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学者姓名：张兰
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Abstract ：
Cytokinin (CK) is a type of hormone that exists widely in plants and plays a significant role in promoting cell proliferation and division. Developing a rapid and sensitive method for the detection of trace CKs remains challenging. Microporous organic networks (MONs) are novel materials widely used in sample preparation owing to their excellent extraction performance. Therefore, a dispersive solid phase extraction method based on carboxylated microporous organic networks (MON-2COOH), combined with ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) for the detection of four CKs was developed. Upon introducing a carboxyl group into pure MON, the MON-2COOH material had excellent stability, high porosity, and a good dispersion effect, and provided more interaction sites to achieve good adsorption of target compounds. Under the best conditions, the established dSPE-UPLC-MS/MS method had the advantages of low adsorbent dosage (2 mg), low detection limit (1.0-10.0 pg mL-1) and good reproducibility (RSD <= 6.54%, n = 5). Synergistic extraction mechanisms involving pi-pi, hydrogen bonding and hydrophobic interactions were elucidated using both density functional theory calculations and experimental data. This work also confirmed the feasibility of functionalized MONs as satisfactory adsorbents for the enrichment of small organic compounds.
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| GB/T 7714 | Chen, Li , Yu, Tao , Huang, Le et al. Effective extraction of trace cytokinins in plants based on a carboxyl functionalized microporous organic network [J]. | ANALYTICAL METHODS , 2025 , 17 (16) : 3320-3330 . |
| MLA | Chen, Li et al. "Effective extraction of trace cytokinins in plants based on a carboxyl functionalized microporous organic network" . | ANALYTICAL METHODS 17 . 16 (2025) : 3320-3330 . |
| APA | Chen, Li , Yu, Tao , Huang, Le , Lu, Qiaomei , Zhang, Wenmin , Zhang, Lan . Effective extraction of trace cytokinins in plants based on a carboxyl functionalized microporous organic network . | ANALYTICAL METHODS , 2025 , 17 (16) , 3320-3330 . |
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Covalent organic framework (COF) film-based solid-phase extraction (F-SPE) has garnered great attention in sample pretreatment. However, harsh synthesis conditions of COF films have severely hindered their potential applications. In this study, a kind of COF (TPB-DMTP) films were fabricated via a liquid-liquid interfacial synthesis method at a mild condition. The obtained films exhibited excellent extraction performance towards microcystins (MCs, an algal toxin) due to their porous structure, high specific surface area and abundant accessible adsorption sites. Coupled TPB-DMTP films-based F-SPE with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), a sensitive and environment-friendly analytical method was established for MCs detection. Under the optimal conditions, this method possessed wide linear ranges (2.0-800.0 pg mL-1) with good linearity (R >= 0.9991), low limits of detection (0.8-3.0 pg mL-1) and satisfactory precision (RSDs <= 7.1 %), which then successfully applied for MCs detection in actual aquatic organism samples. Trace amounts of MC-RR (42.4 pg mL-1) and MC-YR (14.6 pg mL-1) were detected in the mussels. The results demonstrate the excellent application potential of COF films in sample pretreatment.
