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Oriented-aptamer encoded magnetic nanosensor with laser-induced fluorescence for ultrasensitive test of okadaic acid SCIE
期刊论文 | 2024 , 266 | TALANTA
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Abstract :

Okadaic acid (OA) biotoxin acts a well-established inhibitor of protein phosphatase even a tumor promoter of human being, arouse great attention in safety monitoring. However, the powerful and convenient nanosensing technologies for addressing the demands such as rapidity, high sensitivity, and stability in the in-field test of OA shellfish toxin is still scarce. Herein, a high-performance magnetic biometric nanosensor (MBNS) integrating oriented aptamers and ultrasensitive laser-induced fluorescence (LIF) was firstly proposed for the in-field detection of trace OA in seafoods. High-density aptamers hybridized with FAM-labeled cDNA were tethered to the surface of AuNPs on magnetic MIL-101@Fe3O4, and then finely regulated by mercaptohexyl alcohol (MCH) to be orderly assembled, as was successfully utilized to engineer an active biological nanosensor for highly specific recognition of OA. Aptamers anchored on magnetic Fe3O4@MOF@AuNPs activate a biometric micro -reactor of OA, in which the superior LIF properties, conformation regulation of aptamer, and the specific recognition using aptamer genes were adopted. The magnetic nanosensor with an excellent specificity and super sensitivity for OA analysis was achieved within 20 min. Moreover, the content of captured OA could facilely be recorded by measuring the fluorescence intensity, and the limit of detection (LOD) and limit of quantitation of OA (LOQ) reached 0.015 and 0.050 ng/mL respectively, which was far better than most aptamer-based biometric sensing methods. The feasibility for accurate test of trace OA toxin in the fortified shellfish samples was validated with the recovery yields of 88.2-107.5% and RSD of 0.5-7.6%, respectively. The result demonstrated that the oriented-aptamer encoded MNS had significant practical values in rapid and ultrasensitive detection of OA biotoxin and the related safety applications.

Keyword :

Laser-induced fluorescence Laser-induced fluorescence Magnetic nanosensor Magnetic nanosensor Okadaic acid Okadaic acid Oriented aptamer Oriented aptamer Ultrasensitive test Ultrasensitive test

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GB/T 7714 Zhou, Yuwei , Chen, Qingai , Huang, Guobin et al. Oriented-aptamer encoded magnetic nanosensor with laser-induced fluorescence for ultrasensitive test of okadaic acid [J]. | TALANTA , 2024 , 266 .
MLA Zhou, Yuwei et al. "Oriented-aptamer encoded magnetic nanosensor with laser-induced fluorescence for ultrasensitive test of okadaic acid" . | TALANTA 266 (2024) .
APA Zhou, Yuwei , Chen, Qingai , Huang, Guobin , Huang, Shukun , Lin, Chenchen , Lin, Xucong et al. Oriented-aptamer encoded magnetic nanosensor with laser-induced fluorescence for ultrasensitive test of okadaic acid . | TALANTA , 2024 , 266 .
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Oriented-aptamer encoded magnetic nanosensor with laser-induced fluorescence for ultrasensitive test of okadaic acid EI
期刊论文 | 2024 , 266 | Talanta
Oriented-aptamer encoded magnetic nanosensor with laser-induced fluorescence for ultrasensitive test of okadaic acid Scopus
期刊论文 | 2024 , 266 | Talanta
Remodel the perifollicular microenvironment via Minoxidil-loaded microneedle patch and cold atmospheric plasma for treating androgenetic alopecia SCIE CSCD
期刊论文 | 2024 , 17 (7) , 6411-6419 | NANO RESEARCH
WoS CC Cited Count: 2
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Abstract :

