Electroanalysis最新文献

{"title":"Nb2O5 Nanosheets Produced via Planar-Confined Growth on GO as a Platform for Electrochemical Sensor for Ibuprofen Detection in Surface Water","authors":"Kelly Leite dos Santos Castro Assis,&nbsp;Nadia Cristina da Silva Iack,&nbsp;Warley Cirqueira Machado,&nbsp;Renato Teixeira de Freitas,&nbsp;Carolina Carvalho de Mello,&nbsp;Victor Magno Paiva,&nbsp;Eliane D. Elia,&nbsp;Braulio Soares Archanjo,&nbsp;Carlos Alberto Achete","doi":"10.1002/elan.70034","DOIUrl":"10.1002/elan.70034","url":null,"abstract":"<p>This work presents the development of an electrochemical sensor based on a glassy carbon modified with niobium pentoxide (GCE-Nb₂O₅) nanosheets to detect low concentrations of ibuprofen (IBP) in aqueous matrices. IBP is considered an emerging pollutant due to its high consumption and potential to enter water bodies through improper disposal of untreated sewage, posing a risk to marine organisms and human health. Therefore, studying techniques for detecting and removing this contaminant is crucial. The electrode was modified by depositing 10 µL of a 0.2 mg mL⁻¹ ethanol dispersion of Nb₂O₅ nanoparticles and then drying in an oven. Nb₂O₅, as the modifying agent, presented excellent chemical stability, electrical conductivity, durability, and resistance. Differential pulse voltammetry, as carried out, used an amplitude of 0.05 V and a scan rate of 0.020 V s⁻¹, yielding the best results. The supporting electrolyte was evaluated, and the acetate buffer solution 0.2 M with a pH of 4.5 presented the best performance. The obtained response showed an approximately threefold increase in cathodic peak current compared to the unmodified glassy carbon electrode. The achieved detection limit was 0.02 µM and the linear working range was evaluated from 40 to 150 µM, revealing a notable increment in peak current as the IBP concentration increased. In the interfering test, the GCE-Nb₂O₅ nanosheets showed an excellent resolution of simultaneous detection of IBP, dopamine, uric acid, ascorbic acid, and caffeine.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832543","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}

{"title":"Erratum: Chemically Deposited Boron-Doped Diamond Screen-Printed Electrodes for the Detection of Manganese","authors":"Larissa M. A. Melo,&nbsp;Elena Bernalte,&nbsp;Robert D. Crapnell,&nbsp;Marian Vojs,&nbsp;Marian Marton,&nbsp;Michal Hatala,&nbsp;Rodrigo A. A. Muñoz,&nbsp;Wallans T. P. dos Santos,&nbsp;Craig E. Banks","doi":"10.1002/elan.70019","DOIUrl":"10.1002/elan.70019","url":null,"abstract":"<p>In the original article, there is a mistake to Figure 1e,f. The correct figure is shown below.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/epdf/10.1002/elan.70019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144815053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances of Ni-Based Electrocatalysts for Coupled Small Molecular Anodizing of Hydrogen from Electrolysis of Water","authors":"Lu Fu,&nbsp;Min Liu,&nbsp;Lu Ga,&nbsp;Jun Ai","doi":"10.1002/elan.70032","DOIUrl":"10.1002/elan.70032","url":null,"abstract":"<p>Hydrogen, as a clean and renewable energy source, offers a solution to the global energy crisis and environmental challenges. Among the many methods of hydrogen production, electrolysis of water is an efficient and sustainable hydrogen production technology. However, at the anode of electrolyzed water, the slow kinetics of oxygen evolution reaction and high energy consumption limit the development of electrocatalytic water decomposition. In order to meet this challenge, researchers have explored and developed better-performing electrocatalysts and alternative oxidation reactions. This paper reviews the latest progress of coupled electrocatalytic hydrogen production strategies, such as oxidation of small molecules to produce value-added products, oxidation of urea and hydrazine as sacrificial agents to assist hydrogen evolution, and upgrading, recycling, and degradation of waste. The catalytic mechanism of nickel-based catalysts is mainly discussed. Finally, the development of energy-saving electrolysis of water for hydrogen production is prospected.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144815052","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}

