Fluorometric determination of fipronil by integrating the advantages of molecularly imprinted silica and carbon quantum dots

Yang, Chunhui; Wang, Lihong; Zhang, Zhen; Chen, Yujie; Deng, Qiling; Wang, Shuo

doi:10.1007/s00604-019-4005-5

Cited by 22 publications

(6 citation statements)

References 29 publications

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“…The potency of the developed method was compared with that of the already existing methods by reviewing the literature. Sorbents such as molecularly imprinted silica, carbon quantum dots (CQD@MIS), 42 and humic acid-bonded silica (HA-SiO 2 ) 43 were considered for comparison with newly synthesized MIPs. Moreover, the QuEChERS method using multiwalled carbon nanotubes 44 and application of organic solvents 45 has also been reported.…”

Section: Resultsmentioning

confidence: 99%

Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Hayat

Manzoor

Raza³

et al. 2022

ACS Omega

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Fipronil, a phenyl pyrazole insecticide, is extensively used in agriculture to control insect infestation. It has the potential to assimilate into the food chain, leading to serious health concerns. We report molecularly imprinted polymer (MIP)-based dispersive solidphase microextraction for the targeted determination of fipronil in milk samples. Designing such a sorbent is of paramount importance for measuring the accurate amount of fipronil for monitoring its permissible limit. Response surface methodology based on a central composite design following a face-centered approach was used to optimize experimental conditions. The maximum binding capacity of 47 mg g −1 was achieved at optimal parameters of time (18 min), temperature (42 °C), pH (7), and analyte concentration (120 mg L −1 ). Under these conditions, a high percentage recovery of 94.6 ± 1.90% (n = 9) and a low limit of detection (LOD) and limit of quantitation (LOQ) (5.64 × 10 −6 and 1.71 × 10 −5 μg mL −1 , respectively) were obtained. The MIP was well characterized through a scanning electron microscope (SEM) as well as Brunauer−Emmett−Teller (BET), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) methods. Adsorption kinetics of the MIP followed the pseudo-first-order model (R 2 0.99 and χ 2 0.96), suggesting the MIP−analyte interaction to be a physiosorptive process, while adsorption isotherms followed the Freundlich model (R 2 0.99). The real sample analysis through high-performance liquid chromatography (HPLC) confirmed the selective determination of fipronil from milk samples.

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Section: Resultsmentioning

confidence: 99%

Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Hayat

Manzoor

Raza³

et al. 2022

ACS Omega

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“…In a study involving fluorescence quenching, fipronil was detected in tap water, milk, and egg samples using carbon quantum dots (CQDs) encapsulated with molecularly imprinted materials. 118 As shown in Figure 6A, CQDs are synthesized through a hydrothermal process and utilized as fluorescent signal transductors for optical recording. Taking 3-aminopropyltriethoxysilane as the functional monomer and tetraethoxysilane as the cross-linking monomer, CQD@MIP was synthesized via a condensation reaction by coating MIPs on the surface of the CQDs.…”

Section: Molecularly Imprinted Polymer Sensorsmentioning

confidence: 99%

“…MIP-based sensors have been widely reported for the determination of pesticide residues, including imidacloprid, azithromycin, chlorpyrifos, organophosphorus, benzimidazoles, and pyrethroids, with electrochemical sensors and magnetic mesoporous and optical sensor-based methods. In a study involving fluorescence quenching, fipronil was detected in tap water, milk, and egg samples using carbon quantum dots (CQDs) encapsulated with molecularly imprinted materials . As shown in Figure A, CQDs are synthesized through a hydrothermal process and utilized as fluorescent signal transductors for optical recording.…”

Section: Emerging Analytical Techniquesmentioning

confidence: 99%

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Immunoassays and Emerging Analytical Techniques of Fipronil and its Metabolites for Food Safety: A Review

Li,

Abd El-Aty,

Jiang

et al. 2024

J. Agric. Food Chem.

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Fipronil, classified as a phenylpyrazole insecticide, is utilized to control agricultural, public health, and veterinary pests. Notably, its unique ecological fate involves degradation to toxic metabolites, which poses the risk of contamination in water and foodstuffs and potential human exposure through the food chain. In response to these concerns, there is a pressing need to develop analytical methodologies for detecting fipronil and its metabolites. This review provides a concise overview of the mode of action, metabolism, and toxicology of fipronil. Additionally, various detection strategies, encompassing antibody-based immunoassays and emerging analytical techniques, such as fluorescence assays based on aptamer/molecularly imprinted polymer/fluorescent probes, electrochemical sensors, and Raman spectroscopy, are thoroughly reviewed and discussed. The focus extends to detecting fipronil and its metabolites in crops, fruits, vegetables, animal-derived foods, water, and bodily fluids. This comprehensive exploration contributes valuable insights into the field, aiming to foster the development and innovation of more sensitive, rapid, and applicable analytical methods.

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“…Some research groups synthesized a new SPE sorbent in the laboratory for fipronil and its metabolites separation. Yang et al [25] used fipronil as the template, 3aminopropyltriethoxysilane as a functional monomer, and tetraethoxysilane as a cross-linker to prepare molecularly imprinted silica for specifical extraction of fipronil in water samples. Dong et al [23] synthesized amino-modified magnetic multi-walled carbon nanotubes as SPE sorbent for the determination of fipronil in different water samples based on UPLC-MS/MS detection.…”

Section: Introductionmentioning

confidence: 99%

Determination of fipronil and its metabolites in environmental water samples by meltblown nonwoven fabric‐based solid‐phase extraction combined with gas chromatography‐electron capture detection

Zhao

Yue

Zhou

et al. 2022

J of Separation Science

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In this study, a new method for the determination of fipronil and its three metabolites in environmental water samples was developed based on meltblown nonwoven fabric solid‐phase extraction combined with gas chromatography‐electron capture detection. As the core material of medical masks, meltblown nonwoven fabric is made of polypropylene superfine fibers which are randomly distributed and bonded together with a relatively large specific surface area and good permeability. Polypropylene as a high molecular hydrocarbon‐based polymer has the characteristics of good hydrophobicity and lipophilicity, which can be applied for the separation and enrichment of hydrophobic substances in food, environment, and biological samples. The meltblown nonwoven fabric is soft and can fill the solid‐phase extraction cartridge tightly. This aspect also makes it suitable to be used as an ideal solid‐phase extraction sorbent. A series of parameters influencing the extraction efficiency were investigated, and under the optimized conditions, fipronil and its three metabolites had a good linear relationship in the range of 0.2–100 μg/L with a correlation coefficient R2 of more than 0.999. The recoveries at three spiked concentrations were in the range of 99.2–107.3% with the relative standard deviations less than 9.8% (intra‐day) and 8.1% (inter‐day). The limit of detection for the four target analytes was in the range of 0.02–0.06 μg/L. Finally, this method was successfully applied in the analysis of fipronil and its three metabolites in various types of environmental water samples.

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Fluorometric determination of fipronil by integrating the advantages of molecularly imprinted silica and carbon quantum dots

Cited by 22 publications

References 29 publications

Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Molecularly Imprinted Polymeric Sorbent for Targeted Dispersive Solid-Phase Microextraction of Fipronil from Milk Samples

Immunoassays and Emerging Analytical Techniques of Fipronil and its Metabolites for Food Safety: A Review

Determination of fipronil and its metabolites in environmental water samples by meltblown nonwoven fabric‐based solid‐phase extraction combined with gas chromatography‐electron capture detection

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