Advanced electrochemical detection of arsenic using platinum-modified boron-doped diamond by anodic stripping voltammetry
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2024-06-30 |
| Journal | Environmental and Materials |
| Authors | Fadhlir R.A.A. Fatah, Rinaldo Sitorus, Asep Saefumillah, Hanif Mubarok, Respati K. Pramadewandaru |
Abstract
Section titled āAbstractāBackground: Platinum-modified boron-doped diamond (BDD) electrodes were effectively fabricated through a combination of wet seeding and electrodeposition techniques. Methods: This research involved the utilization of various chemicals and apparatus, the modification of boron-doped diamond (BDD) electrodes with platinum using wet seeding and electrodeposition, and the detection of As3+ and As5+ using a phosphate buffer solution and anodic stripping voltammetry (ASV). Findings: Characterization using Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) confirmed the successful deposition of 1.54% platinum on the BDD surface. These modified electrodes were employed as sensors for arsenic species (AsĀ³āŗ and Asāµāŗ) using anodic stripping voltammetry (ASV) in a 0.1 M phosphate buffer solution at pH 6. Under optimal conditions, including a deposition potential of -500 mV, a deposition time of 150 s, and a scan rate of 200 mV/s, the linear detection of AsĀ³āŗ and Asāµāŗ was achieved within a concentration range of 0 to 100 ppb (RĀ² = 0.9797 and 0.9903, respectively). Prior to ASV detection of Asāµāŗ, a pretreatment step involving the addition of 0.1 M NaBHā was necessary to reduce Asāµāŗ to AsĀ³āŗ. The detection limits for AsĀ³āŗ and Asāµāŗ were determined to be 16.50 ppb and 8.19 ppb, respectively. Conclusion: This research highlights the potential of BDD/Pt electrodes in environmental monitoring and arsenic detection applications and demonstrates the methodās efficacy for the speciation analysis of arsenic species. Novelty/Originality of this Study: This research pioneers the use of platinum-modified boron-doped diamond electrodes for the speciation analysis of arsenic, offering a promising new approach for environmental monitoring applications.