Development of surface imprinted core-shell nanoparticles and their application in a solid-phase dispersion...

Area of Science:

• Materials Science
• Analytical Chemistry
• Polymer Chemistry

Background:

• Molecular imprinting techniques create polymers with specific binding sites.
• Developing selective sorbents for pesticide residue analysis is crucial for food safety.

Purpose of the Study:

• To synthesize hybrid organic-inorganic surface imprinted silica nanoparticles for methyl parathion recognition.
• To evaluate the performance of these nanoparticles as solid-phase dispersion extraction sorbents.

Main Methods:

• Surface imprinting polymerization on amino-modified silica nanoparticles using acrylamide and a grafting agent.
• Utilizing methyl parathion as the template molecule.
• Characterization of the resulting MIPs-SiO2 nanoparticles with core-shell architectures.

Main Results:

• The synthesized MIPs-SiO2 nanoparticles exhibited high affinity and surface-exposed binding sites for methyl parathion.
• The materials demonstrated excellent selectivity in recognizing the template.
• Effective extraction of trace methyl parathion from pear and green vegetable samples with high recoveries (84.7-94.4%) was achieved.

Conclusions:

• The developed MIPs-SiO2 nanoparticles are promising for selective solid-phase extraction of methyl parathion.
• This method offers efficient matrix interference elimination in food sample analysis.
• The hybrid organic-inorganic nanoparticles provide a robust platform for pesticide detection.