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 |
|---|---|
| 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
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