Androgenetic alopecia (AGA) is a chronic and progressive form of hair loss characterized by vascular degeneration in the perifollicular microenvironment, leading to cell apoptosis and eventual loss of hair follicles (HFs). Traditional therapeutic formulations, such as Minoxidil (MXD) tincture, have limitations in reshaping the perifollicular microenvironment and exhibit limited effectiveness. Here, we report a multi-synergistic therapeutic platform for high-performance hair regeneration therapy. The platform combines microneedle (MN) patches loaded with MXD-encapsulated nanostructured lipid carriers (MXD-NLC-MNs) and cold atmospheric plasma (CAP). The MNs' mechanical strength enables efficient transdermal delivery of MXD to the targeted dermal papilla cells, promoting cell proliferation. Furthermore, in collaboration with MXD, the mechanical stimulation exerted by MN application synergistically upregulates the expression of vascular endothelial growth factor, leading to neoangiogenesis. Meanwhile, the transient microchannels in the skin created by MNs facilitate the transdermal delivery of CAP-generated nitric oxide (NO) to the sites of HF lesions, whereby the synergistic interaction between MXD and NO boosts perifollicular vasodilation. Consequently, the perifollicular microenvironment can be effectively reshaped to accelerate hair regeneration in AGA murine models. This multi-synergistic combination therapy strategy would hold great promise for effectively treating AGA and promoting hair regrowth.

Keyword :

androgenetic alopecia androgenetic alopecia cold atmospheric plasma cold atmospheric plasma drug delivery drug delivery microneedle microneedle nanomedicine nanomedicine

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GB/T 7714 Chen, Hao , Tang, Xianzhe , Huang, Yueye et al. Remodel the perifollicular microenvironment via Minoxidil-loaded microneedle patch and cold atmospheric plasma for treating androgenetic alopecia [J]. | NANO RESEARCH , 2024 , 17 (7) : 6411-6419 .
MLA Chen, Hao et al. "Remodel the perifollicular microenvironment via Minoxidil-loaded microneedle patch and cold atmospheric plasma for treating androgenetic alopecia" . | NANO RESEARCH 17 . 7 (2024) : 6411-6419 .
APA Chen, Hao , Tang, Xianzhe , Huang, Yueye , Chen, Chen , Yang, Yuheng , Hao, Chaojie et al. Remodel the perifollicular microenvironment via Minoxidil-loaded microneedle patch and cold atmospheric plasma for treating androgenetic alopecia . | NANO RESEARCH , 2024 , 17 (7) , 6411-6419 .
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Remodel the perifollicular microenvironment via Minoxidil-loaded microneedle patch and cold atmospheric plasma for treating androgenetic alopecia Scopus CSCD
期刊论文 | 2024 , 17 (7) , 6411-6419 | Nano Research
Remodel the perifollicular microenvironment via Minoxidil-loaded microneedle patch and cold atmospheric plasma for treating androgenetic alopecia EI CSCD
期刊论文 | 2024 , 17 (7) , 6411-6419 | Nano Research
Magneto-fluorescent nanobiosensor with tetrahedral framework nucleic acid-confined aptamer for trace adenosine triphosphate detection EI
期刊论文 | 2024 , 417 | Sensors and Actuators B: Chemical
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Abstract :

Accurate quantitation of trace-level ATP biomarkers often suffers from interference of sample matrix and remains a challenge. Herein, a novel magnetic biological nanosensor (MBNS) integrating tetrahedral framework nucleic acid (tFNA)-confined aptamers and ultrasensitive laser-induced fluorescence (LIF) was tailored and evaluated. The fluorescent aptamer nanoprobe hybridized with FAM-labelled cDNA was particularly incorporated into the inner cavity of tFNA, enabling a dual-mode mechanism that integrates molecular size selection and aptamer affinity recognition. By this strategy, the benefits of tFNA molecular sieve, the super sensitive properties of LIF, and the specific recognition of 'aptamer gene codes' were integrated, as triggered the superior response of ATP. The structures, properties and reaction mechanism of tFNA, as well as tFNA modified with aptamer probe at different sites, were characterized in detail. A high level of anti-interference was achieved, shielding against non-specific adsorption even in matrices with high protein and analogue content, 103∼105 times higher than ATP. The release of fluorescent beacon from aptamer probe was facilely driven by specific binding of ATP, and an ultra-sensitive detection of 75 pmol/L ATP was obtained without amplification. It was 2–3 orders of magnitude more sensitive than most fluorescent aptasensors. Applied to serum samples, the stability and reproducibility of the resultant aptasensor have been validated with the intra- and inter-assay RSD in 1.6–6.4 % and -1.5–8.4 %, respectively. Acceptable recoveries of 96.5–106.8 % were achieved, consistent with the LC-MS method. It was expected to open a simple and efficient protocol for highly specific and ultrasensitive ATP detection in clinical diagnostics. © 2024 Elsevier B.V.

