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Research progress of novel functional materials in extraction of algal toxins Scopus CSCD PKU
期刊论文 | 2024 , 42 (3) , 225-233 | Chinese Journal of Chromatography (Se Pu)
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Abstract :

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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新型功能材料在藻毒素萃取中的应用进展 CSCD PKU
期刊论文 | 2024 , 42 (03) , 225-233 | 色谱
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Abstract :

藻毒素为有害藻类所产生的次级代谢产物,具有毒性强、种类多和生物蓄积性等特点,对人类健康、水产养殖业以及水生生态系统都会造成严重的威胁,已成为当前全球范围的研究热点。由于藻毒素在样品中的含量很低、样品基质复杂等因素,在仪器分析前进行有效的样品前处理不可或缺。高效的样品前处理技术不但能够减小或去除样品基质对分析的干扰,而且可以实现目标物的富集,增加分析方法的灵敏度与准确性。近年来,固相萃取(SPE)、固相微萃取(SPME)、磁性固相萃取(MSPE)、分散固相萃取(DSPE)、吸管尖端固相萃取(PT-SPE)等样品前处理技术已在藻毒素分离分析领域广受关注。这些前处理技术性能的好坏主要取决于萃取材料的特性。由于藻毒素的理化特性各不相同,在分子尺寸、亲疏水性、电荷等性质上差异较大,合理设计并制备适合藻毒素萃取的材料十分必要。最佳的萃取材料必须实现对藻毒素的可逆吸附,并且最好具有多孔结构和高的比表面积,从而能够提供高的回收率和与藻毒素良好的界面接触。此外,萃取材料还应该在样品溶液、洗脱溶剂、工作pH范围内具有良好的化学稳定性,否则萃取材料可能会溶解或丢失其官能团。本文综述了近十几年来国内外关于藻毒素分析检测研究的主要代表性文献,对新型功能材料在藻毒素萃取过程中的应用进行了梳理归纳,并对其发展前景予以展望。

Keyword :

共价有机骨架 共价有机骨架 分子印迹聚合物 分子印迹聚合物 碳基材料 碳基材料 综述 综述 藻毒素 藻毒素 金属有机骨架 金属有机骨架

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GB/T 7714 方敏 , 吴雅萍 , 张文敏 et al. 新型功能材料在藻毒素萃取中的应用进展 [J]. | 色谱 , 2024 , 42 (03) : 225-233 .
MLA 方敏 et al. "新型功能材料在藻毒素萃取中的应用进展" . | 色谱 42 . 03 (2024) : 225-233 .
APA 方敏 , 吴雅萍 , 张文敏 , 张兰 , 杨振泉 . 新型功能材料在藻毒素萃取中的应用进展 . | 色谱 , 2024 , 42 (03) , 225-233 .
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Controllable synthesis of flower-like hierarchical porous TiO2 at room temperature and its affinity application SCIE
期刊论文 | 2024 , 12 (8) , 2114-2122 | JOURNAL OF MATERIALS CHEMISTRY B
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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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锆基金属有机骨架复合材料用于海水中短裸甲藻毒素的固相萃取
期刊论文 | 2024 , 42 (9) , 819-826 | 色谱
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短裸甲藻毒素(BTX-A)是由有害藻类短裸甲藻产生的次生代谢物,检测海水中的藻毒素可以预测赤潮的发生和增长.将BTX-A含量监测作为赤潮预警的因子之一可以有效提高赤潮预警的准确性,开发一种高效富集海水中BTX-A的样品前处理方法迫在眉睫.研究通过溶剂热法制备了具有较大比表面积(310.9 m2/g)、对BTX-A有较强吸附作用的微米级Zr-MOFs复合材料(SiO2@UiO-66),并将其作为固相萃取(SPE)填料,结合高效液相色谱-串联质谱(HPLC-MS/MS)技术,建立了一种检出限低(3.0 pg/mL)、线性范围宽(10.0~200.0 pg/mL)、重复性良好(RSD≤8.5%,n=6)的海水中 BTX-A的高灵敏检测方法.所建立的分析方法成功用于实际海水样品中BTX-A含量的分析和监测,结合福建省海洋与渔业局所发布的赤潮监测预警信息,可作为赤潮预警因子有效提高赤潮的监测和预警.

