Electroanalytical Chemistry

Electroanalytical chemistry encompasses methods that translate chemical interactions at electrode interfaces into measurable electrical signals, enabling the sensitive and rapid quantification of analytes in diverse matrices. Central to the discipline are tailored electrode materials—carbon allotropes, metal oxides, conducting polymers and hybrid nanocomposites—which enhance surface area, electrocatalytic activity and electron-transfer kinetics. Techniques such as cyclic voltammetry, differential pulse voltammetry and square-wave voltammetry probe redox behaviour by sweeping or pulsing potential and recording resultant currents, while stripping methods pre-concentrate species to achieve ultra-low detection limits. Advances in miniaturised and disposable platforms, notably screen-printed electrodes and microfluidic devices, support point-of-care testing and in-field environmental monitoring. Integration with portable potentiostats and wireless data acquisition underpins real-time surveillance of pollutants, biomarkers and pharmaceutical residues. By uniting fundamental electrochemical principles with innovations in materials science and microfabrication, electroanalytical chemistry continues to drive applications in environmental protection, clinical diagnostics, food safety and beyond.

Research from Nature Portfolio

Recent studies have showcased hybrid electrode architectures for biosensing and environmental analysis. One investigation introduced a polymer-decorated glassy carbon electrode bearing a thin film of 1,3-benzothiazol-2-yl((4-carboxyphenyl)hydrazono)acetonitrile, enabling nanomolar detection of dopamine with clear resolution of overlapping signals and reliable performance in serum and pharmaceutical samples. Another development employed a chemically unzipped multiwalled carbon nanotube/reduced graphene oxide nanohybrid deposited on a gold-modified glassy carbon electrode to achieve picomolar sensitivity for picloram in rice water and soil. This platform exhibited rapid response times, broad linear ranges spanning sub-nanomolar to micromolar concentrations and outstanding stability under field-relevant conditions, underlining the power of metal-carbon hybrids for trace pollutant monitoring.

Research from all publishers

Disposable sensor formats have been refined for specific environmental targets. A single-run, electrogenerated-chlorine approach polymerised dicyandiamide on pre-anodised screen-printed carbon electrodes, delivering micromolar sensitivity and successful deployment in dairy and water samples. In another advance, a hierarchical holmium orthovanadate/phosphorus-doped carbon nitride nanocomposite served as a robust non-enzymatic electrocatalyst for hydrogen peroxide, achieving low-nanomolar detection and excellent selectivity in food and biological matrices. Complementing these, scheelite-type cerium vanadate nanoparticles integrated into screen-printed electrodes provided sub-nanomolar sensitivity and broad linearity for chloramphenicol, alongside exceptional reproducibility and matrix tolerance in environmental and food-safety assays.

Electroanalytical Chemistry publication trend

The graph below shows the total number of articles in electroanalytical chemistry across all publications each year (not limited to Nature Index journals).

Technical terms

Electrochemical sensor: A device that converts a chemical interaction at an electrode surface into an electrical signal proportional to analyte concentration.

Screen-printed electrode (SPE): A low-cost, disposable electrode fabricated by printing conductive inks onto substrates, enabling compact and scalable sensing platforms.

Limit of detection (LOD): The lowest concentration of an analyte that yields a signal distinguishable from background noise with a defined confidence level.

Cyclic voltammetry (CV): An electroanalytical technique in which the electrode potential is linearly swept back and forth to probe oxidation–reduction processes and reaction kinetics.

Differential pulse voltammetry (DPV): A pulsed voltammetric method that superimposes small potential increments on a linear sweep to enhance signal resolution and sensitivity.

Nanocomposite: A multi-component material combining nanoscale entities (e.g., nanoparticles, nanotubes) with a supporting matrix to synergistically improve electrocatalytic and conductive properties.

References

1. Real samples sensitive dopamine sensor based on poly 1,3-benzothiazol-2-yl((4-carboxlicphenyl)hydrazono)acetonitrile on a glassy carbon electrode. Scientific Reports (2024).
2. Chemically engineered unzipped multiwalled carbon nanotube and rGO nanohybrid for ultrasensitive picloram detection in rice water and soil samples. Scientific Reports (2023).
3. Detection of nitrification inhibitor dicyandiamide: A direct electrochemical approach. Food Chemistry X (2023).
4. Synergism of Holmium Orthovanadate/Phosphorus-Doped Carbon Nitride Nanocomposite: Nonenzymatic Electrochemical Detection of Hydrogen Peroxide. Inorganic Chemistry (2024).
5. Scheelite-Type Cerium Vanadate Nanoparticles as Functional Electrode Material for Hematotoxicity Chloromycetin Detection. ACS Applied Nano Materials (2024).