A novel superparamagnetic surface molecularly imprinted nanoparticle adopting dummy template: an efficient...

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Residual template leakage is a major limitation for molecularly imprinted polymers (MIPs) in solid-phase extraction (SPE).
• Developing selective adsorbents for bisphenol A (BPA) is crucial for environmental monitoring.

Purpose of the Study:

• To create a novel MIP adsorbent with a superparamagnetic core-shell nanoparticle support to prevent template leakage.
• To enhance the efficiency and selectivity of BPA detection using solid-phase extraction (SPE).

Main Methods:

• Preparation of magnetic dummy MIP (mag-DMIP) beads using bisphenol F (BPF) as a dummy template for BPA.
• Characterization of the mag-DMIP beads for magnetic properties and selectivity.
• Application of mag-DMIP beads as adsorbents in SPE for BPA detection in real water samples.

Main Results:

• The synthesized mag-DMIP beads exhibited excellent magnetic properties.
• The beads demonstrated high selectivity towards the target molecule, BPA.
• SPE using mag-DMIP beads achieved high recoveries (84.7%–93.8%) and a low limit of detection (2.50 pg mL⁻¹).

Conclusions:

• The developed mag-DMIP beads effectively overcome the challenge of residual template leakage in MIP-SPE.
• These novel magnetic beads are efficient and selective adsorbents for BPA detection in environmental water samples.