Keyword ：
Covalent organic frameworks Covalent organic frameworks Films Films HPLC-MS/MS HPLC-MS/MS Interface-assisted synthesis Interface-assisted synthesis Microcystins Microcystins
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| GB/T 7714 | Zhang, Wenmin , Wang, Zhiyong , Zhang, Lan . Interface-assisted synthesized covalent organic framework film for efficient extraction of microcystins in aquatic organisms [J]. | TALANTA , 2025 , 282 . |
| MLA | Zhang, Wenmin et al. "Interface-assisted synthesized covalent organic framework film for efficient extraction of microcystins in aquatic organisms" . | TALANTA 282 (2025) . |
| APA | Zhang, Wenmin , Wang, Zhiyong , Zhang, Lan . Interface-assisted synthesized covalent organic framework film for efficient extraction of microcystins in aquatic organisms . | TALANTA , 2025 , 282 . |
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Background: Chiral pollutants present significant environmental and health concerns, with neurotoxic amino acid analogs like β-N-methylamino-L-alanine (BMAA) demonstrating enantiomer-specific bioaccumulation in aquatic ecosystems. Current analytical approaches for chiral environmental contaminants rely predominantly on chromatographic techniques that require extensive sample preparation (typically 24 h), limiting field deployment and high-throughput screening capabilities. Detection thresholds for these compounds (0.1–10 μg/L) necessitate sensitive methodologies that maintain stereochemical integrity. This study addresses these analytical challenges through the rational design of chiral cobalt hydroxide (CF–Co(OH)2) nanomaterials engineered for dual-mode detection and separation functionality. Results: A hierarchical porous α-Co(OH)2 with tunable chirality (R/S/RS configurations) and morphologies (square, rough surface, snowflake, flower-like) via micelle-templated growth strategies. The materials demonstrated dual functionality: (1) Rapid colorimetric amino acid discrimination within 5 min with precision (RSD = 4.9 %, n = 6), validated through urinary L-tryptophan quantification (17.1 ± 0.4 μg/mL); (2) Ultrasensitive BMAA separation via SPE-HPLC-MS/MS with significantly improved detection limits (LOD = 0.02 μg/kg) and processing speed (144 × faster than conventional methods). The colorimetric detection mechanism exploits BMAA's ability to form cobalt-amine complexes that produce concentration-dependent yellow coloration, enabling visual detection at 50 μg/kg in freshwater samples. Field testing successfully detected BMAA in crucian carp (0.39 ± 0.03 μg/kg), confirming food-chain biomagnification with excellent recovery (90.1–102.7 %) across diverse matrices. The system's chiral specificity exhibited distinct affinity patterns (BMAA: R–Co(OH)2; DAB: S–Co(OH)2) with 91.4 % enantiomeric excess in just 10 min through configuration-specific 'three-point binding' mechanisms (intramolecular binding energy: 18.7 kcal/mol). Significance: This research establishes morphology-programmable chiral materials as a versatile analytical platform for rapid on-site environmental monitoring and high-throughput toxin analysis. The developed methodology directly addresses World Health Organization guidelines for algal toxin detection in drinking water while providing a generalizable approach for chiral pollutant discrimination in complex environmental and biological samples. © 2025 Elsevier B.V.
Keyword ：
Colorimetric analysis Colorimetric analysis Liquid chromatography Liquid chromatography River pollution River pollution
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| GB/T 7714 | Xu, Jinhua , Zhang, Jinyu , Zhang, Wenmin et al. Controllable synthesis of chiral hierarchical porous Co(OH)2 and its application in rapid chiral recognition and separation [J]. | Analytica Chimica Acta , 2025 , 1364 . |
| MLA | Xu, Jinhua et al. "Controllable synthesis of chiral hierarchical porous Co(OH)2 and its application in rapid chiral recognition and separation" . | Analytica Chimica Acta 1364 (2025) . |
| APA | Xu, Jinhua , Zhang, Jinyu , Zhang, Wenmin , Xie, Shiye , Zhang, Lan . Controllable synthesis of chiral hierarchical porous Co(OH)2 and its application in rapid chiral recognition and separation . | Analytica Chimica Acta , 2025 , 1364 . |
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Algal toxins are secondary metabolites produced by harmful algae ； these metabolites are characterized with strong toxicity, diverse structure and bioaccumulation. Aquatic organisms that feed on harmful algae can accumulate algal toxins in their bodies, and the consumption of these organisms by humans can cause symptoms of paralysis, diarrhea, and even death. The onset of poisoning can occur within as little as 30 min； in many cases, no suitable antidote for algal toxins is available. Thus, algal toxins present significant threats to human health, the aquaculture industry, and aquatic ecosystems. Because the potential risks of algal toxins are a critical issue, these toxins have become a research hotspot. The water environment and various types of aquatic products should be monitored and analyzed to ensure their safety. However, because of possible matrix effects and the low content of algal toxins in actual samples, an efficient pretreatment method is necessary prior to instrumental analyses. Efficient sample pretreatment techniques can not only reduce or eliminate interferences from the sample matrix during analysis but also enrich the target analytes to meet the detection limit of the analytical instrument, thereby ensuring the sensitivity and accuracy of the detection method. In recent