Electroanalysis最新文献_第10页

Highly sensitive electrochemical determination of chemical oxygen demand by carbon-capsulated CuOx derived from Cu foam supported Cu-MOF 利用泡沫铜支撑的 Cu-MOF 衍生的碳封接 CuO x 进行高灵敏度的化学需氧量电化学测定

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-25 DOI: 10.1002/elan.202300361

Pei Li, Yu Yan, Yining Sun, Qing Chang, Yuqun Xie, Guodong Jiang

{"title":"Highly sensitive electrochemical determination of chemical oxygen demand by carbon-capsulated CuOx derived from Cu foam supported Cu-MOF","authors":"Pei Li, Yu Yan, Yining Sun, Qing Chang, Yuqun Xie, Guodong Jiang","doi":"10.1002/elan.202300361","DOIUrl":"10.1002/elan.202300361","url":null,"abstract":"Efficient detection of chemical oxygen demand (COD) is crucial for effective pollution prevention. Traditional Cu-based electrodes, widely utilized for COD sensors suffer from issues related to low activity and stability. This study introduced a novel approach by employing a copper foam-supported metal-organic frameworks (Cu-MOF), synthesized through a solvothermal method, which is subsequently pyrolyzed to yield a carbon-capsulated CuOx/Cu foam electrode. Cyclic voltammetry analysis demonstrated that the carbon-capsulated CuOx/Cu foam electrode exhibited superior redox activity, notably generating an increased amount of Cu(III) species. This enhancement significantly contributed to the electrocatalytic oxidation of organic compounds. The developed electrode demonstrated a wide linear detection range of 5–600 ppm, with a low detection limit of 0.96 ppm (S/N=3) for COD sensing. Notably, the sensor exhibited excellent anti-interference capabilities, desirable reproducibility, and stability. The proposed method was successfully applied to determine COD in real water samples. Comparative analysis with the standard potassium dichromate method revealed high accuracy and a low relative error (2.89 %–6.72 %). This innovative approach holds promise for rapid and accurate COD detection, presenting a valuable contribution to environmental monitoring and water quality assessment.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139159424","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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Advances in the noninvasive and minimally invasive sample collection for wearable electrochemical sensors 用于可穿戴式电化学传感器的无创和微创样本采集技术的进步

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-25 DOI: 10.1002/elan.202300385

Danfeng Lu, Chenxi Yang, Luyang Chen, Congjun Cao, Weimin Xia, Guanglei Li, Dan Wen

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Application of ionic liquids and various carbon materials in reference electrodes with carbon paste-based transducers 离子液体和各种碳材料在基于碳浆的传感器参比电极中的应用

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-21 DOI: 10.1002/elan.202300343

Julia Kuczak, Wiktoria Woszczyk, Małgorzata Pazik, Chuan Li Lee, Bin Mohd Sahfani Mohd Nor Hafizuddin, Kit Ling Chin, Ilona Grabowska-Jadach, Renata Toczyłowska-Mamińska, Paik San H'ng, Łukasz Górski

{"title":"Application of ionic liquids and various carbon materials in reference electrodes with carbon paste-based transducers","authors":"Julia Kuczak, Wiktoria Woszczyk, Małgorzata Pazik, Chuan Li Lee, Bin Mohd Sahfani Mohd Nor Hafizuddin, Kit Ling Chin, Ilona Grabowska-Jadach, Renata Toczyłowska-Mamińska, Paik San H'ng, Łukasz Górski","doi":"10.1002/elan.202300343","DOIUrl":"10.1002/elan.202300343","url":null,"abstract":"In this article it is proved that carbon pastes with ionic liquids (ILs) are a promising material for transducers of reference electrodes, which favors their miniaturization. Two ILs were used: 1-(2-hydroxyethyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (IL1) and 1-(2-methoxyethyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (IL2). They acted both as a binder of carbon paste and potential-determining component. ILs were also used in polymeric membrane of reference electrodes what ensured continuity of IL phase between carbon paste and the polymeric membrane and resulted in enhancement of electrode potential stability. It was shown that application of IL as a carbon paste binder is superior to conventional plasticizer and allows for significant increase of reference electrode potential stability. Different types of carbon materials were also tested during research: commercialy available graphite powder and graphene oxide obtained from waste biomass – palm kernel shells. It was observed that both the type of carbon paste material and IL influences reference electrode work parameters. Utilization of IL with less lipophilic cation resulted in higher potential stability of the reference electrodes. Application of graphite paste-based transducers resulted in higher potential stability of reference electrodes in sodium perchlorate and TMA chloride solutions while using palm kernel shell graphene oxide paste – based transducers caused enhancement of reference electrode long-term potential stability. The results indicate biomass-derived graphene oxide can be successfully applied as a construction material of reference electrode.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 4","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951723","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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Voltammetric approach to measuring free acid in anhydride and ester based on benzoquinone electrochemical reduction 基于苯醌电化学还原测量酸酐和酯中游离酸的伏安法

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-20 DOI: 10.1002/elan.202300362

