Microchimica Acta最新文献_第4页

Dendritic mesoporous silica loaded with gold nanoclusters and their application in immunochromatographic assay 负载金纳米团簇的树枝状介孔二氧化硅及其在免疫层析检测中的应用。

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-11-05 DOI: 10.1007/s00604-024-06808-0

Tao Peng, Zhanwei Liang, Jihao Si, Lu Huang, Hua Ye, Xiaoqing Li, Miao Sun, Jie Xie, Xinhua Dai

{"title":"Dendritic mesoporous silica loaded with gold nanoclusters and their application in immunochromatographic assay","authors":"Tao Peng, Zhanwei Liang, Jihao Si, Lu Huang, Hua Ye, Xiaoqing Li, Miao Sun, Jie Xie, Xinhua Dai","doi":"10.1007/s00604-024-06808-0","DOIUrl":"10.1007/s00604-024-06808-0","url":null,"abstract":"<div><p>Novel green-emitting fluorescent microspheres (GreFMPs) were assembled by loading highly luminescent gold nanoclusters (Arg/ATT/AuNCs) on dendritic mesoporous silica nanoparticles (DMSNs) via PEI-mediated electrostatic adsorption. The fluorescence microspheres exhibit excellent monodispersion with average diameters about (254.5 ± 34.6 nm). Compared with free Arg/ATT/AuNCs, the GreFMPs have similar fluorescent properties and biocompatibility but superior environmental tolerance. Subsequently, an immunochromatographic assay based on GreFMPs (GreFMP-ICA) has been successfully developed, which is highly selective toward alpha fetoprotein (AFP) in human serum. Under the optimal parameters, there is a good linear range between 0.5 and 160.0 ng/mL, the limit of detection was found to be about 0.5 ng/mL, and the recovery and relative standard deviation are 81.0 ~ 100.6% and 3.5 ~ 16.6%, respectively. These results manifested that the GreFMPs are beneficial for the rational design of the ICA platform, and the proposed GreFMP-ICA has the potential to screen AFP in clinical applications.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 12","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visual aptasensor based on PtNPs/g-C3N4 and DNase I for the field detection of acetamiprid 基于 PtNPs/g-C3N4 和 DNase I 的视觉感应器，用于现场检测啶虫脒。

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-11-05 DOI: 10.1007/s00604-024-06801-7

Linhai Wang, Xiao Hu, Guoqing Yao, Qinhua Chen, Sicen Wang

{"title":"Visual aptasensor based on PtNPs/g-C3N4 and DNase I for the field detection of acetamiprid","authors":"Linhai Wang, Xiao Hu, Guoqing Yao, Qinhua Chen, Sicen Wang","doi":"10.1007/s00604-024-06801-7","DOIUrl":"10.1007/s00604-024-06801-7","url":null,"abstract":"<div><p> A visual aptasensor based on the combination of graphitic carbon nitride loaded with platinum nanoparticles (PtNPs/g-C<sub>3</sub>N<sub>4</sub>) and deoxyribonuclease I (DNase I) was developed for detecting acetamiprid. The prepared PtNPs/g-C<sub>3</sub>N<sub>4</sub> exhibited excellent peroxidase (POD)-like activity, demonstrating the capacity to oxidize the colourless o-phenylenediamine (OPD) to produce the coloured product diaminophenazine (DAP) in the presence of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>). The DNA aptamer of acetamiprid can adsorb onto the surface of PtNPs/g-C<sub>3</sub>N<sub>4</sub>, thereby inhibiting its POD activity. The binding of acetamiprid to its aptamer results in the aptamer desorbing from the surface of PtNPs/g-C<sub>3</sub>N<sub>4</sub> and subsequent digestion by DNase I. Ascribed to the synergistic effect of these factors, the aptasensor can achieve the rapid on-site detection of acetamiprid based on the acetamiprid-induced the colour change of the solution just with the smartphone. Furthermore, due to the remarkable fluorescence signal of DAP at 570 nm, the aptasensor under fluorescence mode enables highly sensitive and quantitative detection of acetamiprid with a linear range of 1 ng/mL to 4 µg/mL and a detection limit as low as 0.31 ng/mL. The aptasensor has successfully realized the detection of acetamiprid in river water and cucumber samples, offering a novel perspective for the rapid assessment of environmental pollution and food safety risks associated with acetamiprid residues.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 12","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoelectrochemical detection of Cu2+ based on ZnIn2S4/WO3 Z-scheme heterojunction 基于 ZnIn2S4/WO3 Z 型异质结的 Cu2+ 光电化学检测。