years, sample pretreatment techniques such as solid-phase extraction (SPE), solid-phase microextraction (SPME), magnetic SPE (MSPE), dispersive SPE (DSPE), and pipette tip-based SPE (PT-SPE) have gained wide attention in the field of algal-toxin separation and analysis. The performance of these pretreatment techniques largely depends on the characteristics of the extraction materials. Given the diverse physicochemical properties of algal toxins, including their different molecular sizes, hydrophobicity/hydrophilicity, and charges, the design and preparation of materials suitable for algal-toxin extraction is an essential undertaking. The optimal extraction material should be capable of reversible algal-toxin adsorption and preferably possess a porous structure with a large surface area to allow for high recovery rates and good interfacial contact with the toxins. Additionally, the extraction material should exhibit good chemical stability in the sample solution and elution solvent within the working pH range ； otherwise, it may dissolve or lose its functional groups. Many research efforts have sought to develop novel adsorbent materials with these properties in the separation and analysis of algal toxins， focusing on carbon-based materials, metal organic frameworks (MOFs), covalent organic frameworks (COFs), molecularly imprinted polymers (MIPs), and their functionalized counterparts. Carbon-based materials, MOFs, and COFs have advantages such as large surface areas and abundant adsorption sites. These extraction materials are widely used in the separation and analysis of target substances in complex environmental， biological， and food samples owing to their excellent performance and unique microstructure. They are also the main adsorbents used for the extraction of algal toxins. These extraction materials play an essential role in the extraction of algal toxins, but they also present a number of limitations ： (1) Carbon-based materials, MOFs， and COFs have relatively poor selective-adsorption ability towards target substances； (2) Most MOFs are unstable in aqueous solutions and challenging to apply during extraction from water-based sample solutions； (3) COFs mainly consist of lightweight elements, rendering them difficult to completely separate from sample solutions using centrifugal force， which limits their application range； (4) Although MIPs have good selectivity, issues such as template-molecule loss， slow mass-transfer rates， and low adsorption capacity must be addressed. Therefore， the design and preparation of novel functionalized extraction materials specifically tailored for algal toxins and studies on new composite extraction materials are highly desirable. This article collects representative literature from domestic and international research on algal-toxin analysis over the past decade， summarizes the relevant findings， categorizes the applications of novel functional materials in algal-toxin- extraction processes， and provides an outlook on their future development prospects. © (2024), (Zhongguo Kexueyuan - Chinese Academy of Sciences). All Rights Reserved.
Keyword ：
algal toxins algal toxins carbon-based material carbon-based material covalent organic framework (COF) covalent organic framework (COF) metal organic framework (MOF) metal organic framework (MOF) molecularly imprinted polymer molecularly imprinted polymer review review
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| GB/T 7714 | Fang, M. , Wu, Y. , Zhang, W. et al. Research progress of novel functional materials in extraction of algal toxins [J]. | Chinese Journal of Chromatography (Se Pu) , 2024 , 42 (3) : 225-233 . |
| MLA | Fang, M. et al. "Research progress of novel functional materials in extraction of algal toxins" . | Chinese Journal of Chromatography (Se Pu) 42 . 3 (2024) : 225-233 . |
| APA | Fang, M. , Wu, Y. , Zhang, W. , Zhang, L. , Yang, Z. . Research progress of novel functional materials in extraction of algal toxins . | Chinese Journal of Chromatography (Se Pu) , 2024 , 42 (3) , 225-233 . |
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Flower-like particles have attracted much attention due to their efficient surface accessible sites and unique hierarchical porous structure. However, their synthesis is usually challenging and requires complex procedures. Herein, we present a simple method for rapid preparation of flower-like hierarchical porous TiO2 (FHP-TiO2) at room temperature for the first time. This method can accurately control the size of FHP-TiO2 from 150 nm to 400 nm by combining co-assembly and Stober reaction. The formation mechanism and influencing factors of FHP-TiO2 were systematically investigated, and its excellent metal oxide affinity was confirmed by theoretical calculations. Due to its hierarchical porous structure, large surface area and high specificity performance, FHP-TiO2 served as an appealing restricted-access adsorbent for specific and efficient enrichment of molecules with phosphate groups in a complex sample matrix, thereby realizing the quantitative analysis of these important biomolecules by coupling with high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Moreover, compared with other morphologies (rough surface, and hollow dendritic and mesoporous structure) of TiO2 and flower-like SiO2, FHP-TiO2 showed the best affinity binding ability. This research not only presents a novel approach for tunable room-temperature synthesis of FHP-TiO2 with different sizes, but also expands the application of FHP-TiO2 as an appealing sample-enricher for food safety monitoring and early disease diagnosis.
