Abstract
An impedimetric sensor for persistent toxic substances, including organic pollutants and toxic inorganic ions is presented. The persistent toxic substances are detected using an ultrasensitive technique that is based on electron‐transfer blockage. This depends on the formation of guest–host complexes, hydrogen bonding, or a cyclodextrin (CD)‐metal complex (Mm(OH)n−β‐CD) structure between the target pollutants and β‐CD.
Highlights
An impedimetric sensor for persistent toxic substances, including organic strongly dependent on the using of noble pollutants and toxic inorganic ions is presented
Mercapto-β-cyclodextrin (β-CD) monolayer was self-assembled via Au–S bond onto macro, micro, and nanogold electrodes
Cyclodextrin is characterized as a conical cylinder with a hydrophobic inner cavity and a hydrophilic exterior.[14]
Summary
An impedimetric sensor for persistent toxic substances, including organic strongly dependent on the using of noble pollutants and toxic inorganic ions is presented. We explored the impedance behaviors of mercapto-β-CD modified 2 mm, 25 μm, and 400 nm diameter gold electrodes toward PCB-77 over a concentration range (Figure 3a–c and optimized condition of preconcentration time, Supporting Information).
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