Core–satellite surface imprinting polymer-based pipette tip solid-phase extraction for the colorimetric determination of pyrethroid metabolite
| Autor: | Ran Yuan, Jinsong Yu, Long Bai, Liu An, Hui Cao, Hongen Yuan, Fei Xu, Min Yuan, Xiaozhe Xu, Tai Ye |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
02 engineering and technology 010501 environmental sciences Benzoates 01 natural sciences Analytical Chemistry Molecular Imprinting chemistry.chemical_compound Adsorption Molecularly Imprinted Polymers Potassium Permanganate Solid phase extraction 0105 earth and related environmental sciences Detection limit chemistry.chemical_classification Elution Drinking Water Solid Phase Extraction Pipette Molecularly imprinted polymer Polymer 021001 nanoscience & nanotechnology Silane chemistry Chemical engineering Benzaldehydes Colorimetry 0210 nano-technology Water Pollutants Chemical |
| Zdroj: | Microchimica Acta. 187 |
| ISSN: | 1436-5073 0026-3672 |
| Popis: | A core–satellite-structured surface molecularly imprinted polymer has been synthesized for the enrichment of 3-phenoxybenzaldehyde by pipette tip solid-phase extraction (SPE). In a typical sol–gel process, two silane reagents as functional monomers and 3-phenoxybenzoic acid as the dummy template, the surface imprinting layer was coated on the core–satellite silica microsphere, which formed the core–satellite-structured molecularly imprinted polymer (CSMIP). Compared to the silica-based core–shell ones, this CS-MIP exhibits a stunning surface area (142 m2 g−1) in micrometer size and also overcomes the aggregation trends of core–shell structure in nanoscale. Taking potassium permanganate solution as oxidizer and indicator, the adsorbed 3-phenoxybenzaldehyde can be a quantitatively determined through redox reaction after elution. The value of maximum adsorption capacity and imprinting factor of CS-MIP were calculated to be 87.5 μg mg−1 and 2.13, respectively. These CS-MIPs were packed into commercial pipette tip as the sorbent to concentrate 3-phenoxybenzaldehyde. Under the optimum condition, a liner relationship was achieved in the range 0.200 to 1.00 μg mL−1 and the limit of detection was 81 ng mL−1. Moreover, this customized SPE device exhibits good adsorption capability after six sequential adsorption–desorption cycles, and the high recovery range of 92.2~99.7% of spiked tap water assay demonstrated its potential application for real sample analysis. |
| Databáze: | OpenAIRE |
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