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| GB/T 7714 | Xu, Jinhua , Zhang, Wenmin , Chen, Hui et al. Controllable synthesis of flower-like hierarchical porous TiO2 at room temperature and its affinity application [J]. | JOURNAL OF MATERIALS CHEMISTRY B , 2024 , 12 (8) : 2114-2122 . |
| MLA | Xu, Jinhua et al. "Controllable synthesis of flower-like hierarchical porous TiO2 at room temperature and its affinity application" . | JOURNAL OF MATERIALS CHEMISTRY B 12 . 8 (2024) : 2114-2122 . |
| APA | Xu, Jinhua , Zhang, Wenmin , Chen, Hui , Ding, Qingqing , Xie, Shiye , Zhang, Lan . Controllable synthesis of flower-like hierarchical porous TiO2 at room temperature and its affinity application . | JOURNAL OF MATERIALS CHEMISTRY B , 2024 , 12 (8) , 2114-2122 . |
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Background: Domoic acid (DA) is a neurotoxic compound causing amnesic shellfish poisoning, secreted by red algae and diatoms. As a glutamate analogue, DA accumulates in filter-feeding marine organisms, posing significant health risks to humans upon consumption. Detecting DA in marine environments remains challenging due to its low concentration and interference from complex matrices. Effective detection and removal require materials with high efficiency and selectivity, which traditional inorganic ionic materials lack due to their limited adsorption capacity and selectivity. Ionic covalent organic frameworks (iCOFs) expected to become highly efficient DA adsorbents due to tunable ionic sites. Results: Thus, a zwitterionic covalent organic nanosheet (TGDB-iCONs) was synthesized to selectively capture DA. TGDB-iCONs was prepared by one-step Schiff-base reaction of the charged monomer triaminoguanidine hydrochloride. It uniformly distributed positively charged guanidinium and negatively charged chloride ions on the surface, forming zwitterionic binding sites. The self-peeling of TGDB-iCONs facilitated the exposure of activesites and improved the adsorption efficiency. Several binding forces were generated between TGDB-iCONs and DA, including complementary electrostatic hydrophilic interactions, which were verified by density functional theory (DFT) calculation. TGDB-iCONs exhibited ultra-fast adsorption kinetics (7 min) and relatively high adsorption capacity (66.48 mg/g) for DA. Furthermore, TGDB-iCONs exhibit strong salt resistance, which is attributed to the charge "shielding" effect of the zwitterionic ions present in TGDB-iCONs. TGDB-iCONs could highly selectively enrich DA and detect trace DA from marine environment including seawater, algae and marine organisms and the limit of detection as low as 0.3 ng/kg. Significance and novelty: This comprehensive study not only sheds light on the vast potential of ionic covalent organic frameworks nanosheets (iCONs) in supporting early warning, control, and traceability of DA, but also lays a solid foundation for future research endeavors aimed at designing and harnessing the unique properties of iCONs.
