Electrochemical Detection of Bismuth Ions in Environmental Samples
Summary
The monitoring of bismuth ions in water, soil and wastewater is critical owing to the metal’s increasing industrial use and potential ecotoxicological impacts. Electrochemical detection—particularly voltammetric techniques—offers high sensitivity, low cost and field-deployable platforms for trace analysis. Central to these approaches is the preconcentration of Bi³⁺ at a working electrode surface followed by oxidative or reductive stripping, enabling detection limits down to the nanomolar level. Advances in electrode engineering have leveraged bismuth-film and carbon-based materials, metal nanoparticles and conducting polymers to enhance active surface area, electrocatalytic activity and resistance to interferences. Miniaturised configurations such as screen-printed electrodes and integrated microfluidic cells facilitate rapid, on-site measurements. Key challenges remain in achieving robust selectivity against coexisting heavy metals, maintaining signal stability in complex matrices and simplifying sample preparation. Recent efforts have focused on sustainable nanomaterial synthesis, functional ligand grafting and hybrid electrochemical–optical sensor architectures. Together, these developments underpin a global drive towards reliable, real-time assessment of bismuth contamination to safeguard environmental and human health.
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Electrochemical Detection of Bismuth Ions in Environmental Samples publication trend
The graph below shows the total number of articles in electrochemical detection of bismuth ions in environmental samples across all publications each year (not limited to Nature Index journals).
Technical terms
Electrochemical sensor: A device that converts the concentration of an ionic species into an electrical signal via redox reactions at an electrode interface.
Anodic stripping voltammetry: A two-step technique in which metal ions are first preconcentrated by reduction onto an electrode, then oxidatively stripped to generate a current proportional to concentration.
Limit of detection (LOD): The lowest concentration of analyte that can be distinguished from background noise with a stated level of confidence.
Nanomaterial: A material featuring structural dimensions in the nanometre range, used to increase electrode surface area and improve electron-transfer kinetics.
Selectivity: The capacity of a sensor to discriminate the target ion from other species present in a complex sample matrix.
References
- Selective, Simple and Economical Method for the Voltammetric Determination of Bi(III) in the presence Cystine in Non – Complexing Solution. E3S Web of Conferences (2013).
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