Keyword :

Biomolecules Biomolecules Fluorescence Fluorescence Ion beams Ion beams Laser optics Laser optics Laser produced plasmas Laser produced plasmas Nucleic acids Nucleic acids Probes Probes

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GB/T 7714 Huang, Guobin , Xie, Qian , Chi, Jinxin et al. Magneto-fluorescent nanobiosensor with tetrahedral framework nucleic acid-confined aptamer for trace adenosine triphosphate detection [J]. | Sensors and Actuators B: Chemical , 2024 , 417 .
MLA Huang, Guobin et al. "Magneto-fluorescent nanobiosensor with tetrahedral framework nucleic acid-confined aptamer for trace adenosine triphosphate detection" . | Sensors and Actuators B: Chemical 417 (2024) .
APA Huang, Guobin , Xie, Qian , Chi, Jinxin , Lin, Chenchen , Lin, Xucong , Xie, Zenghong . Magneto-fluorescent nanobiosensor with tetrahedral framework nucleic acid-confined aptamer for trace adenosine triphosphate detection . | Sensors and Actuators B: Chemical , 2024 , 417 .
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Magneto-fluorescent nanobiosensor with tetrahedral framework nucleic acid-confined aptamer for trace adenosine triphosphate detection SCIE
期刊论文 | 2024 , 417 | SENSORS AND ACTUATORS B-CHEMICAL
Magneto-fluorescent nanobiosensor with tetrahedral framework nucleic acid-confined aptamer for trace adenosine triphosphate detection Scopus
期刊论文 | 2024 , 417 | Sensors and Actuators B: Chemical
Discrimination of 3-aminopyrrolidine derivatives with chiral and positional isomerism through mobility disparity based on non-covalent interactions SCIE
期刊论文 | 2024 , 197 | MICROCHEMICAL JOURNAL
WoS CC Cited Count: 1
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Abstract :

The differentiation of 3-AminoPyrrolidine (3AP) and its derivative isomers is significant due to their use as intermediates in drug synthesis. However, the separation of these isomers, which exhibit both chiral and positional isomerism, has consistently posed challenges. In this study, an efficient analytical method was developed to discrimination between the four isomers of R/S-I/N-Boc-3-AminoPyrrolidine (R/S-l/N-Boc-3AP) and four groups of derived chiral isomers, namely R/S-N-Methyl-3-AminoPyrrolidine (R/S-N-Me-3AP), R/S-N-Ethyl-3AminoPyrrolidine (R/S-N-Et-3AP), R/S-1-Bzl-3-AminoPyrrolidine (R/S-1-Bzl-3AP), and R/S-1-Cbz-3AminoPyrrolidine (R/S-1-Cbz-3AP). The discrimination was achieved by utilizing natamycin (Nat) as a differentiation agent and 2/3/4-aminobenzenesulphonic acid (2/3/4-ABSA) as ligand. The facile discrimination of the four positional isomers of R/S-1-Boc-3AP and R/S-N-Boc-3AP was achieved using ion mobility spectrometry (IMS) based on their formed diastereomeric complexes [Nat + (Boc-3AP)2 + (2-ABSA)2 + H]+. The isomers were also studied via tandem mass spectrometry (MS/MS) using the formed ternary complexes, different fragment ions were observed for l-Boc-3AP and N-Boc-3AP, but the R/S enantiomers cannot be discriminated either. In addition, the enantiomers R/S-l-Bzl-3AP and R/S-l-Cbz-3AP were differentiated based on mobility using [Nat + (R/Sl-Bzl-3AP) + (3-ABSA)2 + H]+ and [Nat + (R/S-l-Cbz-3AP) + 2-ABSA + H]+; however for the small enantiomeric molecules of R/S-N-Me-3AP and R/S-N-Et-3AP, chiral discrimination was not achieved via the ternary complexes of Nat + R/S-N-Me-3AP-ABSA and Nat + R/S-N-Et-3AP-ABSA. Importantly, the separation was greatly improved by the coordinated alkali metal ions, where the separation resolution (Rp-p) increased with the radius of the metal ions. Finally, quantitative analysis and method validation were carried out for the four Boc-3AP isomers using both MS/MS and IMS-MS. Overall, the proposed method opens possibilities for the rapid discrimination and quantification of isomers exhibiting both chiral and positional isomerism in MS/MS and IMS-MS analyses.