Yuhong Liu, Mi Lin, Jianguo Wang

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A facile and sensitive method of analysis for the determination of paracetamol on a boron doped diamond electrode modified with carbon based nanomaterials 用碳基纳米材料修饰的掺硼金刚石电极测定扑热息痛的简便灵敏分析方法

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-20 DOI: 10.1002/elan.202300240

Ayşegül Kutluay Baytak, Fikriye Gezen, Mehmet Aslanoglu

{"title":"A facile and sensitive method of analysis for the determination of paracetamol on a boron doped diamond electrode modified with carbon based nanomaterials","authors":"Ayşegül Kutluay Baytak, Fikriye Gezen, Mehmet Aslanoglu","doi":"10.1002/elan.202300240","DOIUrl":"10.1002/elan.202300240","url":null,"abstract":"This study presents the development of a facile and sensitive method of analysis for the determination of paracetamol. For this purpose, a boron doped diamond electrode (BDDE) was modified with a composite of carbon nanotubes (CNT), carbon nanofibers (CNF) and carbon black nanoballs (CNB). The voltammetric properties of paracetamol were studied, compared and discussed on unmodified BDDE, CNB/BDDE, CNF/BDDE, CNT/BDDE, CNB@CNF/BDDE, CNF@CNT/BDDE and CNF@CNB@CNT/BDDE. An increase in peak response (Ip) and a dramatic decrease in peak separation (ΔEp) were observed at electrodes in an order from bare BDDE to CNB/BDDE, CNF/BDDE, CNT/BDDE, CNB@CNF/BDDE, CNF@CNT/BDDE and CNF@CNB@CNT/BDDE. This clearly showed that the composite material of CNF@CNB@CNT provided an excellent surface on BDDE leading to a fast electrode reaction of paracetamol. Interestlingly, the amount composite layer on the voltammetry of paracetamol also caused a remarkable decrease in ΔEp and resulted in high electrocatalytic activity. The detection of paracetamol based on the BDDE modified with a composite of CNF@CNB@CNT exhibited stability, excellent selectivity and good sensitivity, with a low detection limit of 0.47±0.002 nM (based on 3sb/m) and wide linear range of 1.5 nM–200 nM. These results demonstrate that CNF@CNB@CNT/BDDE can serve as an ideal voltammetric platform for constructing a paracetamol sensor. The proposed electrochemical platform (CNF@CNB@CNT/BDDE) was also successfully applied for the determination of paracetamol in pharmaceuticals and body fluids.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955016","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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Single-nanoparticle electrochemical collision for study of the size-dependent activity of Au nanoparticles during hydrogen evolution reaction 利用单纳米粒子电化学碰撞研究金纳米粒子在氢气进化反应中的大小依赖性活性

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-20 DOI: 10.1002/elan.202300354

Yi-Yan Bai

{"title":"Single-nanoparticle electrochemical collision for study of the size-dependent activity of Au nanoparticles during hydrogen evolution reaction","authors":"Yi-Yan Bai","doi":"10.1002/elan.202300354","DOIUrl":"10.1002/elan.202300354","url":null,"abstract":"Identifying the intrinsic electrocatalytic activity of an individual nanoparticle is essential to reveal the structure-activity relations of catalysts. However, it is challenging as the performance of catalysts is typically evaluated with ensembles, providing an elusive averaged response of complex catalyst-modified electrodes. Herein, a single-nanoparticle electrochemical collision (SNEC)-based method was employed to characterize the electrocatalysis of citrate-capped Au NPs with six different particle sizes, and investigate the size-dependent electrocatalytic activity of Au NPs toward hydrogen evolution reaction (HER) at the single-particle level. Results showed that the geometric activity of Au NPs showed a decreasing trend as the size increased from 5 nm to 40 nm, consisting with the linear sweep voltammetry (LSV) data that the onset potentials and potentials to reaching at HER currents of 50 μA cm−2 shifted negatively as the size of Au NPs increased. Also noteworthy is that the measured geometric activity of single Au NP toward HER was 5~6 orders of magnitude higher than the ensemble data derived from the LSV tests. The extraordinary enhancement of catalytic activity is believed to originate from the high accessible surface area of monodispersed Au NPs. Hence, the proposed SNEC-based method could investigate the intrinsic electrocatalytic activity of NPs in solution at the single-particle level, and achieve true size-activity correlation, which may provide effective guidance for the rational design of advanced electrocatalysts.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955791","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 12/2023) 封面图片：（电分析 12/2023）

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-12 DOI: 10.1002/elan.202381201

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Electrochemical cellular biosensor combined with fluorescence microscopy: An investigation of subtle changes in response of cells to a drug 电化学细胞生物传感器与荧光显微镜相结合--研究细胞对药物反应的微妙变化

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-10 DOI: 10.1002/elan.202300210

