Preparation of a magnetic graphene/polydopamine nanocomposite for magnetic dispersive solid-phase extraction of benzoylurea insecticides in environmental water samples

Abstract

A magnetic graphene/polydopamine (MG/PDA) nanocomposite has been prepared and used as sorbent for magnetic dispersive solid-phase extraction (MDSPE) of four benzoylurea insecticides in environmental water samples. The obtained nanocomposites were characterized by transmission electron microscopy, scanning electron microscopy, vibrating sample magnetometry, powder X-ray diffraction, fourier transform infrared spectroscopy, surface area and porosity analysis and thermogravimetric analysis. To investigate the adsorption performance of MG/PDA for target analytes, various parameters affecting the MG/PDA-based MDSPE procedure were optimized. Under the optimal conditions, the established method exhibits good linearity ( R 2 ≥ 0.9988) in the concentration range 2.5–500 µg L −1 . A low limit of detection (0.75 µg L −1 , signal/noise = 3:1), a low limit of quantification (2.50 µg L −1 , signal/noise = 10:1), and good precision (intraday relative standard deviation ≤3.6%, interday relative standard deviation ≤4.5%) are also achieved. Finally, the simple, fast, and sensitive sample preparation technique was successfully used to determine benzoylurea insecticides in environmental water samples.

Dispersive Magnetic Solid-Phase Extraction as a Novelty Sample Treatment for the Determination of the Main Aflatoxins in Paprika

“…Besides, similar nanomaterials with polypyrrole in their composition have previously reported positive results for the analysis of other organic analytes such as pyrethroids, benzoylurea insecticides and sulfonamides in food and environmental samples [ 36 , 38 , 39 ].…”

Development and application of kinetic-spectrophotometric method for analysis of diflubenzuron in soil samples using SPE followed by HPLC method

“…Sample preparation plays an important role in the pesticide residues analysis. To date, a large number of methods have been developed and reported for the analysis of benzoylureas in different samples (water, juice, fruit, food, soil samples) such as dispersive liquid-liquid microextraction (Wang et al, 2017), solid-phase extraction (SPE) (Huang et al, 2011), solidphase microextraction (SPME) (Mei et al, 2015), dispersive solid-phase extraction (DSPE) (Martin Pozo et al, 2019) and magnetic dispersive solid-phase extraction (MDSPE) (Huang et al, 2019a). QuEChERS methods are considered to be a quick, easy, cheap, effective, robust, and safe sample preparation methods.…”

Magnetic Solid‐Phase Extraction of Fipronil from Aqueous Solution and Eggshells Using Amine‐Coated Iron Oxide Nanoparticles

“…[22] With the increase in food safety and health concerns, new separation or cleanup methods have been required to extract fipronil from contaminated agricultural lands, water and foods. Recently, adsorption process has attracted more attention for the removal studies of pesticides from aqueous solutions, soil, water and food matrixes [23][24][25][26][27][28] due to its simple applicability, reusability, high removal capacity and lower cost. In adsorption based separation processes, different types of adsorbents are used and the selection of the adsorbent depends on the porosity, pore structure, nature of its adsorbing surfaces, surface functional groups and most importantly applications.…”