Keyword :

3-AminoPyrrolidine derivatives 3-AminoPyrrolidine derivatives Chiral and positional isomerism Chiral and positional isomerism Diastereomeric complexes Diastereomeric complexes Differentiation Differentiation Ion mobility spectrometry Ion mobility spectrometry

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GB/T 7714 He, Sisi , Liu, Yiyi , Chi, Chaoxian et al. Discrimination of 3-aminopyrrolidine derivatives with chiral and positional isomerism through mobility disparity based on non-covalent interactions [J]. | MICROCHEMICAL JOURNAL , 2024 , 197 .
MLA He, Sisi et al. "Discrimination of 3-aminopyrrolidine derivatives with chiral and positional isomerism through mobility disparity based on non-covalent interactions" . | MICROCHEMICAL JOURNAL 197 (2024) .
APA He, Sisi , Liu, Yiyi , Chi, Chaoxian , Zhou, Dongdong , Ding, Chuan-Fan , Lin, Xucong et al. Discrimination of 3-aminopyrrolidine derivatives with chiral and positional isomerism through mobility disparity based on non-covalent interactions . | MICROCHEMICAL JOURNAL , 2024 , 197 .
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Discrimination of 3-aminopyrrolidine derivatives with chiral and positional isomerism through mobility disparity based on non-covalent interactions Scopus
期刊论文 | 2024 , 197 | Microchemical Journal
Versatile, reusable and highly sensitive SERS-based point-of-care testing microplatform for reliable ATP detection Scopus
期刊论文 | 2024 , 265 | Biosensors and Bioelectronics
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Abstract :

The advancement in miniaturized Raman spectrometers, coupled with the single-molecule-level sensitivity and unique fingerprint identification capability of surface-enhanced Raman scattering (SERS), offers great potential for point-of-care testing (POCT). Despite this, accurately quantifying analyte molecules, particularly in complex samples with limited sample volumes, remains difficult. Herein, we present a versatile and reusable SERS microplatform for highly sensitive and reliable quantitative detection of adenosine triphosphate (ATP) in biological fluids. The platform utilizes gold-Prussian blue core-shell nanoparticles modified with polyethyleneimine (Au@PB@PEI NPs), embedded within gold nanoparticle-immobilized capillary-based silica monolithic materials. PB acts as an internal standard, while PEI enhances molecular capture. The periodic, bimodal porous structure of the silica monolithic materials provides uniform and abundant sites for nanoparticle attachment, facilitating rapid liquid permeation, intense SERS enhancement, and efficient enrichment. The platform regulates ATP capture and release through magnesium ions in the liquid phase, eliminating matrix interferences and enabling platform reuse. Integrating efficient molecular enrichment, separation, an interference-free internal standard, a liquid flow channel, and a detection chamber, our platform offers simplicity in operation, exceptional sensitivity and accuracy, and rapid analysis (∼10 min). Employing PB as an internal calibration standard, ratiometric Raman signals (I732/I2123) facilitate precise ATP quantification, achieving a remarkable limit of detection down to 0.62 pM. Furthermore, this platform has been proven to be highly reproducible and validated for ATP quantification in both mouse cerebrospinal fluid and human serum, underscoring its immense potential for POCT applications. © 2024

