Overview
Argoubi and colleagues developed an electrochemical aptasensor for ochratoxin A (OTA) using gold nanoparticles modified with a ferrocene-linked anti-OTA aptamer on disposable electrodes. Gold nanoparticles provide the electrode modification surface; they are not the analyte. OTA is a nephrotoxic mycotoxin regulated in the EU at 10 µg/kg in roasted coffee and 2 µg/L in wine. The aptasensor LOD of 0.011 ng/mL is well below these limits, demonstrating applicability for trace-level verification monitoring.
Key numbers
LOD: 11 pg/mL (0.011 ng/mL). Linear range: 0.5 to 70 ng/mL. Validated in spiked roasted coffee bean extracts and French wine. The LOD is approximately 180-fold more sensitive than prior aptasensor designs without signal amplification (Table S1).
Implications for the wiki
This paper contributes to Gold as documentation of AuNP-based sensing platforms applied to mycotoxin food safety. No food occurrence data for gold or any heavy metal are provided.
Related evidence
Update history
No substantive edit history is available in this build. The full commit record is available in git.