Keyword :

固相萃取 固相萃取 短裸甲藻毒素 短裸甲藻毒素 赤潮 赤潮 金属有机骨架 金属有机骨架 高效液相色谱-串联质谱 高效液相色谱-串联质谱

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GB/T 7714 陈宗保 , 谢诗烨 , 刘泳君 et al. 锆基金属有机骨架复合材料用于海水中短裸甲藻毒素的固相萃取 [J]. | 色谱 , 2024 , 42 (9) : 819-826 .
MLA 陈宗保 et al. "锆基金属有机骨架复合材料用于海水中短裸甲藻毒素的固相萃取" . | 色谱 42 . 9 (2024) : 819-826 .
APA 陈宗保 , 谢诗烨 , 刘泳君 , 张文敏 , 方敏 , 张兰 . 锆基金属有机骨架复合材料用于海水中短裸甲藻毒素的固相萃取 . | 色谱 , 2024 , 42 (9) , 819-826 .
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Self-assembled flower-like carbon nanosheets for magnetic solid-phase extraction of microcystins from aquatic organism EI
期刊论文 | 2024 , 1730 | Journal of Chromatography A
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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@ZnO2-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@ZnO2-C has a flower-like layered structure with a large amount of pore space, promoting the rapid diffusion of targets. In addition, Zn2+ doped in MOF precursors was still retained that further produced strong metal chelation with targets. The unique structure of F-Ni@NiO@ZnO2-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 F-Ni@NiO@ZnO2-C was a promising adsorbent, providing great potential for the determination of trace amounts of MCs in biological samples. © 2024 Elsevier B.V.

Keyword :

Carbon Carbon Extraction Extraction High performance liquid chromatography High performance liquid chromatography Mass spectrometry Mass spectrometry Nanosheets Nanosheets Nickel oxide Nickel oxide Organometallics Organometallics Phase separation Phase separation

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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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Thiocarbamide conversion-based nitrogen-rich covalent organic framework coatings for electro-enhanced solid-phase microextraction of bisphenols SCIE
期刊论文 | 2024 , 1727 | JOURNAL OF CHROMATOGRAPHY A
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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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Flexible filament winding strategy to prepare COF@polyionic liquid-coated fibers for non-selective exclusion of macromolecules in electro-enhanced solid-phase microextraction SCIE
期刊论文 | 2024 , 1306 | ANALYTICA CHIMICA ACTA
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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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Hollow microporous organic network fiber membrane for efficient extraction of okadaic acid from marine organisms EI
期刊论文 | 2024 , 1736 | Journal of Chromatography A
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Membrane-based micro-solid phase extraction (M-μSPE) has garnered great attention in sample pretreatment, suffering an inherent contradiction between permeability and adsorption capacity. In this study, a pure microporous organic network (TEB-DIB-MON) fiber membrane was prepared by combining electrostatic spinning technology, Sonogashira-Hagihara reaction and template sacrifice method. The prepared TEB-DIB-MON membrane exhibited a large specific surface area with a hollow and porous structure, thereby providing excellent solvent permeability and high adsorption capacity for okadaic acid (OA, an algal toxin). Under the optimized conditions, a sensitive analytical method was established by coupling M-μSPE with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The established method has a low detection limit (0.5 pg mL−1), a wide linear range (1.5–1000 pg mL−1, R ≥ 0.9991), and good reproducibility (RSD ≤ 9.4 %, n = 6), which was then successfully applied for OA detection in marine organisms. Trace amounts of OA (59.3–89.0 pg mL−1) was detected in the oyster and prawn samples. This work demonstrated that the excellent application potential of MON membranes in sample pretreatment, while also presents a novel synthesis strategy for MONs membranes. © 2024 Elsevier B.V.

Keyword :

Fibrous membranes Fibrous membranes Micropores Micropores Nafion membranes Nafion membranes Spinning (fibers) Spinning (fibers)