Keyword :

Adenosine triphosphate quantification Adenosine triphosphate quantification Multifunction integration Multifunction integration Point-of-care testing application Point-of-care testing application Reusability Reusability Surface-enhanced Raman scattering microplatform Surface-enhanced Raman scattering microplatform

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GB/T 7714 Chi, J. , Xie, Q. , Huang, G. et al. Versatile, reusable and highly sensitive SERS-based point-of-care testing microplatform for reliable ATP detection [J]. | Biosensors and Bioelectronics , 2024 , 265 .
MLA Chi, J. et al. "Versatile, reusable and highly sensitive SERS-based point-of-care testing microplatform for reliable ATP detection" . | Biosensors and Bioelectronics 265 (2024) .
APA Chi, J. , Xie, Q. , Huang, G. , Xie, S. , Lin, X. . Versatile, reusable and highly sensitive SERS-based point-of-care testing microplatform for reliable ATP detection . | Biosensors and Bioelectronics , 2024 , 265 .
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Versatile, reusable and highly sensitive SERS-based point-of-care testing microplatform for reliable ATP detection SCIE
期刊论文 | 2024 , 265 | BIOSENSORS & BIOELECTRONICS
Versatile, reusable and highly sensitive SERS-based point-of-care testing microplatform for reliable ATP detection EI
期刊论文 | 2024 , 265 | Biosensors and Bioelectronics
Covalent organic frameworks surface-anchored with silver nanoparticles for colorimetric detection of dopamine based on its oxidase-mimicking activity SCIE
期刊论文 | 2024 , 200 | MICROCHEMICAL JOURNAL
WoS CC Cited Count: 3
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Abstract :

Sensitive detection of dopamine (DA) is essential for the diagnosis of nervous system diseases. Herein, a nanozyme-based colorimetric platform for DA determination was proposed. Using an imine-type covalent organic framework (COF-TD) as a host matrix, a nanozyme (AgNPs@COF-TD) was fabricated by anchoring silver nanoparticles (AgNPs) on the surface of COF-TD via in situ reduction of silver ions. Various characterization results confirmed the successful synthesis of flower-like AgNPs@COF-TD with surface-anchored AgNPs, which could expose more active sites. The as-prepared AgNPs@COF-TD exhibited satisfactory oxidase-mimicking activity with a low Km, which could catalyze the oxidation of colorless 3,3 ',5,5 '-tetramethylbenzidine (TMB) to blue oxidized TMB (oxTMB) with significant absorbance at 657 nm. The introduction of DA not only reduced blue oxTMB to colorless TMB but also competed with TMB for the active sites of AgNPs@COF-TD, making a significant decrease in absorbance. Therefore, a label-free sensing strategy based on the oxidase-mimicking activity of AgNPs@COF-TD was successfully established for the colorimetric detection of DA, with a detection limit down to 0.2 mu M. The practical applicability of this assay was further validated by analyzing DA-spiked human urine samples. This work provided a facile approach to prepare COF-based nanozymes, and demonstrated their great potential in colorimetric detection and bioanalysis.