Keyword ：
Domoic acid Domoic acid Selective capture Selective capture Theoretical calculation verification Theoretical calculation verification Zwitterionic covalent organic nanosheet Zwitterionic covalent organic nanosheet
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| GB/T 7714 | Xu, Jinhua , Yu, Zhenli , Zhang, Wenmin et al. Zwitterionic covalent organic nanosheets for selective analysis of domoic acid in marine environment [J]. | ANALYTICA CHIMICA ACTA , 2024 , 1331 . |
| MLA | Xu, Jinhua et al. "Zwitterionic covalent organic nanosheets for selective analysis of domoic acid in marine environment" . | ANALYTICA CHIMICA ACTA 1331 (2024) . |
| APA | Xu, Jinhua , Yu, Zhenli , Zhang, Wenmin , Xie, Shiye , Liao, Baodi , Zhang, Lan . Zwitterionic covalent organic nanosheets for selective analysis of domoic acid in marine environment . | ANALYTICA CHIMICA ACTA , 2024 , 1331 . |
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Adsorbents with good dispersibility and high efficiency are crucial for magnetic solid-phase extraction (MSPE). In this study, flower-like magnetic nanomaterials (F-Ni@NiO@ZnO 2-C) were successfully prepared by calcination of metal-organic framework (MOF) precursors that was stacked by two-dimensional (2D) nanosheet. The synthesized F-Ni@NiO@ZnO 2-C has a flower-like layered structure with a large amount of pore space, promoting the rapid diffusion of targets. In addition, Zn 2+ doped in MOF precursors was still retained that further produced strong metal chelation with targets. The unique structure of F-Ni@NiO@ZnO 2-C was used as MSPE adsorbent, and combined with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) for extraction of three microcystins (MCs) detection, including microcystin-LR (MC-LR), microcystin-RR (MC-RR), microcystin-YR (MC-YR). The resulting method has a detection limit of 0.2 -1.0 pg mL-1 , a linear dynamic range of 0.6 -500.0 pg mL-1 and has good linearity ( R >= 0.9996). Finally, the established method was applied to the highly selective enrichment of MCs in biological samples, successfully detecting trace amounts of MCs (8.4 -15.0 pg mL-1 ) with satisfactory recovery rates (83.7 -103.1 %). The results indicated that flower-like magnetic FNi@NiO@ZnO 2-C was a promising adsorbent, providing great potential for the determination of trace amounts of MCs in biological samples.
Keyword ：
Carbon material Carbon material HPLC-MS/MS HPLC-MS/MS Magnetic solid phase extraction Magnetic solid phase extraction Metal organic framework Metal organic framework Microcystins Microcystins
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| GB/T 7714 | Xie, Shiye , Liao, Baodi , Yu, Jing et al. Self-assembled flower-like carbon nanosheets for magnetic solid-phase extraction of microcystins from aquatic organism [J]. | JOURNAL OF CHROMATOGRAPHY A , 2024 , 1730 . |
| MLA | Xie, Shiye et al. "Self-assembled flower-like carbon nanosheets for magnetic solid-phase extraction of microcystins from aquatic organism" . | JOURNAL OF CHROMATOGRAPHY A 1730 (2024) . |
| APA | Xie, Shiye , Liao, Baodi , Yu, Jing , Zhang, Wenmin , Chen, Hui , Xu, Jinhua et al. Self-assembled flower-like carbon nanosheets for magnetic solid-phase extraction of microcystins from aquatic organism . | JOURNAL OF CHROMATOGRAPHY A , 2024 , 1730 . |
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Red tides are a type of natural marine disaster caused by harmful algae characterized by a high toxicity, wide distribution, and long duration. Since the concentration of algal toxins in seawater increases with the occurrence of red tides, algal toxins detected in seawater could be used to predict the occurrence and evolution of red tides. Brevetoxin-A (BTX-A) is a secondary metabolite produced by the harmful algae Karenia brevis, whose detection in seawater could form the basis of an accurate warning system for incoming red tides. However, due to the inherent complexity of the seawater matrix and the extremely low levels of BTX-A in seawater, the use of instruments for its direct detection is difficult. Therefore, there is an urgent need to develop a sample pretreatment method for the efficient enrichment of BTX-A in seawater. In this study, a metal-organic backbone material (UiO-66) and its composite with silica microspheres (SiO2@UiO-66) were successfully synthesized using the solvothermal method. The prepared SiO2@UiO-66 exhibited good hydrophilicity, water stability, and large specific surface area. Furthermore, it also exhibited hydrogen bonding and electrostatic interactions with BTX-A, had a strong affinity for BTX-A, and was able to efficiently adsorb BTX-A in complex matrices. Therefore, SiO2@UiO-66 showed potential as a novel packing material for the extraction of BTX-A from solid phase extraction columns. Combined with high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), a highly sensitive detection method for the determination of BTX-A in marine water was established. The established analytical method had a low detection limit (3.0 pg/mL), a wide linear range (10.0 -200.0 pg/mL), and a good linear relationship (R=0.9992). Combined with the Fujian Province Red Tide Monitoring and Early Warning Information 2021 issued by the Fujian Provincial Oceanic and Fisheries Bureau, the analytical method established herein was successfully applied to analyze and monitor the content of BTX-A in actual seawater samples. This highlights the proposed system's potential for use as an early warning factor in the monitoring of red tides, representing a simple and fast pretreatment methodology for the detection of BTX-A in seawater.