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-11-05 DOI: 10.1007/s00604-024-06785-4

Yuru Shen, Xingyu Zeng, Mingjian Chen, Yun Du, Yinyu Li, Yange Peng, Fang He, Sizhan Wu, Hangdao Qin

{"title":"Photoelectrochemical detection of Cu2+ based on ZnIn2S4/WO3 Z-scheme heterojunction","authors":"Yuru Shen, Xingyu Zeng, Mingjian Chen, Yun Du, Yinyu Li, Yange Peng, Fang He, Sizhan Wu, Hangdao Qin","doi":"10.1007/s00604-024-06785-4","DOIUrl":"10.1007/s00604-024-06785-4","url":null,"abstract":"<div><p>A one-step hydrothermal technique was utilized to generate WO<sub>3</sub> nanosheets on fluorine-doped tin oxide (FTO) (WO<sub>3</sub>/FTO), which were subsequently modified with ZnIn<sub>2</sub>S<sub>4</sub> microspheres to create a Z-scheme heterojunction ZnIn<sub>2</sub>S<sub>4</sub>/WO<sub>3</sub>/FTO electrode for Cu<sup>2+</sup> detection. The heterojunction exhibited excellent photoelectric conversion efficiency, which was nearly 2.5-fold and 5.1-fold greater than that of WO<sub>3</sub> and ZnIn<sub>2</sub>S<sub>4</sub>. The reduced photoelectrochemical response signal was caused by the formation of Cu<sub>x</sub>S and enabled Cu<sup>2+</sup> assessment in water samples. After optimizing the experimental conditions, the anodic photocurrent at 0 V vs SCE in 0.100 M phosphate buffer (pH 7.0) containing 0.100 M <i>L</i>-ascorbic acid was linear with the common logarithm of Cu<sup>2+</sup> concentration from 5.00 nM to 100 μM, with a limit of detection of 1.2 nM (<i>S</i>/<i>N</i> = 3). Satisfactory recovery results were obtained in the analyses of Xiangjiang River water samples.</p></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 12","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chiral nanoenzymes: synthesis and applications 手性纳米酶：合成与应用。

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-11-04 DOI: 10.1007/s00604-024-06803-5

Xiaohui Niu, Jianying Zhang, Mei Yuan, Yongqi Liu, Yuewei Wang, Hongxia Li, Kunjie Wang

{"title":"Chiral nanoenzymes: synthesis and applications","authors":"Xiaohui Niu, Jianying Zhang, Mei Yuan, Yongqi Liu, Yuewei Wang, Hongxia Li, Kunjie Wang","doi":"10.1007/s00604-024-06803-5","DOIUrl":"10.1007/s00604-024-06803-5","url":null,"abstract":"<div><p>Chiral nanoenzymes are a new type of material that possesses both chiral nanostructures and enzymatic catalytic activity. These materials exhibit selectivity in their catalytic activity towards organisms due to the introduction of chiral features in nanomaterials and have inherent chiral discrimination in organisms. As synthetic enzymes, chiral nanoenzymes offer significant advantages over natural enzymes. Due to their unique chiral structure and distinctive physicochemical properties, chiral nanoenzymes play an important role in various fields, including biology, medicine, and environmental protection. Their strong stereospecificity and biocompatibility make them useful in disease therapy, biosensing, and chiral catalysis, setting them apart from conventional and natural enzymes. In recent years, the design of synthetic methods and biological applications of chiral nanoenzymes has received significant attention and extensive research among scientists. This paper provides a systematic review of the research progress in the discovery, development, and application of chiral nanoenzymes in the last decade. Additionally, it presents various applications of chiral nanoenzymes, such as disease therapy, biosensing, and chiral catalysis. Finally, the challenges and future prospects of chiral nanoenzymes are discussed.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 12","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142567166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbon dot-based nanomaterials with enzyme-like activity for fluorescence imaging and potential combination with therapy of cancer 具有类似酶活性的碳点纳米材料，可用于荧光成像和潜在的癌症联合治疗。

