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Electropolymerized MIP with MWCNTs on Stir Bar Using Multivariate Optimization for Tetradifon Detection in Date
Fatemeh Ganjeizadeh Rohani1,2, Mehdi Ansari1
1Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
Pharmaceutical Nanotechnology
|September 25, 2019
Summary
This study developed a novel method using molecularly imprinted polymers and multi-walled carbon nanotubes for detecting tetradifon pesticide in dates. The technique offers a simple, reliable, and precise way to ensure food safety.
Area of Science:
- Analytical Chemistry
- Materials Science
- Food Safety
Background:
- Pesticide residue analysis is crucial for food safety, particularly for widely used pesticides like tetradifon in date palm cultivation.
- Molecularly imprinted polymers (MIPs) offer high selectivity, while multi-walled carbon nanotubes (MWCNTs) provide a large surface area, making their combination advantageous for extraction.
Purpose of the Study:
- To develop a simple, reliable, and precise method for determining tetradifon pesticide residue in date samples.
- To optimize the synthesis of a molecularly imprinted polymer-MWCNT composite using experimental design for enhanced extraction efficiency.
- To validate the developed method for its application in routine food quality control.
Main Methods:
- Electrochemical synthesis of a molecularly imprinted polymer-MWCNT composite on a steel rod using cyclic voltammetry.
- Optimization of composite synthesis and extraction conditions using experimental design.
- Determination of tetradifon residue using ultra-high performance liquid chromatography (UHPLC).
Main Results:
- A repeatable MIP-MWCNT composite film with good adhesion and persistence was successfully synthesized.
- The method achieved a detection limit (LOD) of 16 ng/ml and a quantification limit (LOQ) of 49 ng/ml.
- High average recovery rates (86.5%–90.7%) with low relative standard deviation (0.79%–1.04%) were observed.
Conclusions:
- The developed method is cost-effective, selective, reproducible, and accurate for tetradifon residue determination.
- The method was successfully applied to analyze tetradifon in real date samples from a local market.
- This approach contributes to robust food safety protocols for pesticide monitoring.
