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学者姓名:张兰
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A chiral metal-organic framework membrane was constructed through coordination between copper ions and R/S-tryptophan. The membrane exhibits exceptional enantioselectivity towards amino acids (ee value: 99.38%) through synergistic effects of hydrogen bonding and spatial hindrance. This strategy demonstrates the potential of amino acid-based chiral centers for high-performance separation membranes.
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GB/T 7714 | Xu, Jinhua , Zhang, Jinyu , Zhang, Wenmin et al. A chiral MOF membrane for enantioselective amino acid separation [J]. | CHEMICAL COMMUNICATIONS , 2025 , 61 (44) : 8015-8018 . |
MLA | Xu, Jinhua et al. "A chiral MOF membrane for enantioselective amino acid separation" . | CHEMICAL COMMUNICATIONS 61 . 44 (2025) : 8015-8018 . |
APA | Xu, Jinhua , Zhang, Jinyu , Zhang, Wenmin , Xie, Shiye , Zhang, Lan . A chiral MOF membrane for enantioselective amino acid separation . | CHEMICAL COMMUNICATIONS , 2025 , 61 (44) , 8015-8018 . |
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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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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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Background: Boronate affinity chromatography represents a powerful analytical technique for the selective separation and enrichment of biomolecules containing cis-diol moieties, including carbohydrates, glycoproteins, and other cis-dihydroxy compounds. While boronate affinity materials (BAMs) have shown promise in glycosylation-based separation and analysis, their practical application is hindered by non-biocompatible binding pH, low enrichment efficiency for low-abundance samples, non-specific adsorption, and limited loading capacity. To address these limitations, this work focuses on developing flower-like hierarchical porous diboronate affinity materials (FHP-DBAMs) with enhanced binding strength, selectivity, and capacity for cis-diolcontaining biomolecules. Results: FHP-DBAM was synthesized via a facile sol-gel method, using tetrahydroxydiboron as a hydrophilic diboronic acid monomer. The electron-withdrawing nature and hydrophilicity of diboronate affinity mechanism enable FHP-DBAM to operate at lower pH values (pH >= 5), addressing the biocompatibility issue. DFT and experiment calculations confirm the enhanced cis-diol binding affinity of diboronate affinity mechanism Background: Boronate affinity chromatography represents a powerful analytical technique for the selective separation and enrichment of biomolecules containing cis-diol moieties, including carbohydrates, glycoproteins, and other cis-dihydroxy compounds. While boronate affinity materials (BAMs) have shown promise in glycosylation-based separation and analysis, their practical application is hindered by non-biocompatible binding pH, low enrichment efficiency for low-abundance samples, non-specific adsorption, and limited loading capacity. To address these limitations, this work focuses on developing flower-like hierarchical porous diboronate affinity materials (FHP-DBAMs) with enhanced binding strength, selectivity, and capacity for cis-diolcontaining biomolecules. Results: FHP-DBAM was synthesized via a facile sol-gel method, using tetrahydroxydiboron as a hydrophilic diboronic acid monomer. The electron-withdrawing nature and hydrophilicity of diboronate affinity mechanism enable FHP-DBAM to operate at lower pH values (pH >= 5), addressing the biocompatibility issue. DFT and experiment calculations confirm the enhanced cis-diol binding affinity of diboronate affinity mechanism
Keyword :
Biomarker Biomarker Controllable synthesis Controllable synthesis Diboronate affinity mechanism Diboronate affinity mechanism Flower-like hierarchical porous Flower-like hierarchical porous
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GB/T 7714 | Xu, Jinhua , Tang, Minghui , Zhang, Wenmin et al. Controlled synthesis of superhydrophilic flower-like hierarchical porous diboronate affinity materials for capturing biomarkers [J]. | ANALYTICA CHIMICA ACTA , 2025 , 1357 . |
MLA | Xu, Jinhua et al. "Controlled synthesis of superhydrophilic flower-like hierarchical porous diboronate affinity materials for capturing biomarkers" . | ANALYTICA CHIMICA ACTA 1357 (2025) . |
