Heteropore covalent organic framework-based composite membrane prepared by in situ growth on non-woven fabric for sample pretreatment of food non-targeted analysis

Wang, Xiaohan; Li, Wei; Jiang, Haiyan; Chen, Yan; Gao, Rong-Zhi; Tang, An‐Na; Kong, De‐Ming

doi:10.1007/s00604-021-04889-9

Cited by 12 publications

(2 citation statements)

References 39 publications

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“…Nanomaterials could be used for the extraction and enrichment of targets in complex matrices due to their small size, large specific surface area, and adjustable surface groups. At present, many types of nanomaterials have been used in sample pretreatment processes, such as carbon-based nanomaterials [43], polydopamine [44], MOFs [45,46], covalent organic frameworks (COFs) [47,48] and so on [49]. So far, researchers have realized that the determination of IMI in complex samples is based on pretreatment and chromatographic analysis (Table 1).…”

Section: Sample Pretreatment and Chromatographic Analysismentioning

confidence: 99%

Recent Advances for Imidacloprid Detection Based on Functional Nanomaterials

Chen¹,

Wang

Liu

et al. 2023

Chemosensors

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Imidacloprid (IMI) has been applied in agricultural production to prevent pests. It is vital to detect IMI residues with high sensitivity for food safety. In general, nanomaterials have driven the development of highly sensitive sensing platforms owing to their unique physical and chemical properties. Nanomaterials play important roles in the construction of high-performance sensors, mainly through sample pretreatment and purification, recognition molecules immobilization, signal amplification, and providing catalytic active sites. This review addresses the advances in IMI sensors based on the combination of nanomaterials and various analytical techniques. The design principles and performance of different chromatographic, electrochemical, and fabricated optical sensors coupled with nanomaterials are discussed. Finally, the challenges and prospects of sensors based on nanomaterials for IMI analysis have also been incorporated.

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Section: Sample Pretreatment and Chromatographic Analysismentioning

confidence: 99%

Recent Advances for Imidacloprid Detection Based on Functional Nanomaterials

Chen¹,

Wang

Liu

et al. 2023

Chemosensors

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“…7 They have also been demonstrated to have good applications in sample pretreatment. 8 To satisfy the application requirements, COFs can be processed with appropriate postmodification and integrated with special functional groups (e.g., amino, mercapto, and carboxyl). Functionalization of COFs enables them to exhibit unique properties.…”

Section: Introductionmentioning

confidence: 99%

Thiophene Functionalized Magnetic Covalent Organic Frameworks For Selective Extraction Of Trace Heavy Metals Followed By ICP-MS Detection

He¹

2023

At.Spectrosc.

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Magnetic covalent organic frameworks (COFs) were prepared using aminated Fe3O4 nanoparticles as the magnetic core and 1,3,5-tris(4-aminophenyl)benzene (TPB) and 2,5-dimethoxyterephthalaldehyde (DMTA) as monomers. The resultant Fe3O4@TPB-DMTP-COF was then post-modified with 3-ethynylthiophene through the "Aza D-A reaction". The Fe3O4@COF-thiophene composite showed a high Brunauer-Emmett-Teller surface area of 898 m 2· g -1 , as well as a high content of S (5.27 w.t.%). Trace mercury (Hg), lead (Pb), and bismuth (Bi) ions were extracted from environmental water samples, followed by inductively coupled plasma mass spectrometry (ICP-MS) detection. Extraction conditions, such as extraction pH, sample volume, adsorbent amount, extraction/desorption time and elution volume, were optimized. Under the optimal conditions, the three heavy metal ions were extracted from 150 mL of aqueous solution within 20 min and eluted with 0.1 mol L -1 HNO3 containing 8% cysteamine hydrochloride within 20 min. The method exhibited a high enrichment factor (188) and wide linear range of 3-5000 ng·L -1 for Hg 2+ /Pb 2+ and 2-2000 for Bi 3+ , with the detection limits of 0.41, 0.97 and 0.47 ng•L -1 , respectively. Furthermore, the reproducibility of the method was evaluated, and the relative standard deviations of Hg 2+ , Pb 2+ and Bi 3+ were found to be 7.5, 6.8 and 6.2% (n = 7, c = 3 ng•L -1 ), respectively. The accuracy of this method was verified by analyzing certified reference materials in environmental water, including GSB 07-1185-2000 (202047), GSB 07-1185-2000 (201239) and BY 400143 (B2003113). The application potential of this method was further evaluated by analyzing real environmental water samples. Target Hg 2+ and Pb 2+ ions concentrations were found to be 4.91 and 62.5 ng•L -1 , respectively, in the East Lake water sample and 10.2 and 103 ng·L -1 , respectively, in the Yangtze River water sample. The recoveries of target three metal ions were found to be 86.1-104 % in the two environmental water samples at three spiked concentration levels.

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2D Covalent Organic Frameworks with Kagome Lattice: Synthesis and Applications

Tu,

Song,

Chen

et al. 2023

Chemistry A European J

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2D covalent organic frameworks with kagome (kgm) topology are a promising class of crystalline frameworks that possess both triangular micropores and hexagonal mesopores. These dual‐pore structures enable kgm COFs to exhibit unique advantages in selective separation, mass transfer, and targeted drug release. However, the synthesis of 2D kgm COFs has been hindered by the reliance on empirical methods. In this review, we systematically summarize the conventional macrocycle‐to‐framework strategy, typical [4+2] co‐polymerization synthetic strategy, and bifunctional molecules self‐condensation approach for constructing 2D kgm COFs. We also survey the factors influencing formation of kgm lattice such as monomer type, solvent polarity, substrate concentration, etc., and highlight the representative examples on targeted synthesis. Additionally, we summarize the applications of 2D kgm COFs and the relationships between structure and performances. Finally, we propose key fundamental perspectives to accelerate the further development of this intriguing material.

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Heteropore covalent organic framework-based composite membrane prepared by in situ growth on non-woven fabric for sample pretreatment of food non-targeted analysis

Cited by 12 publications

References 39 publications

Recent Advances for Imidacloprid Detection Based on Functional Nanomaterials

Recent Advances for Imidacloprid Detection Based on Functional Nanomaterials

Thiophene Functionalized Magnetic Covalent Organic Frameworks For Selective Extraction Of Trace Heavy Metals Followed By ICP-MS Detection

2D Covalent Organic Frameworks with Kagome Lattice: Synthesis and Applications

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