Electrochemical Sensing of Organophosphate Pesticides

Organophosphate pesticides are widely used in agriculture to control pests but pose significant risks to human health and the environment through their inhibition of cholinesterase enzymes. Electrochemical sensing has emerged as a rapid, sensitive and cost-effective approach for monitoring these compounds in water, soil and food matrices. By measuring redox signals generated at an electrode interface, electrochemical sensors convert chemical interactions into quantifiable electrical responses. Advances in nanomaterial-enhanced electrodes have substantially lowered detection limits, improved selectivity and enabled deployment in portable devices. Key strategies include enzyme-based biocatalysis, enzyme-free electrocatalysis and supramolecular recognition, often supported by carbon nanostructures, metal oxides or molecular hosts. These platforms deliver real-time analysis, facilitating regulatory compliance and safeguarding public health across global supply chains.

Research from Nature Portfolio

Recent studies have demonstrated a silver–graphene nanoribbons composite used to modify a screen-printed carbon electrode for methyl parathion detection. The hybrid electrocatalyst exploits the high conductivity and large surface area of graphene nanoribbons alongside the catalytic activity of silver nanoparticles, enabling sub-nanomolar detection limits and excellent anti-interference performance. This sensor has been successfully applied to the analysis of vegetables and fruits, illustrating its potential for on-site food safety monitoring and real-world applicability.

Electrochemical Sensing of Organophosphate Pesticides publication trend

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

Technical terms

Electrocatalysis: acceleration of electrochemical reactions at an electrode surface by a catalytic material.

Screen-printed electrode (SPE): a disposable electrode produced by printing conductive inks on a substrate for compact sensing platforms.

Detection limit: the minimum analyte concentration that can be distinguished reliably from background noise.

Differential pulse voltammetry (DPV): an electroanalytical technique applying a series of potential pulses to record current responses for trace detection.

Reduced graphene oxide (rGO): graphene oxide chemically or electrochemically reduced to restore electrical conductivity and enhance surface interactions.

References

1. Methyl parathion detection in vegetables and fruits using silver@graphene nanoribbons nanocomposite modified screen printed electrode. Scientific Reports (2017).
2. A nonenzymatic reduced graphene oxide-based nanosensor for parathion. Beilstein Journal of Nanotechnology (2022).
3. Recent Advances of Enzyme-Free Electrochemical Sensors for Flexible Electronics in the Detection of Organophosphorus Compounds: A Review. Sensors (2023).
4. Ultrasensitive electrochemical detection of methyl parathion pesticide based on cationic water-soluble pillar[5]arene and reduced graphene nanocomposite. RSC Advances (2019).