AI Article Synopsis
- Researchers created a new type of polymer called a thermosensitive magnetic-molecularly-imprinted polymer (TMMIP) that can selectively extract specific pesticides from samples.
- The TMMIP uses mixed-valence iron hydroxide nanoparticles for magnetism and incorporates special chemicals to target five organophosphorus pesticides before analyzing them with gas chromatography.
- The method shows impressive accuracy and sensitivity, making it effective for detecting pesticide residues in fruits and vegetables, achieving recoveries between 93-117%.
Article Abstract
A thermosensitive magnetic-molecularly-imprinted polymer (TMMIP) was successfully prepared in an aqueous medium. The TMMIP was applied as an effective adsorbent in dispersive solid-phase microextraction for the selective enrichment of five organophosphorus pesticides (OPPs; diazinon, fenitrothion, fenthion, parathion-ethyl, and ethion) before analysis by gas chromatography. The polymerization was performed using mixed-valence iron hydroxide nanoparticles as the magnetic support, N-isopropyl acrylamide as the thermosensitive monomer, ethion as the template, and methacrylic acid as the functional monomer. The adsorption and desorption mechanisms of OPPs depend on their interactions with the adsorbents and solution temperature. Our methodology provides good linearity (0.50-2000 µgL), with a correlation determination of R > 0.9980, low limit of detection (0.25-0.50 µgL), low limit of quantitation (0.50-1.50 μg L), and high precision (%RSD < 7%). The developed method demonstrates excellent applicability for accurately and efficiently determining OPP residuals in fruit and vegetable samples with good recoveries (93-117%).
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| http://dx.doi.org/10.1016/j.foodchem.2023.137069 | DOI Listing |
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Article Synopsis
- Researchers created a new type of polymer called a thermosensitive magnetic-molecularly-imprinted polymer (TMMIP) that can selectively extract specific pesticides from samples.
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