Magnetic solid‐phase extraction based on a polydopamine‐coated Fe₃O₄ nanoparticles absorbent for the determination of bisphenol A, tetrabromobisphenol A, 2,4,6‐tribromophenol, and (S)‐1,1’‐bi‐2‐naphthol in environmental waters by HPLC

Abstract

Polydopamine-coated Fe3 O4 magnetic nanoparticles synthesized through a facile solvothermal reaction and the self-polymerization of dopamine have been employed as a magnetic solid-phase extraction sorbent to enrich four phenolic compounds, bisphenol A, tetrabromobisphenol A, (S)-1,1'-bi-2-naphthol and 2,4,6-tribromophenol, from environmental waters followed by high-performance liquid chromatographic detection. Various parameters of the extraction were optimized, including the pH of the sample matrix, the amount of polydopamine-coated Fe3 O4 sorbent, the adsorption time, the enrichment factor of analytes, the elution solvent, and the reusability of the nanoparticles sorbent. The recoveries of these phenols in spiked water samples were 62.0-112.0% with relative standard deviations of 0.8-7.7%, indicating the good reliability of the magnetic solid-phase extraction with high-performance liquid chromatography method. In addition, the extraction characteristics of the magnetic polydopamine-coated Fe3 O4 nanoparticles were elucidated comprehensively. It is found that there are hydrophobic, π-π stacking and hydrogen bonding interactions between phenols and more dispersible polydopamine-coated Fe3 O4 in water, among which hydrophobic interaction dominates the magnetic solid-phase extraction performance.

A miniaturized solid‐phase extraction adsorbent of calix[4]arene‐functionalized graphene oxide/polydopamine‐coated cellulose acetate for the analysis of aflatoxins in corn

“…To fabricate the miniaturized calix [4]arene-GO/PDA-CFs adsorbent, the CFs were cut into small lengths (0.20 cm). Subsequently, the PDA was coated on the surface of CFs via self-polymerization [28]. Briefly, dopamine hydrochloride (180 mg) was dissolved in 100 mL of 0.010 M tris buffer (pH 8.5), and the CFs were added to the solution and stirred at 500 rpm for 4 h at 27 ± 1 • C. Meanwhile, the calix [4]arene-GO was synthesized by adapting previous methods [29].…”

Covalent triazine‐based frameworks/iron oxide for highly sensitive magnetic solid‐phase extraction of phenolic pollutants in water samples

“…As a consequence, studies on MSPE have devoted efforts to design and screen magnetic adsorbent materials with high extraction performance towards target pollutants. Furthermore, many functional materials, such as Fe 3 O 4 /cobalt(II)‐based metal‐organic nanotubes (Fe 3 O 4 /Co‐MONT), Cd(II)‐ion imprinted magnetic mesoporous silica material, octadecyl‐functionalized monodispersed magnetic ferrite microspheres, Fe 3 O 4 /3‐(trimethoxysilyl)propyl methacrylate/ionic liquid nanoparticles, zeolitic imida zolate framework‐8 (ZIF‐8), Fe 3 O 4 /metal‐organic framework (Fe 3 O 4 /MOF), Fe 3 O 4 /SiO 2 /UiO‐66 microspheres, and polydopamine‐coated magnetic Fe 3 O 4 composites (Fe 3 O 4 @PDA) , have been successfully used in the MSPE of various environmental pollutants.…”

“…As a consequence, studies on MSPE have devoted efforts to design and screen magnetic adsorbent materials with high extraction performance towards target pollutants. Furthermore, many functional materials, such as Fe 3 [5,[9][10][11][12][13][14][15], have been successfully used in the MSPE of various environmental pollutants.…”

Aminosilanized magnetic carbon microspheres for the magnetic solid‐phase extraction of bisphenol A, bisphenol AF, and tetrabromobisphenol A from environmental water samples

“…Magnetic adsorbents play an important role in the MSPE of various analytes, causing many researchers to focus on exploring novel MSPE adsorbents . Multiple magnetic materials have been used to extract trace bisphenols from environmental water samples, such as Fe 3 O 4 /graphene quantum dots (Fe 3 O 4 /GQDs) magnetic nanocomposite , iron‐ferric oxide/graphene oxide composite (Fe@Fe 2 O 3 /GO) , polydopamine‐coated magnetic Fe 3 O 4 composites (Fe 3 O 4 @PDA) , and ionic liquid (IL) coated magnetic Fe 3 O 4 nanoparticles (NPs) . However, the most magnetic sorbents are based on iron oxides that are vulnerable under acidic conditions.…”