Use this URL to cite or link to this record in EThOS:
Title: Voltammetric sensing
Author: Lu, Min
Awarding Body: University of Oxford
Current Institution: University of Oxford
Date of Award: 2014
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Restricted access.
Access from Institution:
Electrochemical analysis using mercury electrodes has been a prominent methodology since the beginning of voltammetry, however, due to its toxic nature their use is being slowly phased out in favour of environmentally friendlier alternatives. In this thesis, carbon electrodes feature heavily as a means to provide a cheaper and non-toxic approach to voltammmetric sensing. Pulse techniques have been used for the sensitive detection of commonly studied analytes, including antimony and iron. A simple fabrication of a vibrating electrode is presented by modifying a commercially available vibrating toothbrush with platinum foil as a means to enhance mass transport for electroanalytical work. Finally, pH determination at carbon electrodes is investigated. Carbon electrodes have been proposed as a simple sensor for pH determination by exploiting the pH sensitive nature of surface quinone groups intrinsic within carbon edge-plane like sites. Using this approach, both EPPG and GC electrodes are suggested as new materials for pH determination and can be used in aqueous solutions over the pH range 1.0 to 13.0, as a cheap and simple alternative to the classic glass electrode.
Supervisor: Compton, Richard Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Physical & theoretical chemistry ; Electrochemistry and electrolysis ; Electroanalysis