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Electrochemical Determination of Chemical Oxygen Demand Based on Boron-Doped Diamond Electrodeopen access
- Authors
- Latifah, Dian S.; Jeon, Subin; Oh, Ilwhan
- Issue Date
- Aug-2023
- Publisher
- KOREAN ELECTROCHEMISTRY SOC
- Keywords
- Chemical oxygen demand; Amperometric detection; Boron-doped diamond; Environmental analysis; Electrochemical sensor
- Citation
- JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY, v.14, no.3, pp 215 - 221
- Pages
- 7
- Journal Title
- JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
- Volume
- 14
- Number
- 3
- Start Page
- 215
- End Page
- 221
- ISSN
- 2093-8551
2288-9221
- Abstract
- A rapid and environment-friendly electrochemical sensor to determine the chemical oxygen demand (COD) has been developed. The boron-doped diamond (BDD) thin-film electrode is employed as the anode, which fully oxidizes organic pollutants and provides a current response in proportion to the COD values of the sample solution. The BDD-based amperometric COD sensor is optimized in terms of the applied potential and the solution pH. At the optimized conditions, the COD sensor exhibits a linear range of 0 to 80 mg/L and the detection limit of 1.1 mg/L. Using a set of model organic compounds, the electrochemical COD sensor is compared with the conventional dichromate COD method. The result shows an excellent correlation between the two methods.
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