Electrochemical detection of arsenic in drinking water using low-cost electrode

Deepti, _; Mondal, Partha Sarathi

doi:10.1016/j.matpr.2022.06.207

Cited by 2 publications

(3 citation statements)

References 27 publications

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“…Therefore, quantitative and qualitative detection of As 3+ is vital for assessing the toxicity of ingested arsenic within the body. While many previously reported electrochemical studies claim that oxidation/reduction peaks originate from the presence of arsenic, a comparison between As 3+ and As 5+ studies is often lacking [ 16 , 17 , 18 , 19 , 21 ]. Furthermore, some studies were conducted in the presence of nitrogen to prevent the possible oxidation of As 3+ to As 5+ in the presence of oxygen [ 17 , 30 , 31 ].…”

Section: Resultsmentioning

confidence: 99%

“…While many previously reported electrochemical studies claim that oxidation/reduction peaks originate from the presence of arsenic, a comparison between As 3+ and As 5+ studies is often lacking [ 16 , 17 , 18 , 19 , 21 ]. Furthermore, some studies were conducted in the presence of nitrogen to prevent the possible oxidation of As 3+ to As 5+ in the presence of oxygen [ 17 , 30 , 31 ]. However, nitrogen purging is not feasible for in vivo, real-time monitoring.…”

Section: Resultsmentioning

confidence: 99%

“…Anodic stripping voltammetry is commonly used in electrochemical sensors for arsenic detection, employing various electrodes such as platinum-disc [ 16 ], pencil graphite [ 17 ], silver [ 18 ], glassy carbon [ 19 ], and carbon nanotubes [ 20 ]. Additionally, differential pulse voltammetry [ 21 ] and cyclic voltammetry [ 22 ] have also been explored for arsenic detection.…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast Detection of Arsenic Using Carbon-Fiber Microelectrodes and Fast-Scan Cyclic Voltammetry

Manring,

Strini,

Koifman

et al. 2024

Micromachines

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Arsenic contamination poses a significant public health risk worldwide, with chronic exposure leading to various health issues. Detecting and monitoring arsenic exposure accurately remains challenging, necessitating the development of sensitive detection methods. In this study, we introduce a novel approach using fast-scan cyclic voltammetry (FSCV) coupled with carbon-fiber microelectrodes (CFMs) for the electrochemical detection of As3+. Through an in-depth pH study using tris buffer, we optimized the electrochemical parameters for both acidic and basic media. Our sensor demonstrated high selectivity, distinguishing the As3+ signal from those of As5+ and other potential interferents under ambient conditions. We achieved a limit of detection (LOD) of 0.5 μM (37.46 ppb) and a sensitivity of 2.292 nA/μM for bare CFMs. Microscopic data confirmed the sensor’s stability at lower, physiologically relevant concentrations. Additionally, using our previously reported double-bore CFMs, we simultaneously detected As3+-Cu2+ and As3+-Cd2+ in tris buffer, enhancing the LOD of As3+ to 0.2 μM (14.98 ppb). To our knowledge, this is the first study to use CFMs for the rapid and selective detection of As3+ via FSCV. Our sensor’s ability to distinguish As3+ from As5+ in a physiologically relevant pH environment showcases its potential for future in vivo studies.

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