Magnetic solid‐phase extraction of benzoylurea insecticides by Fe₃O₄ nanoparticles decorated with a hyper‐cross‐linked porous organic polymer

Abstract

A magnetic polytriphenylamine porous organic polymer was prepared through simple self-polycondensation of triphenylamine followed by coprecipitation with Fe and Fe . It was applied as a magnetic adsorbent for the extraction of six benzoylurea insecticides from tomato, cucumber, and watermelon samples before their high-performance liquid chromatography and mass spectral detection. Under the optimized experimental conditions, the established method gave a low limit of detection ranging from 0.05 to 0.1 ng/g and a good linear response ranging from 0.2 to 40 ng/g with coefficients of determination >0.99. The method recoveries for spiked analytes at the concentrations of 3 and 15 ng/g in real samples were in the range of 87.7-106.7% with the relative standard deviations <6.4%. The results indicated that it had a good adsorption capability toward the target analytes due to the π-stacking and hydrogen bonding interactions. The polymer material showed great potential in the efficient extraction of organic compounds from real samples with complex matrixes.

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

“…These results reveal the presence of various pore sizes varying from micropores to mesopores (Wood et al, 2008;Nqombolo et al, 2019). In addition, large hysteresis loop at high relative pressure approaching 1.0, suggested the presence of microporous structures (Cao et al, 2018;Wang et al, 2018b;Hao et al, 2019;Nqombolo et al, 2019;Li et al, 2020).…”

“…It can be seen that the incorporation of Fe 3 O 4 reduced the BET surface area of nanocomposite. According to Figure 5A, P-POP gives a typical type I isotherm signifying the classical characteristic of microporous materials (Cao et al, 2018;Wang et al, 2018b;Hao et al, 2019;Li et al, 2020). As shown in Figure 5B, the N 2 adsorption-desorption isotherm for MP-POP present a distinctive type IV isotherm.…”

“…Currently, several sample extraction techniques, such as cloud point extraction (CPE) (Kachangoon et al, 2020), liquid-phase microextraction (LLME) Jovanov et al, 2013;Bolzan et al, 2015;Vichapong et al, 2015;Hou et al, 2019;Kachangoon et al, 2020) solid-phase extraction (SPE) (Xie et al, 2011;Shi et al, 2017;Zhang et al, 2017;Cao et al, 2018;Moyakao et al, 2018;Xiong et al, 2018;Hou et al, 2019) and solid-phase microextraction (SPME) (Ding et al, 2019;Queiroz et al, 2019;Xue et al, 2019), have been reported for the extraction of the neonicotinoid insecticides in various samples. Among the SPE based methods magnetic solid-phase extraction (MSPE) has gained a lot of attention due to its attractive properties such as simplicity, rapidity, robustness, high enrichment factors, and environmentally friendliness (Deng et al, 2009(Deng et al, , 2019Wang et al, 2018b;Queiroz et al, 2019). In MSPE, the magnetic sorbent play a major role on the analytical performance of the method (He et al, 2014;Fumes et al, 2015;Jiang et al, 2019;Li and Shi, 2019).…”

Nanopesticides in Agriculture: Benefits and Challenge in Agricultural Productivity, Toxicological Risks to Human Health and Environment

“…Allergic reactions, cardiac and respiratory problems, and endocrine disruption on human placental JEG3-cell line have seen in humans. The presence of albumin, surfactants, and solvents like 1,4-dioxane derivates increases nanoparticles' toxicity [31,43,[76][77][78].…”

Activated carbon/diatomite‐based magnetic nanocomposites for magnetic solid‐phase extraction of S‐phenylmercapturic acid from human urine

“…As a new solid‐phase extraction (SPE) mode, magnetic solid‐phase extraction (MSPE) has attracted much interest and attained wide application (Chauhan et al, 2015; Wu et al, 2019). In MSPE, the phase separation of the solid magnetic absorbent from a liquid sample can be easily collected by the application of an external magnetic field without additional filtration or centrifugation steps, which can dramatically simplify the pretreatment procedure (Wang et al, 2018). Moreover, MSPE has many obvious advantages including there being no need to condition the adsorbent and also column packing elimination, high contact surface enhancing efficiency and low consumption of organic solvents.…”