Identification of 3-chloro-1,2-propandiol using molecularly imprinted composite solid-phase extraction materials

Area of Science:

• Materials Science
• Analytical Chemistry
• Polymer Chemistry

Background:

• 3-chloro-1,2-propandiol (3-MCPD) is a food contaminant requiring sensitive detection methods.
• Molecularly imprinted polymers (MIPs) offer selective molecular recognition capabilities.

Purpose of the Study:

• To synthesize and characterize a novel MIP for selective 3-MCPD adsorption.
• To evaluate the MIP's performance in solid-phase extraction (SPE) for 3-MCPD determination in complex matrices.

Main Methods:

• Surface polymerization using 3-MCPD as a template on silica microparticles.
• Characterization via infrared spectroscopy and scanning electron microscopy.
• Adsorption studies using gas chromatography with electron capture detection (GC-ECD) and Scatchard analysis.

Main Results:

• The synthesized MIP exhibited a maximum apparent binding capacity of 67.64 μmol/g for 3-MCPD.
• The MIP-SPE method achieved high recoveries (>92.7%) with low relative standard deviation (<1.83%) in soy sauce.
• Selective enrichment and determination of 3-MCPD were successfully demonstrated.

Conclusions:

• The novel MIP material is effective for selective 3-MCPD adsorption and SPE.
• The MIP-SPE-GC protocol provides a robust method for 3-MCPD quantification in food samples.
• This approach minimizes template leakage and enhances analytical selectivity.