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-11-04 DOI: 10.1007/s00604-024-06813-3

Juan Ning, Guojie Li, Yijun Zhao, Jiahui Shi, Yamin Nie, Yonghong Li, Yanmei Zhou

{"title":"Carbon dot-based nanomaterials with enzyme-like activity for fluorescence imaging and potential combination with therapy of cancer","authors":"Juan Ning, Guojie Li, Yijun Zhao, Jiahui Shi, Yamin Nie, Yonghong Li, Yanmei Zhou","doi":"10.1007/s00604-024-06813-3","DOIUrl":"10.1007/s00604-024-06813-3","url":null,"abstract":"<div><p>Carbon dot-based nanomaterials (o-CDs@Mn) were fabricated by assembling fluorescent o-CDs with enzyme-like activity and Mn nanoparticles with photothermal properties for realizing fluorescence imaging and combined therapy of cancer. Due to the inherent optical properties of o-CDs, o-CDs@Mn can be effectively used for bioimaging. In addition, o-CDs@Mn possess peroxidase-like (POD-like) and glutathione (GSH) degradation capabilities, which can effectively deplete excessive H<sub>2</sub>O<sub>2</sub> and GSH in the tumor microenvironment (TME), generating ·OH and reduced GSSH for regulating the TME and triggering ROS-mediated apoptosis in cancer cells. More importantly, it is synergistically supplemented with fluorescence imaging and photothermal therapy (PTT), which realizes the integration of monitoring and combined treatment, providing a promising potential pathway for accurate and efficient cancer treatment.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 12","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphene quantum dots modified electrodes as electrochemical sensing tool towards the detection of codeine in biological fluids and soft drinks 石墨烯量子点修饰电极作为电化学传感工具，用于检测生物液体和软饮料中的可待因。

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-11-04 DOI: 10.1007/s00604-024-06787-2

Lucía Ferrer-Biechy, M. Laura Soriano, Rafael Lucena, Soledad Cárdenas

{"title":"Graphene quantum dots modified electrodes as electrochemical sensing tool towards the detection of codeine in biological fluids and soft drinks","authors":"Lucía Ferrer-Biechy, M. Laura Soriano, Rafael Lucena, Soledad Cárdenas","doi":"10.1007/s00604-024-06787-2","DOIUrl":"10.1007/s00604-024-06787-2","url":null,"abstract":"<div><p>An electroanalytical method based on disposable screen-printed carbon electrodes modified with non-toxic carbonaceous nanodots is proposed as a reliable and effective device for codeine determination in biological fluids and soft drinks. Graphene quantum dots (GQDs), carbon quantum dots (CQDs) and carbon nanodots (CNDs) were evaluated as electrode modifiers for the determination of the drug. The electroactive areas of the modified electrodes were assessed by cyclic voltammetry using potassium ferricyanide. Results demonstrated that GQDs provided the best analytical response for codeine, displaying an intense and well-defined anodic wave approximately 0.9 V vs reference electrode. The method exhibits an acceptable linear dynamic range, low limits of detection and quantification (0.21 and 0.73 µM, respectively), and satisfactory precision (below 3.9% expressed as relative standard deviation (RSD)) in saliva. Only the analysis of biofluids requires a simple extraction protocol. The feasibility and applicability of this novel approach were assessed by determining codeine in different matrices, with recoveries ranging from 69 to 112%. This cost-effective, simple, easily miniaturised and portable method was applied not only to biofluids but also for the direct detection of codeine in soft drinks combined with a codeine-enriched syrup, a medication that is being used to adulterate beverages, particularly at specific events (drinking and nightclub parties). There is no need for any sample treatment, demonstrating its versatility in analysing beverages for potential adulteration as well.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 12","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142567167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An inverted tetrahedron-mediated DNA walker for sulfadimethoxine detection 用于磺胺二甲氧嗪检测的倒四面体介导 DNA 步行器。

