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Electroanalytical Behaviour of a Nanoarray Self-Assembled Thiocholesterol Gold Electrode |
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| Authors: | Zhongping Yang Jean-Michel Kauffmann María-Isabel Acedo Valenzuela Sibel Özkan |
| Affiliation: | Institute of Pharmacy, Free University of Brussels (ULB), Campus plaine CP205/6, 1050 Brussels, Belgium, BE Department of Analytical Chemistry, Faculty of Science, University of Extremadura, Av. de Elvas s/n. 06071-Badajoz, Spain, ES Department of Analytical Chemistry, Faculty of Pharmacy, University of Ankara, Ankara, Turkey, TR |
| Abstract: | Thiocholesterol forms a self-assembled monolayer (SAM) on polycrystalline gold, offering a defect-rich hydrophobic surface. This SAM gold electrode has been exploited in batch and flow injection analysis (FIA) as it allows selective detection of hydrophobic analytes such as phenothiazines in presence of potentially interfering species such as ascorbic acid. Several phenothiazines have been investigated. Quantification has been achieved in FIA, in a broad linear concentration range: 0.5–100?μM. The stability of the modified electrode allows more than 500 sample injections in FIA. |
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