Electroanalysis最新文献_第9页

Construction of an electrochemical platform with carbon nanotubes and aluminium doped zinc oxide nanoparticles for the sensitive determination of sunset yellow 利用碳纳米管和掺铝氧化锌纳米粒子构建用于灵敏测定日落黄的电化学平台

IF 2.7 3区化学

Electroanalysis Pub Date : 2024-04-15 DOI: 10.1002/elan.202400040

Bikhtiyar Omar Abdullah, Tuğçe Teker, Mehmet Aslanoglu

{"title":"Construction of an electrochemical platform with carbon nanotubes and aluminium doped zinc oxide nanoparticles for the sensitive determination of sunset yellow","authors":"Bikhtiyar Omar Abdullah, Tuğçe Teker, Mehmet Aslanoglu","doi":"10.1002/elan.202400040","DOIUrl":"10.1002/elan.202400040","url":null,"abstract":"Sunset yellow, a synthetic colorant and used to improve the texture and the appearance of food samples, can adversely affect humans. The development of a sensitive method to analyse food products for the accurate determination of sunset yellow is of importance for the level of risk to human health and thus food safety. The present study aimed to prepare a voltammetric method for the precise detection of sunset yellow content in a commonly consumed powdered beverage and pharmaceutical products. For this purpose, a sensitive method utilizing a voltammetric platform was constructed by modifying a glassy carbon electrode (GCE) with carbon nanotubes (MWCNTs) and aluminium doped zinc oxide (AZO). Cyclic voltammetry (CV) and electrochemical impedance spectroscopic (EIS) measurements indicated that the proposed voltammetric platform (GCE/MWCNTs/AZO) possessed high electro-active surface area and lower value of charge transfer resistance (Rct) and therefore, could serve as a promising sensing material. The GCE/MWCNTs/AZO system improved voltammetric behaviour of sunset yellow at an accumulation time of 210 s and indicated good electrocatalytic activity due to high synergistic effect between MWCNTs and AZO nanoparticles. This method of analysis exhibited a dynamic working range from 4.0×10−9 to 7.5×10−6 M with a limit of detection (LOD) of 9.5×10−10 M for sunset yellow. The GCE/MWCNTs/AZO system was successfully utilized for the electroanalysis of beverages and pharmaceuticals for detection of sunset yellow. Voltammetric measurements indicate that the GCE/MWCNTs/AZO system enables good accuracy and high precision for the determination of sunset yellow.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 10","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140613815","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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Cover Picture: (Electroanalysis 4/2024) 封面图片：（Electroanalysis 4/2024）

IF 3 3区化学

Electroanalysis Pub Date : 2024-04-09 DOI: 10.1002/elan.202480401

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Cover Picture: (Electroanalysis 4/2024) 封面图片：（Electroanalysis 4/2024）

IF 3 3区化学

Electroanalysis Pub Date : 2024-04-09 DOI: 10.1002/elan.202480401

引用次数: 0

A flexible GOx/PB/Au film biosensor for the detection of glucose 用于检测葡萄糖的柔性 GOx/PB/Au 薄膜生物传感器

IF 2.7 3区化学

Electroanalysis Pub Date : 2024-04-08 DOI: 10.1002/elan.202400092

Kaiwei Cai, Yin Bao, Yichen Liu, Bingling Li

{"title":"A flexible GOx/PB/Au film biosensor for the detection of glucose","authors":"Kaiwei Cai, Yin Bao, Yichen Liu, Bingling Li","doi":"10.1002/elan.202400092","DOIUrl":"10.1002/elan.202400092","url":null,"abstract":"Polystyrene (PS), a polymer material renowned for its notable optical and mechanical properties, as well as low cost and ease of processing, stands as one of optimal candidate for flexible electrode substrate materials. However, prevalent modification techniques such as lithography, electron beam evaporation, and plasma etching all entail the requirement for specialized equipment and precise operation, thereby significantly elevating the technical barrier. In this study, we introduce a chemical plating method to fabricate a gold film electrode, coupled with prussian blue (PB) and glucose oxidase (GOx), for the development of a glucose electrochemical biosensor. This process offers simplicity, cost-effectiveness, and feasibility under regular experimental conditions. The electrode surface is covered with numerous gold nanoparticles, effectively augmenting the actual electrode area and enhancing electron transfer efficiency. Remarkably, without the addition of sensitizing agents, the biosensor achieves highly sensitive glucose detection. The proposed biosensor exhibits a broad linear relationship in the concentration range of 0.005–1 mM, with a detection limit of 4.4 μM. Moreover, it exhibits favorable performance in detecting glucose levels in sweat samples, showcasing promising prospects for personal healthcare diagnostics.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 10","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579719","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