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-11-04 DOI: 10.1007/s00604-024-06810-6

Tai Ye, Zheng Luo, Yueyue Che, Min Yuan, Hui Cao, Liling Hao, Qian Zhang, Yongxin Xie, Kaisen Zhang, Fei Xu

{"title":"An inverted tetrahedron-mediated DNA walker for sulfadimethoxine detection","authors":"Tai Ye, Zheng Luo, Yueyue Che, Min Yuan, Hui Cao, Liling Hao, Qian Zhang, Yongxin Xie, Kaisen Zhang, Fei Xu","doi":"10.1007/s00604-024-06810-6","DOIUrl":"10.1007/s00604-024-06810-6","url":null,"abstract":"<div><p> An inverted DNA tetrahedron–mediated modular DNA walker was developed for the determination of sulfadimethoxine. The inverted DNA tetrahedron scaffold raises several advantages of recognition module including appropriate lateral space, multiple recognition domains, and cost-effectiveness. The proposed inverted DNA tetrahedron-based recognition module exhibited better binding affinity and kinetics toward target antibiotic than that of other DNA tetrahedron counterparts. Upon specific binding with target, the released bipedal DNA walking strand hops to the signal amplification module and moves stochastically with assistant of nicking enzyme. By coupling these two modules, a good linear relationship between the fluorescence intensity of supernatant and the concentration of sulfadimethoxine was achieved in the range 0.1–100 nM, and the limit of detection was 64.7 pM. Furthermore, this modular DNA walker had also successfully applied to spiked honey and milk samples with satisfactory recoveries from 91.5 to 108.8%, demonstrating its practical sensing capability.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 12","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-mode electrochemical and electrochemiluminescence detection of dopamine based on perylene diimide self-assembly material 基于过二亚胺自组装材料的多巴胺双模电化学和电化学发光检测技术

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-10-31 DOI: 10.1007/s00604-024-06768-5

Wei Zhang, Hong Zhang, Chuan Li, Lei Shang, Rongna Ma, Liping Jia, Xiaojian Li, Bo Li, Huaisheng Wang

{"title":"Dual-mode electrochemical and electrochemiluminescence detection of dopamine based on perylene diimide self-assembly material","authors":"Wei Zhang, Hong Zhang, Chuan Li, Lei Shang, Rongna Ma, Liping Jia, Xiaojian Li, Bo Li, Huaisheng Wang","doi":"10.1007/s00604-024-06768-5","DOIUrl":"10.1007/s00604-024-06768-5","url":null,"abstract":"<div><p>The self-assembly material N,N-bis-(3-dimethyl aminopropyl)-3,4,9,10-perylene tetracarboxylic acid diimide (PDI) is reported to show electrochemical (EC)/electrochemiluminescence (ECL) property for designing new dual-mode dopamine (DA) sensors. K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> significantly improved the EC reduction current at -0.346 V and ECL intensity at -0.25 V of the PDI self-assembly material. DA largely decreased the EC reduction current and ECL intensity of this homogeneous EC/ECL material due to the competitive consumption of K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> in the oxidization process of DA and the low electron conductivity of polyDA formed through the oxidization of DA by K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>. In addition, the ECL quenching mechanism involved an energy-transfer process resulting from the collision between the produced o-benzoquinone species (oxidization of DA) and the excited state of PDI, which decreased the ECL intensity. This homogeneous EC/ECL material showed linear EC current response for DA from 5.0 nM to 50.0 µM with a detection of limit of 2.7 nM and linear ECL response for DA from 1.0 nM to 100.0 µM with a detection of limit of 0.41 nM. The proposed dual-mode EC/ECL sensors also showed good feasibility in urine sample analysis.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 11","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel molecularly imprinted electrochemical sensor based on quasi-three-dimensional nanomaterials Nb2CTx/AgNWs for specific detection of sulfadiazine 基于准三维纳米材料 Nb2CTx/AgNWs 的新型分子印迹电化学传感器用于磺胺嘧啶的特异性检测

