Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"Square wave voltammetry"”.
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Fast Fourier transform square wave voltammetry
… as a.unique digital data handling tool for square wave voltammetry. Theoretical square wave voltammogra.ms were examined to study the effect of experimental parameters in the spatial frequency domain. A new method was developed to determine truncation frequencies. A₀, the first spatial …
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Square-wave voltammetry detection for capillary electrophoresis
… this instrumentation, an ECD system based on square-wave voltammetry was developed (CE-SWV). Detection limits obtained with CE-SWV for neurotransmitters (150 nM, S/N = 3) were comparable to those obtained using more fragile and complex amperometric CE detection systems. While CE-SWV worked …
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Electrochemical impedance modelling of the reactivities of dendrimeric poly(propylene imine) DNA nanobiosensors
… electrochemical impedance spectroscopy. Cyclic voltammetry (CV), differentia pulse voltammetry (DPV), square wave voltammetry (SWV) and electrochemical impedance spectroscopy (EIS) techniques were used to study and model the electrochemical reactivities of the nanomaterials on glassy carbon …
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Cytochrome C biosensor for the determination of trace level arsenic and cyanide compounds
… The sensitivity as calculated from cyclic voltammetry (CV) and square wave voltammetry (SWV), for each analyte in phosphate buffer (pH= 7) was found to be (1.087- 4.488 ×10-9 M) and the detection limits ranging from 0.0043- 9.1 μM. These values represent a big improvement over the current …
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Development of a Multi-Component Biosensor for Recombinase Polymerase Amplification-CRISPR/Cas12a-Based Detection of Fusarium oxysporum f. sp. cubense tropical race 4
… detection, and electrochemical square wave voltammetry (SWV) with targeted integration into a microfluidic system for amplification and detection within a compact heating unit. The research was organized into several key phases to achieve the thesis aim. First, a microneedle …
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Jednoduchý elektrochemický DNA biosenzor pro detekci poškození DNA způsobeného UV zářením
… combination of several electrochemical technics: square-wave voltammetry (SWV) for direct monitoring of DNA base oxidation and cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), as non-direct methods, using redox-active indicator [Fe(CN)6]4-/3- . CV and EIS, which allow …
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The Effects of Nonionic Surfactants on the Tris(2,2'-Bipyridl) Ruthenium(Ii)-Tripropylamine Electrochemiluminescence System
… (0.2M potassium phosphate) solution as found by square wave voltammetry. This oxidation potential does not change when nonionic surfactants are added to the solution, which suggested that the red shifts in the ECL spectra are caused by a stabilization of the ligand π* orbitals in the …
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The development of an electrochemical sensing device for controlled drugs.
… of voltammetric analyses of controlled drugs. A square wave voltammetric analysis of the novel psychoactive substance benzyl-piperazine is reported here, representing the first time this analysis has been established. A limit of detection of 6 μM was achieved, and resolution against the similar …
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The use of cyclodextrin template-based metal oxide nanomaterials in the development of electrochemical sensors for phenolic endocrine disruptor compounds
… (ATR-FTIR), X-ray diffraction (XRD), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA). The TEM shows that the surface morphology has no difference between nanoparticles prepared in the presence and absence of beta-cyclodextrin β-CD), amorphous …
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Otimização de um eletrodo de carbono vítreo modificado com nanotubos de carbono para detecção voltamétrica do fungicida carbendazim.
… with carbon nanotubes multiwalled (GCE-MWCNTM). Square wave voltammograms of the fungicide carbendazim (MBC) were recorded and the results showed the feasibility of building a GCE-MWCNTM (1.0 mg L-1) dispersed in water using acetate buffer ( pH 4.7) and sulfuric acid (pH 1.0) as supporting …
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A low-cost, handheld potentiostat device capable of high-resolution measurements and IOT connectivity
… a lab-grade potentiostat (PalmSens4) in Cyclic Voltammetry (CV), chronoamperometry (CA), Square Wave Voltammetry (SWV), and Open Circuit Potential (OCP) measurements. Both devices were connected to standard glossy carbon Screen-Printed Electrodes (SPEs) that were immersed in a solution of …
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Electrochemical sensor interface
… sensors at the point of use through voltammetry. It can perform a range of voltammetric tests, including cyclic voltammetry, square wave voltammetry and generator collector voltammetry. The data acquisition system interfaces to a smartphone, operates from a rechargeable battery and is …
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Sensing at nanostructures for agri-food and enviromental applications
… applied in combination with nanoelectrochemical square wave voltammetry to detect nano-concentrations of neonicotinoid pesticides. The enhanced sensitivity and minimum sample preparation requirements provide tremendous opportunities for food safety and security sectors. An impedimetric …
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DNA based biosensors for environmental and medical applications
… the guanine oxidation peak, was measured through Square Wave Voltammetry (SWV). Moreover, the toxicity of some selected surfactants was investigated both in sea water and tap water, and data were compared to those obtained in acetate buffer. The interaction between surfactants and Calf Thymus DNA …
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Advanced Electrochemical Analysis for Complex Electrode Applications
… properties. Voltammetric techniques of cyclic voltammetry (CV), square wave voltammetry (SWV) and Fourier transformed large amplitude ac voltammetry (FTACV) have been utilised to examine these reactions. Chapter 3 reports the investigation of catechol oxidation and subsequent polymerisation …
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Novel Electrochemical Methods for Acidity Monitoring: Theory, Design and Application
… and developed for performing measurements using square wave voltammetry. Chapter 1 introduces the motivation of this project, the current development of electrochemical sensors, and the basic theory and techniques of electrochemistry concerned within the thesis. The existing development of …
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Development of stationary phase materials and methods for analysis of pharmaceuticals via high-performance liquid chromatography and electrochemical detection
… (0.68 µg/mL) in a non-aqueous medium using square wave voltammetry (SWV). The method was extended to the detection of the C12 homolog in three ophthalmic formulations, and the results were validated by HPLC. The chromatographic separation of BAK homologs (C12, C14, C16, and C18) was carried …
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Electroanalytical chemistry for biological and environmental applications
… value of root(Dr.Dz) affords a theoretical waveshape with reasonable agreement between theory and experiment. Potential step chronoamperometry then determined separate values for Dr and Dz, with the resulting values affording an anisotropic ratio of 1.7, suggesting radial diffusion dominance …
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