Ionic liquid and ZnO/carbon quantum dots derived from cat hair as an electrochemical sensor for ciprofloxacin in food samples: Experimental and cell-imaging studies 从猫毛中提取的离子液体和氧化锌/碳量子点作为食品样品中环丙沙星的电化学传感器：实验和细胞成像研究

IF 2.7 3区化学

Electroanalysis Pub Date : 2024-04-07 DOI: 10.1002/elan.202300398

M. Leticia Almada-Leyva, Eduardo D. Tecuapa-Flores, Liliana Margarita Garcia Rojas, Pandiyan Thangarasu

{"title":"Ionic liquid and ZnO/carbon quantum dots derived from cat hair as an electrochemical sensor for ciprofloxacin in food samples: Experimental and cell-imaging studies","authors":"M. Leticia Almada-Leyva, Eduardo D. Tecuapa-Flores, Liliana Margarita Garcia Rojas, Pandiyan Thangarasu","doi":"10.1002/elan.202300398","DOIUrl":"10.1002/elan.202300398","url":null,"abstract":"Ciprofloxacin (CIP) has been widely used to treat bacterial infections, generating biofluid residues and it endangers health via the food chain; thus, the determination of CIP is essential in food samples. In this work, CPE/ZnO/CQD was prepared from ZnO nanoparticles (ZnO NPs) and carbon quantum dots (CQD) derived from cat hair and modified the graphite carbon paste electrode (CPE); the above electrode sample was further modified by incorporating ionic liquid (IL) to give CPE/ZnO/CQD@IL. The above materials were employed as electrochemical sensors for the recognition of CIP in milk and eggs after the characterization by different analytical techniques (XRD, FT-IR, SEM, TEM, and EDS). The results show that the presence of nanoparticles in the CPE has improved the electrocatalytic properties, giving a greater heterogeneous electron transfer rate constant (k0=6.51×10−4 cm/s) for CPE/ZnO/CQD as compared to unmodified CPE (3.94×10−4 cm/s), and for CPE/ZnO/CQD/IL, with modification of sample by IL, the rate constant has been further increased to k0=8.34×10−4 cm/s. Thereafter, CPE/ZnO/CQD and CPE/ZnO/CQD@IL were employed for the detection of CIP in food samples such as milk and eggs, observing a maximum oxidation current for CIP at pH 3.0; the limit of detection (LOD) was 0.24, and 0.30 μM for CPE/ZnO/CQD, and CPE/ZnO/CQD@IL, respectively, and those values are much lower than those reported due to the synergistic effect generated by the combination of ZnO/CQD and IL. Furthermore, cell images were developed using ZnO/CQD and ZnO/CQD@IL in real samples like Saccharomyces cerevisiae cells in the presence of CIP.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 9","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.202300398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140580113","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}

引用次数: 0

Comparing thermoplastic electrode materials: Toward enhanced sensing of O2 and H2O2 in flow devices 比较热塑性电极材料：提高流动设备中 O 2 和 H 2 O 2 的传感能力

IF 2.7 3区化学

Electroanalysis Pub Date : 2024-04-07 DOI: 10.1002/elan.202400067

Kaylee M. Clark, Amanda E. Cherwin, Jason Boes, Matthew J. Russo, Charles S. Henry

{"title":"Comparing thermoplastic electrode materials: Toward enhanced sensing of O2 and H2O2 in flow devices","authors":"Kaylee M. Clark, Amanda E. Cherwin, Jason Boes, Matthew J. Russo, Charles S. Henry","doi":"10.1002/elan.202400067","DOIUrl":"10.1002/elan.202400067","url":null,"abstract":"Carbon composite electrodes often suffer from poor electrocatalytic activity and require complex, expensive, or time-consuming modifications to effectively detect certain analytes such as O2 and H2O2. Thermoplastic electrodes (TPEs) are a new class of composite electrodes, fabricated by mixing commercial graphite with a thermopolymer, that exhibit superior electrochemical properties to typical carbon composite electrodes. This work investigates the properties of TPEs using two thermopolymer binders – polycaprolactone (PCL) and polystyrene (PS) – with sanded and heat-pressed surface treatments. XPS and SEM analysis suggested that sanded TPEs have a higher density of graphitic edge planes and improved electrochemistry as a result. Electrochemical detection of O2 and H2O2 was demonstrated on sanded PS TPEs. Additionally, this work introduces the first use of a 3D-printed TPE template as part of a 3D-printed sensor module that is reversibly sealed with magnets as a proof-of-concept flow-based sensor for detecting H2O2.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 11","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.202400067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579808","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}

引用次数: 0

Study of the water electrolyzer with proton exchange membrane performance based on Ti current collectors charged with hydrogen 基于充有氢气的钛集流器的质子交换膜水电解槽性能研究

