Electrochemical Detection of Purine Metabolites

Purine metabolites such as hypoxanthine, xanthine and uric acid play central roles in cellular energy cycles and are recognised biomarkers for conditions ranging from gout and renal dysfunction to food spoilage. Electrochemical detection techniques exploit the redox activity of these compounds to provide rapid, sensitive and often portable analytical platforms. Enzymatic approaches commonly employ oxidases immobilised on electrode surfaces to catalyse the conversion of a target purine into an electroactive product, with amperometric or voltammetric measurement of the resulting current. Non-enzymatic methods harness nanostructured materials—metal nanoparticles, doped carbon matrices or metal–oxide composites—to facilitate direct electron transfer and improve analytical figures of merit. Key advantages include low sample volumes, minimal preparation and compatibility with miniaturised or wearable devices. Advances in electrode modification strategies, transducer architectures and signal processing have substantially lowered limits of detection to the nanomolar range, broadened dynamic ranges and enhanced selectivity in complex matrices. Such developments are driving applications in point-of-care diagnostics, environmental monitoring and real-time food-quality assessment, underscoring the global significance of electrochemical purine analysis.

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Electrochemical Detection of Purine Metabolites publication trend

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

Technical terms

Purine metabolites: Small molecules derived from the degradation of purine nucleotides, including hypoxanthine, xanthine and uric acid, used as biomarkers in biological and food matrices.

Amperometry: Electrochemical technique measuring current at a constant electrode potential to quantify analyte concentration through redox processes.

Voltammetry: Method in which electrode potential is swept and resulting current is recorded, allowing discrimination among multiple electroactive species.

Glassy carbon electrode (GCE): Inert carbon substrate with high conductivity and chemical stability, widely employed in sensor fabrication.

Differential pulse voltammetry (DPV): Sensitive pulsed potential technique that enhances resolution and lowers detection limits by subtracting background currents.

Molecularly imprinted polymer (MIP): Synthetic polymer engineered with template-shaped cavities for selective binding of a target molecule, improving sensor selectivity.

References

1. Non-enzymatic electrochemical sensor based on ZnO nanoparticles/porous graphene for the detection of hypoxanthine in pork meat. AIP Advances (2024).
2. Simultaneous Electrochemical Analysis of Uric Acid and Xanthine in Human Saliva and Serum Samples Using a 3D Reduced Graphene Oxide Nanocomposite-Modified Electrode. Chemosensors (2023).
3. Molecularly Imprinted Polymer-Based Electrochemical Sensor for Rapid and Selective Detection of Hypoxanthine. Biosensors (2022).