A molecularly imprinted polymer based monolith pipette tip for solid-phase extraction of 2,4-dichlorophenoxyacetic acid in an aqueous sample

• DOI: 10.1039/d0ay01587c
• Publication Date: 2020-09-04T09:31:52Z
• Authors: Beibei Wu; Turghun Muhammad; Sailemayi Aihebaier; Kal Karim; Yiting Hu; Sergey Piletsky
• Keywords: Monolith; Pipette; Molecularly imprinted polymer; 2,4-Dichlorophenoxyacetic acid; Solid phase extraction; Molecular imprinting; Sample Preparation

This paper presents a simple approach for fabrication of pipette tip solid-phase extraction (PT-SPE) device, which possesses monolith structure with low back pressure and has high selectivity to 2,4-dichlorophenoxyacetic acid (2,4-D). Pipette tips were packed molecularly imprinted polymers (MIPs) as selective adsorbent high-density polyethylene (HDPE) co-sintering agent, then heated form device. The key factors including the particle size amount packing material, type volume elution solvent, influence PT-SPE device performance optimized. A material 40 mg/0.20 mL in ratio 4/6 (MIPs/HDPE) treatment temperature 150 °C was selected. By determination high-performance liquid chromatography (HPLC-SPD), found have good recovery 2,4-D lake water sample at concentration (0.006 mg L-1) an enrichment factor about 50. proposed method provided reduced wall effect, are very important improving efficiency. And will promising application variety analytes complex samples.