Keyword :

Colorimetric detection Colorimetric detection Covalent organic frameworks Covalent organic frameworks Dopamine Dopamine Oxidase-mimicking activity Oxidase-mimicking activity Silver nanoparticles Silver nanoparticles

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GB/T 7714 Jia, Zixiao , Shi, Dapeng , Wang, Jiabin et al. Covalent organic frameworks surface-anchored with silver nanoparticles for colorimetric detection of dopamine based on its oxidase-mimicking activity [J]. | MICROCHEMICAL JOURNAL , 2024 , 200 .
MLA Jia, Zixiao et al. "Covalent organic frameworks surface-anchored with silver nanoparticles for colorimetric detection of dopamine based on its oxidase-mimicking activity" . | MICROCHEMICAL JOURNAL 200 (2024) .
APA Jia, Zixiao , Shi, Dapeng , Wang, Jiabin , Lin, Xucong . Covalent organic frameworks surface-anchored with silver nanoparticles for colorimetric detection of dopamine based on its oxidase-mimicking activity . | MICROCHEMICAL JOURNAL , 2024 , 200 .
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Covalent organic frameworks surface-anchored with silver nanoparticles for colorimetric detection of dopamine based on its oxidase-mimicking activity Scopus
期刊论文 | 2024 , 200 | Microchemical Journal
凉粉草多糖水解单糖成分的高效液相色谱指纹图谱分析 CSCD PKU
期刊论文 | 2023 , 42 (04) , 501-506 | 分析试验室
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Abstract :

基于单糖与1-苯基-3-甲基-5-吡唑啉酮的柱前衍生,采用反相高效液相色谱(HPLC)梯度洗脱/紫外检测联用技术,建立了凉粉草多糖水解单糖的HPLC指纹图谱,用于凉粉草水提溶液中多糖水解单糖组分分析,鉴别测定了水解单糖组分中核糖、鼠李糖、葡萄糖醛酸、半乳糖醛酸、葡萄糖、半乳糖、木糖、阿拉伯糖等8种单糖含量,开展了不同地区的凉粉草多糖水解单糖的HPLC指纹图谱相似度分析、聚类分析和主成分分析。研究表明,不同地区凉粉草水解单糖组分中半乳糖、半乳糖醛酸和葡萄糖是样本聚类的重要变量,地区差异导致聚类分析差异,不同产地的凉粉草中多糖水解产生的单糖组分含量和分布具有一定的差异。方法可为凉粉草水提溶液中多糖水解单糖组分的评价提供一定的技术支持。

Keyword :

HPLC HPLC 凉粉草 凉粉草 单糖 单糖 多糖 多糖 指纹图谱 指纹图谱

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GB/T 7714 齐国敏 , 曹华斌 , 林旭聪 . 凉粉草多糖水解单糖成分的高效液相色谱指纹图谱分析 [J]. | 分析试验室 , 2023 , 42 (04) : 501-506 .
MLA 齐国敏 et al. "凉粉草多糖水解单糖成分的高效液相色谱指纹图谱分析" . | 分析试验室 42 . 04 (2023) : 501-506 .
APA 齐国敏 , 曹华斌 , 林旭聪 . 凉粉草多糖水解单糖成分的高效液相色谱指纹图谱分析 . | 分析试验室 , 2023 , 42 (04) , 501-506 .
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凉粉草多糖水解单糖成分的高效液相色谱指纹图谱分析 CSCD PKU
期刊论文 | 2023 , 42 (4) , 501-506 | 分析试验室
凉粉草多糖水解单糖成分的高效液相色谱指纹图谱分析 CSCD PKU
期刊论文 | 2023 , 42 (04) , 501-506 | 分析试验室
High performance liquid chromatography fingerprints of polysaccharide hy drolysate monosaccharides in Mesona chinensis Benth EI CSCD PKU
期刊论文 | 2023 , 42 (4) , 501-506 | Chinese Journal of Analysis Laboratory
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Abstract :

