Solid-phase extraction using molecularly imprinted polymers for selective extraction of a mycotoxin in cereals
Wassim Hadj Ali1, Delphine Derrien, Florent Alix
1Department of Environmental and Analytical Chemistry (UMR PECSA 7195 CNRS-UPMC Paris 06-ESPCI ParisTech), ESPCI ParisTech, 10 rue Vauquelin, 75231 Paris cedex 05, France.
Journal of Chromatography. A
|May 22, 2010
Summary
A new molecularly imprinted polymer (MIP) effectively removes Ochratoxin A (OTA) from cereal extracts using solid-phase extraction (SPE). This MIP method demonstrates high selectivity and capacity, outperforming traditional immunoaffinity columns for mycotoxin clean-up.
Area of Science:
- Analytical Chemistry
- Food Safety
- Polymer Science
Background:
- Mycotoxins, such as Ochratoxin A (OTA), pose significant risks to food safety.
- Efficient methods for mycotoxin detection and removal are crucial for protecting public health.
Purpose of the Study:
- To develop and validate a novel molecularly imprinted polymer (MIP) for Ochratoxin A (OTA) clean-up from cereal extracts.
- To compare the performance of the MIP-based solid-phase extraction (SPE) with a conventional immunoaffinity column.
Main Methods:
- Development of a MIP sorbent for selective OTA retention.
- Solid-phase extraction (SPE) using MIP in both crushed monolith and micro-bead formats.
- Optimization of the extraction procedure for wheat samples.
- Validation using spiked and certified contaminated wheat samples.
- Comparative analysis with immunoaffinity chromatography.
Main Results:
- The MIP demonstrated high selectivity for OTA in both pure solvents and complex wheat extracts.
- Optimized MIP micro-beads achieved near 100% recovery rates for OTA.
- The MIP-based SPE exhibited significantly higher binding capacity compared to the immunoaffinity column.
- The developed method proved effective for cleaning up OTA from real cereal samples.
Conclusions:
- Molecularly imprinted polymers offer a highly selective and efficient alternative for Ochratoxin A (OTA) removal from food matrices.
- MIP-based SPE presents a promising, high-capacity approach for mycotoxin decontamination in food safety applications.
