunauer-Emmett-Teller
- BJH:
-
Barrett-Joyner-Halenda
- TGA:
-
Thermogravimetric analysis
- DTG:
-
Derivative thermogravimetry
- XRD:
-
X-ray diffraction
- R 2 :
-
Determination coefficient in adsorption isothermal and kinetic experiment
- r:
-
Correlation coefficient
- LODs:
-
Detection limits
- LOQs:
-
Limits of quantification
- RSDs:
-
Relative standard deviations
- ME:
-
Matrix effect
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Acknowledgements
The authors extend their gratitude to Shiyanjia Lab (www.shiyanjia.com) for providing invaluable assistance with all the characterization analysis.
Funding
The study was supported by the National Key Project of Research and Development Plan (2022YFF1100900).
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Xinyue Zhang: conceptualization, methodology, formal analysis, investigation, visualization, writing—original draft, writing—review and editing. Minli Yang: conceptualization, investigation, writing—review and editing. Feng Zhang: supervision, funding acquisition. Xiujuan Wang: investigation, writing—review and editing. Feifang Zhang: supervision, writing—review and editing
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Zhang, X., Yang, M., Zhang, F. et al. Amino-functional magnetic covalent organic framework as an effective adsorbent for the determination of neonicotinoids in food samples. Microchim Acta 191, 220 (2024). https://doi.org/10.1007/s00604-024-06277-5
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DOI: https://doi.org/10.1007/s00604-024-06277-5