{"title":"Mercury-Free Determination of Lead in Water by Cloud Point Extraction and Anodic Stripping Voltammetry","authors":"Vivian M. Flaum,&nbsp;Dustyn C. Weber,&nbsp;Karen A. Gonzalez,&nbsp;Cory A. Rusinek","doi":"10.1002/elan.70013","DOIUrl":"10.1002/elan.70013","url":null,"abstract":"<p>The toxicity of metal ions, such as lead (Pb²⁺) and cadmium (Cd²⁺), has been a worldwide issue since the 1970s. For Pb²⁺ specifically, chronic exposure via drinking water can have lasting health effects. While inductively coupled plasma-mass spectrometry (ICP-MS) and atomic absorption spectroscopy (AAS) are the most common instruments used for the detection of Pb²⁺, electrochemical methods like square wave anodic stripping voltammetry (SWASV) have classically shown promise. However, the determination of metals in a real sample matrix typically requires pretreatment and/or extraction of the analyte from the sample itself. Cloud point extraction (CPE) is a sustainable technique that can be used as a solventless substitute for liquid–liquid or solid-phase extraction. While typically coupled to AAS detection, the applicability of CPE to electroanalysis is still not well understood, nor fully optimized. In this work, CPE was used to isolate Pb²⁺ from water samples for analysis by SWASV with a bismuth-coated glassy carbon (Bi-GC) electrode. This is the first report coupling CPE to electroanalytical detection of trace metals in the absence of mercury (Hg). In addition, a back extraction (BE) step was incorporated to recover Pb²⁺ from the surfactant-rich phase, which resulted in a more sensitive and accurate method. High extraction efficiency was achieved and theoretical limits of detection (LOD) of 2.6, 0.81, and 1.7 μgL⁻¹ were obtained with deposition times (<i>t</i>_<i>dep</i>) of 1, 2, and 3 min, respectively. The optimized CPE-SWASV procedure for Pb²⁺ was selective; only manganese (Mn²⁺) was identified as an interferant. Measurements in more complex water samples were also completed. Overall, this innovative CPE-SWASV approach offers a sensitive, cost-effective, and sustainable alternative to Hg-based electrochemical quantification of Pb²⁺.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/epdf/10.1002/elan.70013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical Analysis Reveals the Chemiluminescence Processes of Coelenterazine to Deprotonated Coelenteramide","authors":"Yoshihiro Ohmiya,&nbsp;Ryo Nishihara,&nbsp;Tomoyuki Kamata,&nbsp;Michinori Sumimoto,&nbsp;Dai Kato","doi":"10.1002/elan.70029","DOIUrl":"10.1002/elan.70029","url":null,"abstract":"<p>Coelenterazine is the most common imidazopyrazinone-based luciferin in marine bioluminescence organisms. The electrochemical main peaks of coelenterazine are observed at approximately around 0.12 and 0.62 Vs in the cyclic voltammetry curve. Theoretical analysis suggests that coelenterazine is converted to the coelenteramide around 0.12 V, and the coelenteramide is deprotonated at around 0.62 V. These approaches can reveal the possible excited states of coelenteramide but do not consistently enable the enzymatic bioluminescence reaction to be traced.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/epdf/10.1002/elan.70029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and Theoretical Investigation of Flunitrazepam Electrochemical Behavior on Screen-Printed Electrodes: Low-Cost Strategy for Forensic Applications","authors":"Ellem F. Lima,&nbsp;Jaciara S. Silva,&nbsp;Tarciso S. Andrade-Filho,&nbsp;Raquel G. Rocha,&nbsp;Rodrigo A. A. Muñoz,&nbsp;Paulo T. Garcia","doi":"10.1002/elan.70031","DOIUrl":"10.1002/elan.70031","url":null,"abstract":"<p>The issue of drink spiking has attracted considerable worldwide attention, generating widespread public concern and fear. This practice entails the unsuspecting or willing ingestion of a substance that has been secretly introduced into a beverage. Flunitrazepam (FLU) is an important drug used for this purpose. Herein, commercial screen-printed electrodes (SPEs) were used for detecting FLU in spiked beverage samples (mineral water, beer, red wine, Brazilian sugarcane and jambu spirit, and cashew juice). Computational methods revealed that the interaction between the analyte and the working electrode surface occurs through dispersion, applying the third-order Self-consistent Charge Density Functional Tight-Binding (SCC-DFTB) methodology. Under optimized square wave voltammetry (SWV) conditions, linear range from 4.8 to 14.4 mg L⁻¹ and limits of detection (LOD) and quantification (LOQ) values were obtained at 0.01 and 0.04 mg L⁻¹, respectively. Recovery values (80%–85%) for FLU in sugarcane and jambu spirit samples, achieved through the standard addition method, attested the high performance of proposed method.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/epdf/10.1002/elan.70031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Electrochemical Sensing Platform Based on Mixed Oxide SiO2/Al2O3/Sb2O5 for Determination of Vitamin D3","authors":"Julia Oliveira Fernandes,&nbsp;Cassiano Augusto Rolim Bernardino,&nbsp;Francisco Walison Lima Silva,&nbsp;Gustavo Zanon de Moraes Goes de Oliveira,&nbsp;Luiara Rosa Cavalcanti,&nbsp;Claudio Sabbatini Capella Lopes,&nbsp;Bernardo Ferreira Braz,&nbsp;Claudio Fernando Mahler,&nbsp;Ricardo Erthal Santelli,&nbsp;Braulio Soares Archanjo,&nbsp;Emerson Schwingel Ribeiro,&nbsp;Fernando Henrique Cincotto","doi":"10.1002/elan.70030","DOIUrl":"10.1002/elan.70030","url":null,"abstract":"<p>Vitamin D is essential for health, and its quantification in supplements is important for immune support and disease prevention. The aim of this study was to develop an electrochemical sensor based on a glassy carbon electrode modified with the ternary oxide SiO₂/Al₂O₃/Sb₂O₅ for the determination of vitamin D3 in dietary supplements. The material was characterized by scanning electron microscopy, specific surface area analysis, and pore volume and diameter measurements. The analyses revealed spherical irregular particles, a high surface area of 339 m² g⁻¹, a pore volume of 0.19 cm³ g⁻¹, and an average pore diameter of 1.14 nm. These features enhance analyte adsorption and increase the electroactive area of the sensor. The electrochemical study, performed using cyclic voltammetry and differential pulse voltammetry, showed a shift in the oxidation potential of vitamin D₃ from +0.7 V (bare GCE) to +0.5 V with the modified electrode, along with a 65% increase in peak current, indicating a significant electrocatalytic effect. The sensor exhibited high selectivity and excellent sensitivity, with a detection limit of 0.12 µmol L⁻¹ and a linear range from 0.67 to 50.0 µmol L⁻¹. Additionally, no significant interference from other fat-soluble vitamins (A, E, and K) was observed. Therefore, the developed sensor proved to be effective for the trace-level determination of vitamin D3 in commercial supplement samples.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773681","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}

