Abstract
Oil analysis for the case of quinizarin in methyllaurate is demonstrated with a disposable carbon microsphere - polystyrene composite electrode. Oxidation and reduction of quinizarin are observed as three-phase boundary processes at the immiscible oil | water | carbon interface. Randomly packed glassy carbon microspheres (2-12μm diameter) held together with a polystyrene binder (ca. 0.1% by weight) are immobilized onto a pencil lead electrode and used for electrochemical oil analysis. Pore-filling with oil is optimised for voltammetric detection and fluorescence spectroscopy is employed to support the mechanistic analysis based on voltammetry. Future applications for a wider range of oils and additives are proposed.
Original language | English |
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Pages (from-to) | 1043-1049 |
Number of pages | 7 |
Journal | Electroanalysis |
Volume | 27 |
Issue number | 4 |
Early online date | 12 Feb 2015 |
DOIs | |
Publication status | Published - Apr 2015 |
Keywords
- Anti-oxidant
- Biofuel
- Carbon microspheres
- Oil analysis
- Quinizarin
- Sensor
- Surface tension