Electroanalysis最新文献

Cover Picture:(Electroanalysis 10/2023) 封面图片：（Electroanalysis 10/2023）

IF 3 3区化学

Electroanalysis Pub Date : 2023-10-13 DOI: 10.1002/elan.202381001

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Cover Picture: (Electroanalysis 9/2023) 封面图片:(Electroanalysis 9/2023)

IF 3 3区化学

Electroanalysis Pub Date : 2023-09-13 DOI: 10.1002/elan.202380901

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3D-printed amperometric sensor for the detection of ethanol in saliva 用于检测唾液中乙醇的3D打印电流传感器

IF 3 3区化学

Electroanalysis Pub Date : 2023-09-07 DOI: 10.1002/elan.202300044

Theodora Wrobel von Zuben, Cristiane Kalinke, Bruno Campos Janegitz, Airton Gonçalves Salles Jr., Juliano Alves Bonacin

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Electrochemical pH sensing characteristics of nitrogen-doped zinc oxide nanostructures using a screen-printed platform** 使用丝网印刷平台的氮掺杂氧化锌纳米结构的电化学pH传感特性

IF 3 3区化学

Electroanalysis Pub Date : 2023-08-27 DOI: 10.1002/elan.202300156

Alisha Mary Manoj, Leema Rose Viannie

{"title":"Electrochemical pH sensing characteristics of nitrogen-doped zinc oxide nanostructures using a screen-printed platform**","authors":"Alisha Mary Manoj, Leema Rose Viannie","doi":"10.1002/elan.202300156","DOIUrl":"10.1002/elan.202300156","url":null,"abstract":"Monitoring pH variations is of vital importance in the field of medical diagnostics and healthcare devices. Employing zinc oxide (ZnO) nanomaterials as active sensing elements allows sensitivity enhancement by increasing the surface area of the nanomaterials used and improving the charge transfer mechanism in the sensor. In this study, an electrochemical pH sensor based on nitrogen-doped zinc oxide nanosheets was developed using a single step hydrothermal technique. The results obtained show the successful incorporation of nitrogen into the crystal structure of ZnO nanosheets. The sensing platform was fabricated using a simple mask-printing technique using carbon electrodes on a polyimide substrate. The sensing characteristics of nitrogen-doped ZnO (N−ZnO) nanosheets as pH sensors are evaluated for the first time. The results show that the response time and performance improved with nitrogen doping, for a lower analyte volume of just 5 mL. Furthermore, the detailed mechanism of pH sensing was formulated using electrochemical impedance spectroscopy (EIS). The resistance obtained was directly proportional to the charge-transfer resistance at the electrode-electrolyte interface for N−ZnO. The sensitivity as determined by charge-transfer resistance is 0.512 MΩ/pH. Further, the chronoamperometric studies show a sensitivity of 0.156 μA/pH. The response characteristics also reveal a linearity of 0.965 over a pH range of 3 to 9. Hence, the study shows the exceptional response of N−ZnO nanostructures in pH sensing applications. The advantages of the N−ZnO nanosheets include higher sensitivity, flexibility, and a smaller volume of testing fluid that promotes their easy integration into various analytical applications.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"35 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46114498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Design of a portable sweat glucose testing system 便携式汗液葡萄糖检测系统的设计

IF 3 3区化学

Electroanalysis Pub Date : 2023-08-20 DOI: 10.1002/elan.202300180

Yan Zhang Chen, Chuanjin Xu, Wen Han Li, Xi Jun Huang, He Yue Huang, Hong Yang

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A tandem of GC-MS and electroanalysis for a rapid chemical profiling of bacterial extracellular matrix GC‐MS和电分析串联用于细菌细胞外基质的快速化学分析

IF 3 3区化学

Electroanalysis Pub Date : 2023-08-15 DOI: 10.1002/elan.202300178

Y. E. Silina, E. V. Zolotukhina, M. Koch, C. Fink-Straube

引用次数: 0

Solvent effects on the graphite surface targeting the construction of voltammetric sensors with potential applications in pharmaceutical area 溶剂对石墨表面的影响在制药领域具有潜在的应用前景

IF 3 3区化学

Electroanalysis Pub Date : 2023-08-11 DOI: 10.1002/elan.202300075

Thainá M. Vilela, Mateus A. Gonçalves, Roberta C. Martins, Matheus J. F. Bazzana, Adelir A. Saczk, Teodorico C. Ramalho, Fabiana S. Felix