APA | Xu, Jinhua , Tang, Minghui , Zhang, Wenmin , Xie, Shiye , Gu, Qianqian , Zhang, Lan . Controlled synthesis of superhydrophilic flower-like hierarchical porous diboronate affinity materials for capturing biomarkers . | ANALYTICA CHIMICA ACTA , 2025 , 1357 . |
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This study reports the synthesis and application of a flower-like chiral metal-organic framework (CMOF) based on copper ions and tryptophan (Cu(Trp)-CMOF). The Cu(Trp)-CMOF was successfully synthesized at room temperature through a facile method with hexadecyl trimethyl ammonium bromide (CTAB) as a structuredirecting agent. The material exhibits a flower-like morphology with hierarchical porosity and well-defined crystallinity in the monoclinic P21/c space group. Comprehensive characterization revealed that different optical configurations ((R)-type, (S)-type, and (RS)-type) could be selectively obtained by controlling the chirality of tryptophan ligands. The synthesized CMOFs demonstrated excellent performance in two key applications: colorimetric recognition of amino acid enantiomers and separation of volatile organic compounds (VOCs). When used as a chromatographic stationary phase, the CMOF significantly enhanced the separation of challenging structural isomers, particularly improving the resolution (RS) of xylene isomers (RS from 1.03 to 2.62) and ethyltoluene isomers (RS from 4.83 to 9.23) compared to conventional columns. This work provides new insights into the design and application of CMOFs for chiral separation and recognition.
Keyword :
Chiral recognition and separation Chiral recognition and separation Flower-like chiral metal-organic frameworks Flower-like chiral metal-organic frameworks Green synthesis Green synthesis VOCS separation VOCS separation
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GB/T 7714 | Xu, Jinhua , Tang, Minghui , Zhang, Jinyu et al. Green and controlled synthesis of copper-based tryptophan flower-like chiral metal-organic framework for enantioselective recognition and volatile organic compound separation [J]. | JOURNAL OF CHROMATOGRAPHY A , 2025 , 1753 . |
MLA | Xu, Jinhua et al. "Green and controlled synthesis of copper-based tryptophan flower-like chiral metal-organic framework for enantioselective recognition and volatile organic compound separation" . | JOURNAL OF CHROMATOGRAPHY A 1753 (2025) . |
APA | Xu, Jinhua , Tang, Minghui , Zhang, Jinyu , Zhang, Wenmin , Xie, Shiye , Zhang, Lan . Green and controlled synthesis of copper-based tryptophan flower-like chiral metal-organic framework for enantioselective recognition and volatile organic compound separation . | JOURNAL OF CHROMATOGRAPHY A , 2025 , 1753 . |
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Background: Covalent organic frameworks (COFs) have attracted much attention in the field of sample pretreatment due to their high specific surface area, designable pore structures, and excellent stability. However, their weak polarity and low electron cloud density characteristics limit their efficient enrichment of polar and hydrophilic pollutants. Results: This study focused on the trace detection requirements of polar aromatic amines (AAs), which are typical hydrophilic pollutants in foods, and proposed a new carbamide functionalization strategy to modify COFs, aiming to achieve efficient extraction of AAs. By carbamide functionalization, a large number of O-C--O active sites were introduced into COF. Experimental studies indicated that the introduced O-C--O sites can enhance the hydrophilicity of COF and enable hydrogen bonding and electrostatic interactions with AAs. Meanwhile, hydrophilicity and it-it interactions were also involved in the adsorption process. Moreover, carbamide functionalization enhances the stabilities of COF fiber, ensuring its application in solid-phase microextraction (SPME). Based on the modified COF, a SPME-gas chromatography-tandem mass spectrometry (GC-MS/MS) method was developed for AAs detection. The developed method possessed wide linearity (2.0-800.0 ng L-1), good correlation coefficients (0.9988-0.9994) and low detection limits (0.5-1.0 ng L-1). Additionally, this method was successfully applied to the detection of trace AAs in tea beverages, demonstrating favorable recovery rates (83.6-116.8 %) and good repeatability (RSD <= 9.5 %). Significance: This study provided a new idea for the polarity regulation of COFs and the efficient enrichment of hydrophilic pollutants. Meanwhile, it lays a technical foundation for the trace analysis of polar AAs in food and beverages.