Keyword ：
brevetoxin-A brevetoxin-A high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) metal-organic frameworks (MOFs) metal-organic frameworks (MOFs) red tide red tide solid phase extraction (SPE) solid phase extraction (SPE)
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| GB/T 7714 | Chen, Z.-B. , Xie, S.-Y. , Liu, Y.-J. et al. Zirconium-based metal-organic framework composites for solid phase extraction of brevetoxin-A from seawater [J]. | Se pu = Chinese journal of chromatography , 2024 , 42 (9) : 819-826 . |
| MLA | Chen, Z.-B. et al. "Zirconium-based metal-organic framework composites for solid phase extraction of brevetoxin-A from seawater" . | Se pu = Chinese journal of chromatography 42 . 9 (2024) : 819-826 . |
| APA | Chen, Z.-B. , Xie, S.-Y. , Liu, Y.-J. , Zhang, W.-M. , Fang, M. , Zhang, L. . Zirconium-based metal-organic framework composites for solid phase extraction of brevetoxin-A from seawater . | Se pu = Chinese journal of chromatography , 2024 , 42 (9) , 819-826 . |
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Background: Accurate quantitative analysis of small molecule metabolites in biological samples is of great significance. Hydroxypolycyclic aromatic hydrocarbons (OH-PAHs) are metabolic derivatives of emerging pollutants, reflecting exposure to polycyclic aromatic hydrocarbons (PAHs). Macromolecules such as proteins and enzymes in biological samples will interfere with the accurate quantification of OH-PAHs, making direct analysis impossible, requiring a series of complex treatments such as enzymatic hydrolysis. Therefore, the development of matrix-compatible fiber coatings that can exclude macromolecules is of great significance to improve the ability of solid-phase microextraction (SPME) technology to selectively quantify small molecules in complex matrices and achieve rapid and direct analysis. Results: We have developed an innovative coating with a stable macromolecular barrier using electrospinning and flexible filament winding (FW) technologies. This coating, referred to as the hollow fibrous covalent organic framework@polyionic liquid (F-COF@polyILs), demonstrates outstanding conductivity and stability. It accelerates the adsorption equilibrium time (25 min) for polar OH-PAHs through electrically enhanced solid -phase microextraction (EE-SPME) technology. Compared to the powder form, F-COF@polyILs coating displays effective non -selective large -size molecular sieving. Combining gas chromatography -tandem triple quadrupole mass spectrometry (GC-MS/MS), we have established a simple, efficient quantitative analysis method for OH-PAHs with a low detection limit (0.008-0.05 ng L-1), wide linear range (0.02-1000 ng L-1), and good repeatability (1.0%-7.3 %). Experimental results show that the coated fiber exhibits good resistance to matrix interference (2.5%-16.7 %) in complex biological matrices, and has been successfully used for OH-PAHs analysis in human urine and plasma. Significance: FW technology realizes the transformation of the traditional powder form of COF in SPME coating to a uniform non -powder coating, giving its ability to exclude large molecules in complex biological matrices. A method for quantitatively detecting OH-PAHs in real biological samples was also developed. Therefore, the filament winding preparation method for F-COF@polyILs coated fibers, along with fibrous COFs' morphology control, has substantial implications for efficiently extracting target compounds from complex matrices.