{"title":"An Overview of Recent Developments on Electrodes Modified with Bacteriophages","authors":"Katarzyna Szot-Karpińska","doi":"10.1002/elan.70026","DOIUrl":"10.1002/elan.70026","url":null,"abstract":"<p>Viruses are small replicators. To survive, they need a host that can be any form of life, from simple microorganisms like bacteria to more sophisticated organisms like plants, animals and humans. They are responsible for various infectious diseases, causing health, economic and social problems. Nonetheless, there are some species of viruses, such as bacteriophages (phages for short), from which we can benefit. Phages are viruses of bacteria. Their application is undergoing a renaissance, as they can be applied in medicine as an alternative to antibiotics (phage therapy) or diagnostics as an alternative to antibodies. Due to the latter, the phages have caught the attention of electroanalysts for being used as biorecognition elements on electrode surfaces. Thus, the intrinsic properties of phages for recognition of specific species of bacteria are utilised for sensing microorganisms, while the possibility of phages’ genetic modification has enabled them to be used to detect disease markers or for the preparation of new biomaterials. This mini-review presents an overview of the latest achievements in this field, demonstrating the broad application of phages for developing new biosensing platforms and energy storage devices.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751242","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}

{"title":"Fast-Scan Anodic Stripping Voltammetry for the Ecofriendly Detection of Anticancer Perillyl Alcohol Using Activated Graphite Sensor","authors":"Mona Elfiky,&nbsp;Maie Mousa,&nbsp;Nehal Salahuddin","doi":"10.1002/elan.70018","DOIUrl":"10.1002/elan.70018","url":null,"abstract":"<p>Perillyl alcohol (POH) is a natural compound presented in essential oils extracted from plants, recognized for its capacity to stimulate apoptosis in tumor cells while leaving normal cells unharmed. The present study has established a square-wave adsorptive anodic stripping voltammetric (SW-AdASV) technique for the detection of POH in both bulk, and biological fluids, utilizing an activated graphite sensor (AGPS). The electrochemical oxidation performance of POH was studied via cyclic voltammetry and subsequently optimized with SW-AdASV technique. Under the standard operational conditions, linear calibration curves for POH were obtained within concentration ranges of 0.001–0.013 nM and 0.003–0.018 nM. The detection limits (LODs) for bulk and human serum were evaluated to be 0.3 pM and 0.9 pM, respectively. Moreover, The AGPS effectively detected POH concentrations in human serum during routine analyses, with no interference from other serum components. Additionally, it demonstrated satisfactory repeatability, reproducibility, and a storage stability of 94.54%.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751204","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}

{"title":"Cover Picture: (Electroanalysis 8/2025)","authors":"","doi":"10.1002/elan.70035","DOIUrl":"10.1002/elan.70035","url":null,"abstract":"<p>Cover picture provided by Dr. Elena Benito-Peña and Dr. Susana Campuzano. <i>Electroanalysis</i> covers all branches of electroanalytical chemistry, including both fundamental and application papers as well as reviews dealing with analytical voltammetry, potentiometry, new electrochemical sensors and detection schemes, nanoscale electrochemistry, advanced electromaterials, nanobioelectronics, point-of-care diagnostics, wearable sensors, and practical applications.\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.70035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}