{"title":"Solvent effects on the graphite surface targeting the construction of voltammetric sensors with potential applications in pharmaceutical area","authors":"Thainá M. Vilela, Mateus A. Gonçalves, Roberta C. Martins, Matheus J. F. Bazzana, Adelir A. Saczk, Teodorico C. Ramalho, Fabiana S. Felix","doi":"10.1002/elan.202300075","DOIUrl":"10.1002/elan.202300075","url":null,"abstract":"In this paper the effect of different solvents (ethanol, acetone, dichloromethane and hexane) in the surface treatment of graphite for the construction of voltammetric sensors was evaluated. During voltammetric experiments of the graphite powder-based sensor treated with ethanol, it was possible to observe a significant increase in current signals for the redox process of the model analyte (acetaminophen), as well as an increase in the area density of this sensor compared to its unmodified electrode. Theoretical studies involving Density Functional Theory (DFT) and Quantum Theory of Atoms in Molecules (QTAIM) showed greater interaction and stability when graphite was treated with ethanol solvent. Moreover, the theoretical calculations indicated that treating the voltammetric sensor with ethanol offers improvements in the electrochemical response of the model analyte mainly due to a higher spin density, and a partially covalent interaction between solvent and graphite surface. Therefore, graphite powder-based sensors treated with ethanol were used for determination of acetaminophen in pharmaceutical samples and their results were in good agreement with those obtained by using spectrophotometric method recommended by Pharmacopoeia.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"35 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48431675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Cover Picture: (Electroanalysis 8/2023) 封面图片:(Electroanalysis 8/2023)

IF 3 3区化学

Electroanalysis Pub Date : 2023-08-11 DOI: 10.1002/elan.202380801

引用次数: 0

An electrochemical biosensor for the determination of hormone Human Chorionic Gonadotropin (hCG) in human serum 电化学生物传感器测定人血清中人绒毛膜促性腺激素（hCG）

IF 3 3区化学

Electroanalysis Pub Date : 2023-07-23 DOI: 10.1002/elan.202300095

Adrian Koterwa, Magdalena Bojko, Jacek Ryl, Krzysztof Łukaszuk, Kornelia Kozłowska, Wiktor Sieklicki, Sylwia Rodziewicz-Motowidło, Paweł Niedziałkowski

{"title":"An electrochemical biosensor for the determination of hormone Human Chorionic Gonadotropin (hCG) in human serum","authors":"Adrian Koterwa, Magdalena Bojko, Jacek Ryl, Krzysztof Łukaszuk, Kornelia Kozłowska, Wiktor Sieklicki, Sylwia Rodziewicz-Motowidło, Paweł Niedziałkowski","doi":"10.1002/elan.202300095","DOIUrl":"10.1002/elan.202300095","url":null,"abstract":"This work describes the modification of a gold electrode to create an electrochemical biosensor capable of detecting human chorionic gonadotropin (hCG). The biosensor was obtained by modifying the gold electrode with cysteamine and oligopeptide (PPLRINRHILTR). The modification steps of the gold electrode were confirmed by cyclic voltammetry (CV) and impedance electrochemical spectroscopy (EIS) measurements. The conducted EIS experiments in 0.01 M PBS, pH 7.4 confirm that the biosensor exhibits sensitivity towards hCG in a range of concentrations from 1×10−12 to 1×10−7 M (0.5 mIU/mL – 50 000 mIU/mL) to solutions with a detection limit of 1. 91×10−14 M (0.0095 mIU/mL). The effectiveness of the investigated biosensor was also investigated in human serum. The EIS comparative investigations were performed in human serum containing a concentration of 1×10−12 M (0.5 mIU/mL) hCG and in human serum where the hCG was added. The obtained results indicate that the investigated biosensor is selective for the presence of hCG hormone in the human serum.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"35 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47591311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Vancomycin sensing using a phenylboronic acid-modified nanopore pipette 使用苯基硼酸修饰的纳米孔移液管检测万古霉素

IF 3 3区化学

Electroanalysis Pub Date : 2023-07-23 DOI: 10.1002/elan.202300173

Fumiya Sato, Haruka Nakano, Toshio Kamijo, Kazuhiro Watanabe, Tsutomu Fujimura, Yasufumi Takahashi, Katsuhiko Sato

引用次数: 0