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-10-31 DOI: 10.1007/s00604-024-06805-3

Yifei Wang, Jingwen He, Jie Wu, Wen Hao, Lin Cai, Haiyang Wang, Guozhen Fang, Shuo Wang

{"title":"A novel molecularly imprinted electrochemical sensor based on quasi-three-dimensional nanomaterials Nb2CTx/AgNWs for specific detection of sulfadiazine","authors":"Yifei Wang, Jingwen He, Jie Wu, Wen Hao, Lin Cai, Haiyang Wang, Guozhen Fang, Shuo Wang","doi":"10.1007/s00604-024-06805-3","DOIUrl":"10.1007/s00604-024-06805-3","url":null,"abstract":"<div><p>A novel molecularly imprinted electrochemical sensor (MIECS) was constructed for the specific detection of sulfadiazine (SDZ) in food. Niobium carbide (Nb<sub>2</sub>CTx) as a typical two-dimensional lamellar nanomaterial has good electrical conductivity and unique structure, which was assembled with one-dimensional silver nanowires (AgNWs) to form quasi-three-dimensional composite nanomaterials (Nb<sub>2</sub>CTx/AgNWs). As spacer material, AgNWs prevented the aggregation of Nb<sub>2</sub>CTx and the collapse of Nb<sub>2</sub>CTx layers. At the same time, a fast electron transport channel was constructed through the synergistic effect between nanomaterials the two. The Nb<sub>2</sub>CTx/AgNWs realized the enhancement of electrical signals. Molecularly imprinted polymers (MIPs) endowed the sensor with selectivity, achieving the specific detection of sulfadiazine. Under the optimal experimental conditions, the method has a wide linear range (1 × 10<sup>−8</sup>–1 × 10<sup>−4</sup> mol L<sup>−1</sup>) and a low limit of detection (1.30 × 10<sup>−9</sup> mol L<sup>−1</sup>). The sensor was used to detect sulfadiazine in pork, chicken, and feed samples, and the recovery was 82.61–94.87%. The results were in good agreement with the HPLC results, which proved the accuracy and practicability of the method.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 11","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A cotton swab platform for fluorescent detection of aluminum ion in food samples based on aggregation-induced emission of carbon dots 基于碳点聚集诱导发射的食品样品铝离子荧光检测棉签平台

IF 5.3 2区化学

Microchimica Acta Pub Date : 2024-10-30 DOI: 10.1007/s00604-024-06799-y

Tong Shao, Dou Yang, Xiaoshuang Wang, Ruirui Wang, Qiaoli Yue

{"title":"A cotton swab platform for fluorescent detection of aluminum ion in food samples based on aggregation-induced emission of carbon dots","authors":"Tong Shao, Dou Yang, Xiaoshuang Wang, Ruirui Wang, Qiaoli Yue","doi":"10.1007/s00604-024-06799-y","DOIUrl":"10.1007/s00604-024-06799-y","url":null,"abstract":"<div><p>A novel portable cotton swab based on nitrogen-doped carbon dots (NCDs) for Al<sup>3+</sup> detection was constructed for the first time. NCDs with bright green fluorescence were prepared by hydrothermal method with phenylhydrazine hydrochloride and 3-hydroxy-2-naphthoic acid hydrazide as precursors. The surface of NCDs was exposed to abundant functional groups (such as amino, carboxyl, hydroxyl, etc.), which was helpful for the formation of complexes between NCDs and Al<sup>3+</sup>. In the presence of Al<sup>3+</sup>, the aggregation of NCDs obviously induced their fluorescence enhancement due to the aggregation-induced emission (AIE) of NCDs. Furthermore, the quantum yield (QY) of NCDs was enhanced by 12 times with Al<sup>3+</sup>, and the fluorescence lifetime was increased by 7.54 ns. The fluorescence intensity was linearly correlated with the concentration of Al<sup>3+</sup> (2.5–300 μM), and the limit of detection was 0.76 μM. Moreover, for the portable way, cotton swabs were successfully employed to construct the sensors for the detection of Al<sup>3+</sup> in food samples. This proposal has potential for the application in food analysis.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"191 11","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0