Electroanalysis

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Cảm Biến Điện Hóa Cho Định Lượng Nhạy Cảm Glyphosate Trong Hạt Ngô Dịch bởi AI
Electroanalysis - Tập 31 Số 5 - Trang 927-935 - 2019
Selene L. Cahuantzi‐Muñoz, Miguel A. González‐Fuentes, Luis Ortiz‐Frade, Eduardo Torres, Ştefan Ţălu, G. Trejo, Alia Méndez‐Albores
Tóm tắtĐiện cực graphite-epoxy (GE) được điều chỉnh bằng ống nano carbon nhiều lớp (MWCNTs) và peroxidase củ cải đường (GE/MWCNTs-HRP) đã được sử dụng để xây dựng một cảm biến glyphosate có hiệu suất trong dung dịch nước phụ thuộc vào hoạt động của enzyme. Để chuẩn bị cảm biến, MWCNTs đã được lắng đọng lên bề mặt GE bằng phương pháp điện di s...... hiện toàn bộ
Charge transfer across a conducting polypyrrole membrane separated by two electrolyte solutions
Electroanalysis - Tập 2 Số 8 - Trang 623-629 - 1990
Erkang Wang, Yuqing Liu, Zdeněk Samec, C. Dvořák
AbstractThis article describes anion transfer across a conducting polypyrrole membrane (PPM) using cyclic voltammetry with a four‐electrode system. The transfer process of both chloride and nitrate anions across the polypyrrole membrane used to separate two pools of electrolyte solutions has been studied. A wide potential window beyond 3 V was obtained, and well‐de...... hiện toàn bộ
Inhibition of Ru Complex Electrochemiluminescence by Phenols and Anilines
Electroanalysis - Tập 17 Số 7 - Trang 589-598 - 2005
Hua Cui, Feng Li, Ming‐Juan Shi, Yongqiang Pang, Xiangqin Lin
AbstractThe effect of 30 phenols and anilines on typical Ru complex electrochemiluminescence (ECL) was systematically investigated under different conditions. It was found that all the tested compounds showed an ECL inhibiting signal. The magnitude of ECL inhibition was related to the position of the substituting group in the benzene ring and decreased in the follo...... hiện toàn bộ
Edge Plane Pyrolytic Graphite Electrodes for Stripping Voltammetry: a Comparison with Other Carbon Based Electrodes
Electroanalysis - Tập 17 Số 8 - Trang 655-661 - 2005
Fr�d�ric Wantz, Craig E. Banks, Richard G. Compton
Manganese Detection with a Metal Catalyst Free Carbon Nanotube Electrode: Anodic versus Cathodic Stripping Voltammetry
Electroanalysis - Tập 24 Số 10 - Trang 1909-1914 - 2012
Wei Yue, Adam Bange, Bill L. Riehl, Bonnie D. Riehl, Jay M. Johnson, Ian Papautsky, William R. Heineman
AbstractAnodic stripping voltammetry (ASV) and cathodic stripping voltammetry (CSV) were used to determine Mn concentration using metal catalyst free carbon nanotube (MCFCNT) electrodes and square wave stripping voltammetry (SWSV). The MCFCNTs are synthesized using a Carbo Thermal Carbide Conversion method which results in a material that does not contain residual ...... hiện toàn bộ
Determination of Manganese in Natural Media by Anodic Stripping Voltammetry Using a Rotating Solid Silver Amalgam Electrode
Electroanalysis - Tập 21 Số 3-5 - Trang 274-279 - 2009
Ludovic Lesven, Silje M. Skogvold, Øyvind Mikkelsen, Gabriel Billon
AbstractDetection of Mn(II) using differential pulse anodic stripping voltammetry (DPASV) on solid silver amalgam electrode is introduced. A well‐defined peak for the oxidation of Mn(0) to Mn(II) was observed around −1.45 V in NH4Cl (0.05 M) solution. Concentrations down to 1 μg/L were measured in NH4Cl (0.05 M) with 900 s ...... hiện toàn bộ
Determination of Manganese by Cathodic Stripping Voltammetry on a Microfabricated Platinum Thin–film Electrode
Electroanalysis - Tập 29 Số 3 - Trang 686-695 - 2017
Wenjing Kang, Cory A. Rusinek, Adam Bange, Erin N. Haynes, William R. Heineman, Ian Papautsky
AbstractIn this work, we report on the determination of trace manganese (Mn) using cathodic stripping voltammetry (CSV) using a microfabricated sensor with a Pt thin‐film working electrode. While an essential trace metal for human health, prolonged exposure to Mn tends to gradually impair our neurological system. The potential sources of Mn exposure make it necessa...... hiện toàn bộ
Determination of manganese using the method of electrochemical enrichment
Electroanalysis - Tập 5 Số 7 - Trang 595-598 - 1993
V. Stąrá, M. Kopanica
AbstractManganese was determined by differential pulse voltammetry in pre‐enriched solution. The metal was first deposited on the surface of a hanging mercury drop electrode by electrolysis, and after a short oxidation interval, the reformed manganese(II) ions were determined by differential pulse cathodic polarization scan. The detection limit (with 120 seconds de...... hiện toàn bộ
Differential pulse cathodic stripping voltammetric determination of manganese(II) and manganese(VII) at the 1‐(2‐pyridylazo)‐2‐naphthol‐modified carbon paste electrode
Electroanalysis - Tập 9 Số 1 - Trang 45-51 - 1997
Soo Beng Khoo, Ming Koon Soh, Qiantao Cai, Miriam Rehana Khan, Si‐Xuan Guo
AbstractA carbon paste electrode modified with 1‐(2‐pyridylazo)‐2‐naphthol was fabricated and used to preferentially accumulate Mn(II) at open circuit. After medium exchange, the accumulated Mn(II) at the electrode surface was electrochemically oxidized. The hydrated MnO2 thus formed was then cathodical...... hiện toàn bộ
Ultrasonically Enhanced Voltammetric Analysis and Applications: An Overview
Electroanalysis - Tập 15 Số 5-6 - Trang 329-346 - 2003
Craig E. Banks, Richard G. Compton
AbstractUltrasonically enhanced voltammetric measurements have been successfully applied for the detection of a wide range of trace metals. These are reviewed and the beneficial effects of power ultrasound applied to electroanalysis highlighted, most notably the possibility for quantitative analysis in otherwise highly passivating media, where classical electrochem...
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