A Choline Chloride-Ethylene Glycol Deep Eutectic Solvent Based on Magnetic Polydopamine with Preconcentration and Determination for Sulfonylurea Herbicides in Water Samples

Abstract

In this study, a novel deep eutectic solvent (DES) containing choline chloride and ethylene glycol was synthesized, and the magnetic polydopamine (PDA) was modified with this deep eutectic solvent to form Fe 3 O 4 @PDA-DES. Fourier transformed infrared spectroscopy, scanning electron microscopy, and vibrating sample magnetometer were used to characterize the proposed adsorbent. Then, this magnetic material was used as an adsorbent in the magnetic solid phase extraction process for the extraction of four sulfonylurea herbicides in water samples. The main parameters relevant to this method were investigated. Under the optimum conditions, the linearity was obtained by five points in the concentration range of 1.0-200 μg L −1 and with the correlation coefficients (r) ≥ 0.9927. The enrichment factors were in a range of 495 to 615 and the relative standard deviations were less than 4.3%. The limits of detection varied from 0.0092 to 0.0113 μg L −1. The recoveries of environmental water samples were 61.9 to 100.1%, and the recoveries of drinking water samples were 71.1-101.9%. All results highlighted the excellent potential of magnetic solid phase extraction coupled with ultra-high performance liquid chromatography strategy in selective separation and extraction of sulfonylurea herbicides in water samples.

Amino functionalized magnetic covalent organic framework for magnetic solid‐phase extraction of sulfonylurea herbicides in environmental samples from tobacco land

“…Magnetic materials are the key that affects the performance of MSPE. At present, many kinds of magnetic materials are used as adsorbents for the extraction of SUHs, such as magnetic carbon materials [8], magnetic ionic liquids [25][26][27], magnetic molecularly imprinted polymers [18], and magnetic metal-organic framework composites [28]. These magnetic materials are mainly based on π-π interaction, hydrogen bonding, and electrostatic interaction to adsorb SUHs.…”

One-Pot Strategy as a Green and Rapid Method to Fabricate Magnetic Molecularly Imprinted Nanoparticles for Selective Capture of Sulfonylurea Herbicides

“…To further demonstrate the features of the current approach in the analysis of SUHs, a comparison with reported sorbent-based methods was conducted and the comparison results are summarized in Table S9. It can be seen that the sensitivity obtained in the current method is superior to other methods. − At the same time, our method exhibits fast extraction procedure and less consumption of organic solvent. Furthermore, the suggested method shares the same level of spiking recoveries with reported approaches. − The comparison well demonstrates that the introduced method possesses some features such as high sensitivity, quickness, low cost, and eco-friendliness in the analysis of trace SUHs in complex samples.…”

Effectiveness of deep eutectic solvents for light oil recovery through spontaneous imbibition

“…They were added according to their molar ratios and required volume into a conical flask and completely sealed, before being transferred to an incubator shaker. The measured quantities were heated at 80 o C and stirred at 300 rpm for 4 hours, or until a clear homogenous liquid was obtained [7,8]. Upon forming the DES, the solutions were stored in Schott Duran bottles and left overnight to observe for any precipitation.…”