ArticleAnalytical and bioanalytical chemistry2026
A rapid and sensitive label-free sensor for metoprolol detection based on MIPs-modified carbon nanocomposite.
Article in Analytical and bioanalytical chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Electrochemical sensors utilizing molecularly imprinted polymers (MIPs) for metoprolol (MTP) often rely on its direct oxidation, which suffers from limited sensitivity due to the low electroactivity of MTP. Herein, a label-free electrochemical sensing platform was developed by electropolymerizing o-phenylenediamine (o-PD) on the carbon nano-onion (CNOs)-modified glassy carbon electrode (GCE). This MIPs/CNOs nanocomposite synergistically enhances the electron transfer rate and creates specific recognition sites. Consequently, the occupation of these sites by MTP hinders the diffusion of the redox probe, enabling sensitive quantification via a signal-off mechanism. Under optimized conditions, the sensor exhibits a wide linear range from 4.0 × 10
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