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ELIME (Enzyme Linked Immuno Magnetic Electrochemical) Method for Mycotoxin Detection
Published on: October 23, 2009
Electrochemical immunochip sensor for aflatoxin M1 detection
Charlie O Parker1, Yvonne H Lanyon, Mary Manning
1Cranfield Health, Cranfield University, Cranfield, Bedfordshire, MK43 0AL, UK.
Analytical Chemistry
|June 4, 2009
Summary
A new microelectrode array immunosensor was developed for detecting aflatoxin M1 in milk. This sensitive sensor meets legislative limits and shows potential for broader applications.
Area of Science:
- Electrochemistry
- Biosensors
- Analytical Chemistry
Background:
- Aflatoxin M1 is a significant food contaminant.
- Accurate detection of Aflatoxin M1 is crucial for food safety.
- Existing detection methods can be complex and time-consuming.
Purpose of the Study:
- To fabricate and characterize a microelectrode array (MEA) immunosensor for Aflatoxin M1.
- To develop a sensitive and rapid detection method for Aflatoxin M1 directly in milk.
- To assess the sensor's performance against legislative standards.
Main Methods:
- Fabrication of gold MEAs using photolithography.
- Electrochemical characterization including cyclic voltammetry.
- Immobilization of antibodies and development of a competitive ELISA assay.
- Surface characterization using SEM and AFM.
Main Results:
- Successful fabrication and characterization of the MEA immunosensor.
- Achieved a detection limit of 8 ng L(-1) for Aflatoxin M1 in milk.
- Demonstrated a dynamic detection range of 10-100 ng L(-1), meeting regulatory limits.
- Observed minimal interference from milk matrix components.
Conclusions:
- The developed MEA immunosensor offers a sensitive and reliable method for Aflatoxin M1 detection in milk.
- This technology has the potential for on-site, rapid analysis, reducing reliance on complex instrumentation.
- The sensor platform shows promise for detecting other analytes in complex matrices.