Keyword ：
Covalent organic frameworks Covalent organic frameworks Filament winding Filament winding GC-MS GC-MS Monohydroxy polycyclic aromatic hydrocarbons Monohydroxy polycyclic aromatic hydrocarbons Solid phase microextraction Solid phase microextraction
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| GB/T 7714 | Wang, Jingyi , Zhang, Wenmin , Ding, Qingqing et al. Flexible filament winding strategy to prepare COF@polyionic liquid-coated fibers for non-selective exclusion of macromolecules in electro-enhanced solid-phase microextraction [J]. | ANALYTICA CHIMICA ACTA , 2024 , 1306 . |
| MLA | Wang, Jingyi et al. "Flexible filament winding strategy to prepare COF@polyionic liquid-coated fibers for non-selective exclusion of macromolecules in electro-enhanced solid-phase microextraction" . | ANALYTICA CHIMICA ACTA 1306 (2024) . |
| APA | Wang, Jingyi , Zhang, Wenmin , Ding, Qingqing , Xu, Jinhua , Yu, Qidong , Zhang, Lan . Flexible filament winding strategy to prepare COF@polyionic liquid-coated fibers for non-selective exclusion of macromolecules in electro-enhanced solid-phase microextraction . | ANALYTICA CHIMICA ACTA , 2024 , 1306 . |
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Design and preparation of fiber coatings with excellent electrochemical performance and high polarity is significant for efficient extraction of polar targets in electro-enhanced solid-phase microextraction (EE-SPME). In this work, a combination strategy for structure regulation of covalent organic framework (COF) was proposed to fabricate a nitrogen-rich thiocarbamide linked COF coating (Thiocarbamide-TZ-DHTP) via molecular design and post-synthetic thiocarbamide conversion. The prepared COF coating possesses a large number of O, N, and S functional groups, which not only endow the coating with higher polarity but also significantly enhance its electrochemical performance. The COF coating was used for EE-SPME of polar bisphenols (BPs), demonstrating excellent enrichment efficiency and durability. Subsequently, coupled with gas chromatography-tandem mass spectrometry (GC-MS/MS), a sensitive method was developed for determination of trace BPs. The established method possess wide linear ranges (2.0 -800.0 ng L -1 ), good correlation coefficients (0.9985 -0.9994) and low detection limits (0.1 -2.0 ng L -1 ). Moreover, the established method had been successfully applied to detection of trace BPs in tea beverage with satisfactory recoveries (81.6 % to 118.6 %). This research provides a feasible pathway for preparing COF coating with excellent electrochemical performance and high polarity for EE-SPME.
Keyword ：
Bisphenols Bisphenols Covalent organic frameworks Covalent organic frameworks Enhanced solid-phase microextraction Enhanced solid-phase microextraction etry etry Gas chromatography-tandem mass spectrom Gas chromatography-tandem mass spectrom
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| GB/T 7714 | Yu, Qidong , Zhang, Wenmin , Wang, Jingyi et al. Thiocarbamide conversion-based nitrogen-rich covalent organic framework coatings for electro-enhanced solid-phase microextraction of bisphenols [J]. | JOURNAL OF CHROMATOGRAPHY A , 2024 , 1727 . |
| MLA | Yu, Qidong et al. "Thiocarbamide conversion-based nitrogen-rich covalent organic framework coatings for electro-enhanced solid-phase microextraction of bisphenols" . | JOURNAL OF CHROMATOGRAPHY A 1727 (2024) . |
| APA | Yu, Qidong , Zhang, Wenmin , Wang, Jingyi , Xie, Shiye , Liao, Baodi , Chen, Hui et al. Thiocarbamide conversion-based nitrogen-rich covalent organic framework coatings for electro-enhanced solid-phase microextraction of bisphenols . | JOURNAL OF CHROMATOGRAPHY A , 2024 , 1727 . |
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