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GB/T 7714 Zhang, Wenmin , Liao, Baodi , Xie, Shiye et al. Hollow microporous organic network fiber membrane for efficient extraction of okadaic acid from marine organisms [J]. | Journal of Chromatography A , 2024 , 1736 .
MLA Zhang, Wenmin et al. "Hollow microporous organic network fiber membrane for efficient extraction of okadaic acid from marine organisms" . | Journal of Chromatography A 1736 (2024) .
APA Zhang, Wenmin , Liao, Baodi , Xie, Shiye , Zhang, Lan . Hollow microporous organic network fiber membrane for efficient extraction of okadaic acid from marine organisms . | Journal of Chromatography A , 2024 , 1736 .
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?-Lactamase Sensitive Probe for Rapid Detection of Antibiotic- Resistant Bacteria with Gas Chromatography-Tandem Mass Spectrometry SCIE
期刊论文 | 2023 , 95 (14) , 6098-6106 | ANALYTICAL CHEMISTRY
WoS CC Cited Count: 4
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beta-Lactamase (Bla) produced by bacteria to resist beta-lactam antibiotics is a serious public health threat. Developing efficient diagnostic protocols for drug-resistant bacteria is of great significance. In this work, based on gas molecules in bacteria, a novel research strategy was proposed to develop a gas molecule-based probe by grafting 2-methyl-3-mercaptofuran (MF) onto cephalosporin intermediates via a nucleophilic substitution reaction. The probe can release the corresponding MF by reacting with Bla. The released MF, as a marker of drug-resistant bacteria, was analyzed by headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry. The Bla concentration as low as 0.2 nM can be easily observed, providing an efficient method for detecting enzyme activity and screening drug-resistant strains in vivo. Importantly, the method is universal, and probes with different properties can be prepared by changing different substrates to further identify different types of bacteria, thereby broadening the research methods and ideas for monitoring physiological processes.

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GB/T 7714 Ding, Qingqing , Zhang, Wenmin , Guo, Yuheng et al. ?-Lactamase Sensitive Probe for Rapid Detection of Antibiotic- Resistant Bacteria with Gas Chromatography-Tandem Mass Spectrometry [J]. | ANALYTICAL CHEMISTRY , 2023 , 95 (14) : 6098-6106 .
MLA Ding, Qingqing et al. "?-Lactamase Sensitive Probe for Rapid Detection of Antibiotic- Resistant Bacteria with Gas Chromatography-Tandem Mass Spectrometry" . | ANALYTICAL CHEMISTRY 95 . 14 (2023) : 6098-6106 .
APA Ding, Qingqing , Zhang, Wenmin , Guo, Yuheng , Wang, Juan , Chen, Hui , Zhang, Lan . ?-Lactamase Sensitive Probe for Rapid Detection of Antibiotic- Resistant Bacteria with Gas Chromatography-Tandem Mass Spectrometry . | ANALYTICAL CHEMISTRY , 2023 , 95 (14) , 6098-6106 .
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Room temperature synthesis of flower-like hollow covalent organic framework for efficient enrichment of microcystins SCIE
期刊论文 | 2023 , 13 (7) , 4255-4262 | RSC ADVANCES
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The morphology of nanomaterials is one of essential factors for their unique properties. Herein, a hollow covalent organic framework with a flower-like structure (HFH-COF) was synthesized at room temperature. The synthesized HFH-COF has a very large specific surface area, mesoporous structure, excellent chemical stability, and good crystallinity. The special morphology endowed HFH-COF with high specific surface area utilization and rapid mass transfer rate, resulting in faster equilibration time and better extraction performance than spherical COF (S-COF). Subsequently, combined with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), an efficient and sensitive method was established for microcystins (MCs) detection. The developed method has low detection limits (0.6-0.8 pg mL(-1)), wide linear ranges (1.5-1000.0 pg mL(-1), R >= 0.9993), and acceptable reproducibility (RSD <= 7.6%, n = 6). Real biological samples were analyzed by the developed method, and trace levels of MC-YR, MC-RR and MC-LR were detected. The results indicate that the synthesized HFH-COF is an ideal sorbent for efficient extraction of MCs from complex biological samples.

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GB/T 7714 Yu, Zhenli , Chen, Hui , Zhang, Wenming et al. Room temperature synthesis of flower-like hollow covalent organic framework for efficient enrichment of microcystins [J]. | RSC ADVANCES , 2023 , 13 (7) : 4255-4262 .
MLA Yu, Zhenli et al. "Room temperature synthesis of flower-like hollow covalent organic framework for efficient enrichment of microcystins" . | RSC ADVANCES 13 . 7 (2023) : 4255-4262 .
APA Yu, Zhenli , Chen, Hui , Zhang, Wenming , Ding, Qingqing , Yu, Qidong , Fang, Min et al. Room temperature synthesis of flower-like hollow covalent organic framework for efficient enrichment of microcystins . | RSC ADVANCES , 2023 , 13 (7) , 4255-4262 .
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