IF 3 3区化学

Electroanalysis Pub Date : 2024-04-06 DOI: 10.1002/elan.202400091

Matvey Sinyakov, Ruslan Mensharapov, Boris Ivanov, Dmitry Spasov, Adelina Zasypkina, Yuri Pak, Nataliya Ivanova

引用次数: 0

Nanostructured cobalt(II) phthalocyanine modified screen-printed electrodes for the determination of thiocyanate in human saliva 用于测定人体唾液中硫氰酸盐的纳米结构酞菁修饰丝网印刷电极

IF 2.7 3区化学

Electroanalysis Pub Date : 2024-04-05 DOI: 10.1002/elan.202400011

Vit Pavelka, Alexandros Ch. Lazanas, Myrto Sarigiannidou, Jan Hrbac, Mamas I. Prodromidis

{"title":"Nanostructured cobalt(II) phthalocyanine modified screen-printed electrodes for the determination of thiocyanate in human saliva","authors":"Vit Pavelka, Alexandros Ch. Lazanas, Myrto Sarigiannidou, Jan Hrbac, Mamas I. Prodromidis","doi":"10.1002/elan.202400011","DOIUrl":"10.1002/elan.202400011","url":null,"abstract":"Salivary thiocyanate is a biomarker of individual health that notably allows for the discrimination between smokers and non-smokers. Recent studies have also demonstrated its potential as a biomarker of cystic fibrosis, thus rendering the development of methods for its determination in saliva of immense importance. In response, we report on the development of graphite screen-printed electrodes (SPE) modified with cobalt(II) phthalocyanine nanosticks (CoPcNst), as low-cost and semi-disposable sensors for the determination of thiocyanate ion (SCN−) in human saliva. CoPCNst were synthesized and characterized using scanning electron microscopy, x-ray diffraction, as well as infrared and Raman spectroscopies. The results revealed a structural proximity to the recently identified J-polymorph. Compared with the electrode modified with commercial, beta-structure cobalt(II) phthalocyanine, the CoPc Nst/SPE provided four times better LOD and LOQ (0.49 and 1.62 μM) for thiocyanate determination by differential pulse voltammetry. The response was linear up to 20 μM SCN− (R2=0.996) and it was not affected by excess of common electro active compounds, such as ascorbic and uric acid. The analytical utility of CoPc Nst/SPE in human saliva is demonstrated.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 10","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140586870","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

A novel composite electrode based on graphene oxide/MnO2:h-MoO3 particles for square wave voltammetric determination of acetaminophen 基于氧化石墨烯/MnO 2 :h-MoO 3 颗粒的新型复合电极，用于对乙酰氨基酚的方波伏安法测定

IF 2.7 3区化学

Electroanalysis Pub Date : 2024-04-05 DOI: 10.1002/elan.202400042

Merve Aktürk, Zekerya Dursun

引用次数: 0

Potential enhancements in commercial glucose biosensors utilizing electrochemical faradaic spectroscopy: Analyzing the sum component in the EC’ mechanism 利用电化学法拉达光谱改进商用葡萄糖生物传感器的潜力：分析 EC 机制中的总和成分

IF 2.7 3区化学

Electroanalysis Pub Date : 2024-03-28 DOI: 10.1002/elan.202300329

Valentin Mirčeski, Martin Peacock, Leon Stojanov

{"title":"Potential enhancements in commercial glucose biosensors utilizing electrochemical faradaic spectroscopy: Analyzing the sum component in the EC’ mechanism","authors":"Valentin Mirčeski, Martin Peacock, Leon Stojanov","doi":"10.1002/elan.202300329","DOIUrl":"10.1002/elan.202300329","url":null,"abstract":"Herein we report the use of electrochemical faradaic spectroscopy in biosensors, with application on a commercially used first-generation glucose biosensor manufactured by Zimmer and Peacock. The mechanism for the glucose sensor was explained and approximated as an EC’ mechanism, where E is for electron transfer step, whereas C’ signifies catalytical chemical step. Experimental chronoamperograms in electrochemical faradaic spectroscopy are compared to chronoamperometry, where it was found that the sum component in electrochemical faradaic spectroscopy gives higher response, resulting in better sensitivity of the sensor. Theoretical simulations give an insight of the response in electrochemical faradaic spectroscopy for an EC’ mechanism and its dependence on different parameters (dimensionless electrode kinetic parameter, mid potential, dimensionless chemical kinetic parameter). For some specific set of parameters (large electrode and catalytic reaction kinetics), theoretical chronoamperograms in electrochemical faradaic spectroscopy can become similar to the experimental. The property of the sum component to have higher response in EC’ mechanism for specific parameters is not limited only for electrochemical faradaic spectroscopy. Exemplified with square-wave voltammetry, it is shown that other pulse techniques for an EC’ mechanism can also result with higher sum component. Hence, for better sensitivity in quantitative analysis in EC’ mechanism, one should quantify the sum component.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140325082","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