Determination of Tetracycline by Microdroplet Hydrodynamic Adsorptive Voltammetry Using a Multiwalled Carbon Nanotube Paste Rotating Disk Electrode |
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| Authors: | Ayesha Sultana Kazuto Sazawa Md. Saiful Islam Kazuharu Sugawara |
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| Affiliation: | 1. Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Toyama, Japan;2. Maebashi Institute of Technology, Maebashi, Japan |
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| Abstract: | A novel and simple method is proposed for the determination of tetracycline by adsorptive voltammetry in a droplet using a carbon nanotube paste rotating disk electrode (CNTP-RDE). An enhanced electrochemical oxidation response of tetracycline was observed in pH 8.2 supporting electrolyte by the addition of a long-chain cationic surfactant, such as benzyldimethyltetradecylammonium chloride (zephiramine). Under the optimized experimental conditions, the calibration curve was linear across a tetracycline concentration range from 1.0?×?10?7 to 2.0?×?10?6 M. The limit of detection and sensitivity were 4.0?×?10?8 M and 0.9358?A M?1, respectively. This method was successfully employed for the determination of tetracycline in milk samples. |
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| Keywords: | Adsorptive voltammetry microdroplet hydrodynamic adsorptive voltammetry tetracycline zephiramine |
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