Based on the pre-column derivatization of monosaccharides with 1-phenyl-3-methyl-5-pyrazolonethe fingerprints of polysaccharide hydrolysate monosaccharides in the extract of Mesona chinensis Benth was established using reversed-phase high performance liquid chromatography HPLC gradient elution/UV detection technologywhich was used for the analysis of the components and content of polysaccharide hydrolyzed monosaccharides in the aqueous extract of Mesona chinensis Benthand eight monosaccharide components including riboserhamnoseglucuronic acidgalacturonic acidglucosegalactosexylose and arabinose were identified. Similarity analysiscluster analysisprincipal component analysis of the HPLC fingerprints of monosaccharide components were carried outand the changes in the contents of galactose galacturonic acid and glucose monosaccharide components in various samples were clarified. Regional differences lead to differences in cluster analysisand there are certain differences in the content and distribution of monosaccharide components produced by polysaccharide hydrolysis in Mesona chinensis Benth collected from different origins. The method can provide a potential technology for characterizing monosaccharide components of the polysaccharide in aqueous extract of Mesona chinensis Benth. © 2023, Youke Publishing Co.,Ltd. All rights reserved.

Keyword :

Cluster analysis Cluster analysis Column chromatography Column chromatography Extraction Extraction Glucose Glucose High performance liquid chromatography High performance liquid chromatography Hydrolysis Hydrolysis Palmprint recognition Palmprint recognition Principal component analysis Principal component analysis

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GB/T 7714 Qi, Guomin , Cao, Huabin , Lin, Xucong . High performance liquid chromatography fingerprints of polysaccharide hy drolysate monosaccharides in Mesona chinensis Benth [J]. | Chinese Journal of Analysis Laboratory , 2023 , 42 (4) : 501-506 .
MLA Qi, Guomin et al. "High performance liquid chromatography fingerprints of polysaccharide hy drolysate monosaccharides in Mesona chinensis Benth" . | Chinese Journal of Analysis Laboratory 42 . 4 (2023) : 501-506 .
APA Qi, Guomin , Cao, Huabin , Lin, Xucong . High performance liquid chromatography fingerprints of polysaccharide hy drolysate monosaccharides in Mesona chinensis Benth . | Chinese Journal of Analysis Laboratory , 2023 , 42 (4) , 501-506 .
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光纤耦合微通道反应系统原位监测海水氨氮和亚硝酸盐的研究 CSCD PKU
期刊论文 | 2023 , 45 (01) , 138-146 | 海洋学报
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Abstract :

原位监测海水中氨氮(NH_3-N)和亚硝酸盐(NO_2~-)对于水体富营养化评价十分重要。针对现有的氨氮、亚硝酸盐原位监测仪器难以在同一检测模块中分别实现荧光和分光光度分析,仪器高效集成及利用受到限制等问题,本文基于光纤耦合微通道反应系统,通过光波长切割、光纤波导和微通道反应Z型检测池等技术集成和条件优化,提出了在同一光纤偶联微反应系统中实现氨氮荧光分析和亚硝酸盐分光光度分析的原位测定技术。结果表明,该技术实现了荧光和可见光光度法的模式切换并可分别测定NH_3-N和定;不同的盐度对氨氮和亚硝酸盐测定影响较小;不同浊度下氨氮测定误差为-6.6%~2.5%,浊度补偿校正后NO_2~-测定误差小于0.1%。将该仪器应用于养殖海水中开展氨氮和亚硝酸盐的原位分析,仪器原位监测值与实验室方法测定值相符合。本文所提出的技术在同一模块中分别实现了氨氮和亚硝酸盐的荧光和分光光度两种模式的原位监测,为海水营养盐原位监测仪器的集成化设计提供了新的思路。

Keyword :