Seyedyousef Arman, Richard D. Tilley, Katharina Gaus, J. Justin Gooding

{"title":"Electrochemical cellular biosensor combined with fluorescence microscopy: An investigation of subtle changes in response of cells to a drug","authors":"Seyedyousef Arman, Richard D. Tilley, Katharina Gaus, J. Justin Gooding","doi":"10.1002/elan.202300210","DOIUrl":"10.1002/elan.202300210","url":null,"abstract":"This study presents the combination of electrochemical cell based biosensor and fluorescence microscopy on a single platform to track biomolecular processes contributing to the morphology changes of the cells. Initial experiments demonstrate that using interdigitated electrodes where the gold microfingers were comparable in width and spacing to a single cell have the optimal sensitivity in the final electrochemical cell based-sensing device. This was determined by measuring the cell index, based on the impedance analysis of bare and cell-covered microelectrodes. The fabrication of the electrodes on a glass substrate enabled the capture of high-resolution fluorescence microscopy images of single cells and related intracellular calcium release inside the HeLa cells via a window incorporated into the gold microelectrode design. As an illustration of the enhanced capability of the combined approach over traditional impedance cellular assay, the opto-electric assay was utilized as a functional readout for G protein couple receptor activation. The simultaneous examinations of cells stimulated with histamine demonstrated an association between time courses of changes in cytosolic calcium concentration and reductions in cell-cell adhesions.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.202300210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138584823","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}

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Electrochemical determination of carbendazim in juice samples using carbon composite electrode modified with ion-exchange resin 使用离子交换树脂修饰的碳复合电极电化学测定果汁样品中的多菌灵含量

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-10 DOI: 10.1002/elan.202300205

Maurício A. P. Papi, Márcio F. Bergamini, Luiz H. Marcolino-Junior

{"title":"Electrochemical determination of carbendazim in juice samples using carbon composite electrode modified with ion-exchange resin","authors":"Maurício A. P. Papi, Márcio F. Bergamini, Luiz H. Marcolino-Junior","doi":"10.1002/elan.202300205","DOIUrl":"10.1002/elan.202300205","url":null,"abstract":"This work describes a carbon composite modified electrode (CCME) easily prepared using a simple mixture of a commercial cation exchange resin (Amberlite IR 120H) as modifier, graphite powder and paraffin, which was successfully used for spontaneous preconcentration and voltametric determination of carbendazim (CBZ) in juice samples. Parameters such as amount of resin used in the composition of the electrode, pH and preconcentration time as well as instrumental parameters of differential pulse voltammetry (DPV) were studied. Under optimized conditions, the proposed sensor shows to be able to preconcentrate CBZ at an open circuit potential (OCP) condition and presented the highest analytical response in comparison to the unmodified electrode. An analytical curve was obtained for the CBZ determination employing the proposed CCME and showed a linear dynamic range (LDR) between 80.0 nmol L−1 to 2.0 μmol L−1, with a LOD of 19 nmol L−1 and LOQ of 65 nmol L−1. The effect of concomitants on the voltametric response was evaluated by addition and recovery study and a good selectivity was found. The proposed sensor was successfully applied for the determination of CBZ in spiked mango juice samples without any pretreatment.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138584750","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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Electrochemical detection of tryptophan in fish and pharmaceutical supplement at glassy carbon electrode modified with Fe doped ZnO nanoparticle 用掺铁氧化锌纳米粒子修饰的玻璃碳电极电化学检测鱼肉和药用补品中的色氨酸

IF 3 3区化学

Electroanalysis Pub Date : 2023-12-06 DOI: 10.1002/elan.202300237

Toleshi Teshome, Shimeles Addisu Kitte, Abera Gure, Guta Gonfa

{"title":"Electrochemical detection of tryptophan in fish and pharmaceutical supplement at glassy carbon electrode modified with Fe doped ZnO nanoparticle","authors":"Toleshi Teshome, Shimeles Addisu Kitte, Abera Gure, Guta Gonfa","doi":"10.1002/elan.202300237","DOIUrl":"10.1002/elan.202300237","url":null,"abstract":"The co-precipitation approach was employed in this study to create Fe doped ZnO (Fe-ZnO) nanoparticles (NPs). To characterize the synthesized NPs, Ultra violet-Visible (UV-Vis) spectroscopy, X-ray diffraction (XRD), fourier transform infrared (FT-IR), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) were used. Here, a novel electrochemical approach for the detection of tryptophan (Trp) using a glassy carbon electrode modified with Fe-ZnO NPs (Fe-ZnO/GCE) is demonstrated. The research findings revealed that Fe-ZnO/GCE enhanced the electron transfer rate of Trp oxidation. The sensitivity of Trp detection using Fe-ZnO/GCE in phosphate buffer solution (PBS) at pH 64.0 was significantly improved compared to bare GCE due to the electrocatalytic activity of Fe-ZnO NPs. Fe-ZnO/GCE exhibited a linear response with Trp concentrations ranging from 0.1 to 150 μM with the limit of detection (LOD) is 0.089 μM (3σ/m) and limit of quantification (LOQ) about 0.3 μM (10σ/m) using linear sweep voltammetry (LSV). The Fe-ZnO/GCE sensor was also effectively used to detect Trp in African catfish and multivitamin tablets. Trp analysis in real samples exhibited good recovery values of 89.60 to 99.15 %, demonstrating the accuracy and practicality of the method.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138596411","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