Keyword :
Carbamide functionalization Carbamide functionalization Covalent organic framework Covalent organic framework Gas chromatography-tandem mass Gas chromatography-tandem mass Polar aromatic amines Polar aromatic amines spectrometry spectrometry
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GB/T 7714 | Yu, Qidong , Cui, Xueting , Zhang, Wenmin et al. Construction of highly hydrophilic carbamide-linked covalent organic framework for efficient extraction of polar aromatic amines: experiments and theoretical calculations [J]. | ANALYTICA CHIMICA ACTA , 2025 , 1371 . |
MLA | Yu, Qidong et al. "Construction of highly hydrophilic carbamide-linked covalent organic framework for efficient extraction of polar aromatic amines: experiments and theoretical calculations" . | ANALYTICA CHIMICA ACTA 1371 (2025) . |
APA | Yu, Qidong , Cui, Xueting , Zhang, Wenmin , Zhang, Jinyu , Xie, Shiye , Zhang, Lan . Construction of highly hydrophilic carbamide-linked covalent organic framework for efficient extraction of polar aromatic amines: experiments and theoretical calculations . | ANALYTICA CHIMICA ACTA , 2025 , 1371 . |
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Monitoring trace oxygenated polycyclic aromatic hydrocarbons (O-PAHs) in tea infusions is crucial, as long-term consumption of O-PAHs-contaminated tea can harm health. In this work, covalent organic framework (COF) TpBD-(OH)2 coating was fabricated for solid-phase microextraction (SPME) of O-PAHs. The coating contains abundant benzene rings and hydrogen bonding sites (oxygen and nitrogen groups). Density functional theory calculations, electrostatic potential distribution and X-ray photoelectron spectroscopy analysis indicated the COF efficiently adsorbs O-PAHs via van der Waals force, hydrogen bonding, electrostatic force, size matching, and it-it interaction. Under the best SPME conditions, a method for detecting O-PAHs in tea infusions was developed using gas chromatography-tandem mass spectrometry (GC-MS/MS). The method possessed low limit of detection (0.5-1.0 ng L-1), wide linearity (2.0-1000.0 ng L-1) and satisfactory recoveries (82.5 %-117.5 %). Furthermore, the method was used to study the impacts of different roasting methods on O-PAHs contamination, and results showed carbon roasting posed a higher risk.
Keyword :
Covalent organic frameworks coating Covalent organic frameworks coating etry etry Gas chromatography-tandem mass spectrom- Gas chromatography-tandem mass spectrom- Oxygenated polycyclic aromatic hydrocarbons Oxygenated polycyclic aromatic hydrocarbons Tea infusion Tea infusion
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GB/T 7714 | Yu, Qidong , Li, Yiding , Zhang, Wenmin et al. Covalent organic framework coating with abundant hydrogen bonding sites for efficient enrichment and sensitive detection of oxygenated polycyclic aromatic hydrocarbons in tea [J]. | FOOD CHEMISTRY , 2025 , 482 . |
MLA | Yu, Qidong et al. "Covalent organic framework coating with abundant hydrogen bonding sites for efficient enrichment and sensitive detection of oxygenated polycyclic aromatic hydrocarbons in tea" . | FOOD CHEMISTRY 482 (2025) . |
APA | Yu, Qidong , Li, Yiding , Zhang, Wenmin , Cui, Xueting , Xie, Shiye , Zhang, Lan . Covalent organic framework coating with abundant hydrogen bonding sites for efficient enrichment and sensitive detection of oxygenated polycyclic aromatic hydrocarbons in tea . | FOOD CHEMISTRY , 2025 , 482 . |
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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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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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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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