亚硝酸盐 亚硝酸盐 光纤耦合 光纤耦合 原位监测 原位监测 微通道反应系统 微通道反应系统 氨氮 氨氮

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GB/T 7714 姜双城 , 杜虹 , 郑惠东 et al. 光纤耦合微通道反应系统原位监测海水氨氮和亚硝酸盐的研究 [J]. | 海洋学报 , 2023 , 45 (01) : 138-146 .
MLA 姜双城 et al. "光纤耦合微通道反应系统原位监测海水氨氮和亚硝酸盐的研究" . | 海洋学报 45 . 01 (2023) : 138-146 .
APA 姜双城 , 杜虹 , 郑惠东 , 汤新华 , 潘文涛 , 高俊 et al. 光纤耦合微通道反应系统原位监测海水氨氮和亚硝酸盐的研究 . | 海洋学报 , 2023 , 45 (01) , 138-146 .
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光纤耦合微通道反应系统原位监测海水氨氮和亚硝酸盐的研究 CSCD PKU
期刊论文 | 2023 , 45 (01) , 138-146 | 海洋学报
Monolithic column with multiple COF surface layers via an in-situ surface self-assembly strategy for efficient in-tube solid-phase microextraction of benzodiazepines SCIE
期刊论文 | 2023 , 194 | MICROCHEMICAL JOURNAL
WoS CC Cited Count: 6
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Abstract :

Covalent organic framework (COF)-based monolithic columns have been extensively used for sample preparation. In order to maximize the COF extraction properties, it is attractive to increase the COF surface coverage of the COF-based monolithic column. Herein, a novel monolithic column with multiple COF surface layers was prepared via an in-situ surface self-assembly strategy to increase the COF surface coverage. For this preparation, the poly (p-phenylenediamine) (PPDA) fibers were first grafted onto the parent monolith. Then, due to the abundant NH2-anchor sites of the PPDA fiber, a large number of COF microspheres were self-assembled on PPDA fibers, and further interlinked with each other to form multiple COF surface layers on the monolith, which further improve the COF surface coverage. Various characterization techniques were employed to confirm this successful preparation. Benefiting from the enhanced COF surface coverage, the developed monolith exhibited superior extraction ability towards benzodiazepines (BZDs), which are central nervous system depressants that are tightly controlled by governments. The hydrophobic and pi-pi stacking interactions should be the main adsorption mechanism for in-tube SPME of BZDs. Under the optimal SPME conditions, a simple in-tube SPMEHPLC-DAD method was established for the detection of trace BZDs in saliva, with a wide linear range (5 - 300 ng/mL), excellent sensitivity (LODs <= 2 ng/mL) and satisfactory recoveries (81.4% - 98.0%). This research provided a versatile route to fabricate the COF-based monolith with high surface coverage, demonstrating its great potential in efficient sample preparation.

Keyword :

Benzodiazepines Benzodiazepines Covalent organic framework Covalent organic framework In -situ surface self-assembly strategy In -situ surface self-assembly strategy In -tube solid -phase microextraction In -tube solid -phase microextraction Monolithic column Monolithic column Multiple COF surface layers Multiple COF surface layers

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GB/T 7714 Wang, Jiabin , Sun, Jian , Zhao, Yanfei et al. Monolithic column with multiple COF surface layers via an in-situ surface self-assembly strategy for efficient in-tube solid-phase microextraction of benzodiazepines [J]. | MICROCHEMICAL JOURNAL , 2023 , 194 .
MLA Wang, Jiabin et al. "Monolithic column with multiple COF surface layers via an in-situ surface self-assembly strategy for efficient in-tube solid-phase microextraction of benzodiazepines" . | MICROCHEMICAL JOURNAL 194 (2023) .
APA Wang, Jiabin , Sun, Jian , Zhao, Yanfei , Jia, Zixiao , Zheng, Zheheng , Lin, Xucong . Monolithic column with multiple COF surface layers via an in-situ surface self-assembly strategy for efficient in-tube solid-phase microextraction of benzodiazepines . | MICROCHEMICAL JOURNAL , 2023 , 194 .
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Monolithic column with multiple COF surface layers via an in-situ surface self-assembly strategy for efficient in-tube solid-phase microextraction of benzodiazepines Scopus
期刊论文 | 2023 , 194 | Microchemical Journal
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