Template-assisted polymeric spherules for the solid phase extraction of chlorfenapyr from contaminated water

ABSTRACT

This work presents a combination of three functional monomers, acrylonitrile, vinyl acetate, and acrylic acid to synthesize template assisted spherules for the selective recognition of chlorfenapyr; a halogenated pyrrole class of pro-pesticides. Chlorfenapyr imprinted polymer spherules (MIPs) were synthesized through precipitation polymerization, characterized, and applied to extract pesticide from agricultural run-off with an adsorption capacity of 8.7 mg/g. The imprinting effect was evaluated by comparing the binding ability of MIP to the structural analogues of chlorfenapyr. The maximum percentage recovery of 91%, limit of detection 3.5 × 10⁻⁵ mol/L and limit of quantification 0.1 × 10⁻⁴ mol/L were obtained.

KEYWORDS:

• Molecularly imprinted polymer
• solid-phase extraction
• chlorfenapyr
• contaminated water

Novelty Statement

The article relates the original research focusing the synthesis of molecularly imprinted sorbent through a novel combination of precursors for the selective recognition of chlorfenapyr (insecticide) from agricultural land water runoff. We report for the first time, the synthesis of imprinted sorbent for the determination of chlorfenapyr.

Additional information

Funding

This work was supported by the Bahauddin Zakariya University, Multan, Pakistan.