Hybrid electrochemical sensor platform for capsaicin determination using coarsely stepped cyclic squarewave voltammetry
| Autor: | Kristin Imenes, Sindre Søpstad, Erik A. Johannessen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Instrumentation Biomedical Engineering Biophysics Biosensing Techniques 02 engineering and technology Electrochemistry 01 natural sciences Adsorptive stripping voltammetry Electrodes Voltammetry Detection limit business.industry 010401 analytical chemistry Electrochemical Techniques General Medicine 021001 nanoscience & nanotechnology Carbon Flexible electronics 0104 chemical sciences Electrochemical gas sensor Electrode Optoelectronics Adsorption Capsaicin 0210 nano-technology business Biotechnology |
| Zdroj: | Biosensors & bioelectronics |
| ISSN: | 0956-5663 |
| DOI: | 10.1016/j.bios.2018.09.036 |
| Popis: | This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. A small, standalone electrochemical hybrid sensor platform, combining flexible electronics and screen-printed electrodes, is demonstrated in the determination of capsaicin through adsorptive stripping voltammetry. The sensing scheme was simplified to be compatible with a low-cost device. The simplification involved eliminating the need for additional modification of the electrode and employing a coarsely stepped squarewave voltammetry, a technique which is applicable with less sophisticated instrumentation. This architecture was found to be suitable for concentrations up to at least 5000 µM with a detection limit of 1.98 µM. The screen-printed carbon graphite electrodes were made reusable through an ethanol rinsing protocol. The effect of ethanol/buffer volumetric ratio in the test sample was shown to greatly influence the analytical data, and a fixed 10% (v/v) was chosen as a compromise between signal-to-noise ratio and not exceeding the solubility limit of the desired upper range. |
| Databáze: | OpenAIRE |
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