Electrochemical Biosensing for Lactate Detection

Electrochemical biosensing of lactate has emerged as a pivotal technology for monitoring metabolic status across clinical, athletic and industrial settings. By transducing the enzymatic oxidation of lactate into an electrical signal, these sensors deliver rapid, sensitive and quantitative measurements of lactic acid concentration in biological fluids such as blood, interstitial fluid and sweat. Central to the approach is the immobilisation of a biorecognition element—most commonly lactate oxidase—onto electrode substrates that range from rigid planar configurations to flexible, miniaturised platforms. Advances in electrode architecture, including incorporation of nanomaterials (for example graphene‐based frameworks, metal oxide nanorods or gold nanoparticles), have significantly enhanced surface area, electron transfer kinetics and operational stability. Furthermore, the shift towards wearable and minimally invasive formats, notably microneedle and patch devices, has enabled continuous monitoring in ambulatory subjects. Complementary non‐enzymatic strategies exploiting electrocatalytic properties of metallic and carbonaceous nanocomposites are also gaining traction, offering reagent‐free operation and extended lifetimes. Collectively, these developments underscore the global importance of lactate biosensors for real‐time metabolic assessment in critical care, personalised sports science and bioprocess control, bridging fundamental electrochemistry with practical applications.

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Electrochemical Biosensing for Lactate Detection publication trend

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

Technical terms

Lactate oxidase: An enzyme that catalyses the oxidation of lactate to pyruvate, generating electrons for electrochemical detection.

Direct electron transfer: The process by which electrons move directly between an enzyme’s active site and the electrode surface without intermediate redox mediators.

Microneedle electrode: A microfabricated array of needle-like structures designed to penetrate the skin’s outer layer for minimally invasive sampling of interstitial fluid.

Graphene oxide nanosheet: A single-layered, oxidised form of graphene that offers high surface area and functional groups for enzyme immobilisation and electron transfer.

Amperometry: An electrochemical technique in which current is measured at a fixed applied potential, providing quantitative information proportional to analyte concentration.

References

1. Continuous Measurement of Lactate Concentration in Human Subjects through Direct Electron Transfer from Enzymes to Microneedle Electrodes. ACS Sensors (2023).
2. Application of graphene oxide nanosheet lactate biosensors in continuous assessment of athlete fitness. Alexandria Engineering Journal (2024).
3. Amperometric L-Lactate Biosensor Based upon a Gold Nanoparticles/Reduced Graphene Oxide/Polyallylamine Hydrochloride Modified Screen-Printed Graphite Electrode. Chemosensors (2021).