Sensitive determination of typical phenols in environmental water samples by magnetic solid‐phase extraction with polyaniline@SiO₂@Fe as the adsorbents before HPLC

Abstract

A novel magnetic core-shell material polyaniline@SiO @Fe (PANI@SiO @Fe) has been successfully synthesized and investigated as an effective adsorbent for the magnetic solid-phase extraction of typical endocrine disrupting compounds such as bisphenol A, tetrabromobisphenol A, and 4-nonylphenol from water samples. The morphology of the as-prepared PANI@SiO @Fe was characterized by transmission electron microscopy and X-ray diffraction. The main parameters that influenced the enrichment performance such as the kind of eluent, amount of adsorbent, volume of eluent, adsorption time, elution time, ionic strength, pH, concentration of humic acid, and sample volume were investigated. Under the optimal conditions, a good linear relationship was found in the range of 0.05-100 μg/L for bisphenol A, 0.05-300 μg/L for tetrabromobisphenol A, and 0.05-250 μg/L for 4-nonylphenol, respectively. The correlation coefficients are all above 0.995. The limits of detection were in the range of 0.009-0.04 μg/L, and precisions were under 3.73% (n = 6). The real water analysis indicated that the spiked recoveries were in the range of 92.9-98.9% (n = 3). All these results indicated that the developed method was an efficient tool for the analysis of bisphenol A, tetrabromobisphenol A, and 4-nonylphenol.

An iron-based metal–organic framework as a novel dispersive solid-phase extraction sorbent for the efficient adsorption of tetrabromobisphenol A from environmental water samples

“…However, with the rapid development of science and technology, the wastes discharged from industry and daily life have continually increased, resulting in increasingly serious air and water quality issues, and soil pollution, and the natural ecological balance has been severely impacted and even destroyed. 1,2 Tetrabromobisphenol A (TBBPA) is widely used in the production of plastics, 3 packaging materials, 4 electronics, 5 and textiles. 6 It is also the most widely employed brominated ame-retardant (BFR).…”

Magnetic solid‐phase extraction of pyrethroid pesticides in environmental water samples with CoFe2O4‐embedded porous graphitic carbon nanocomposites

“…Among all the methods mentioned above, the technology of magnetic solid-phase extraction (MSPE) combined with HPLC [19][20][21][22][23][24] has attracted much attention because of its low price, facile preparation, good separation, reusability, and environment friendliness. CoFe 2 O 4 is a common magnetic material with many kinds of composites [25][26][27][28].…”

Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene

“…A magnetic nanosorbent is readily separated from a solution by means of a magnet and the minimum time for attainment of equilibrium is provided [16]. Magnetic nanoparticles are applied for the development of composite polymer sorbents [31][32][33] or metal-organic frameworks, a new class of hybrid inorganic-organic microporous crystalline materials [17,34,35], and magnetic covalent organic frameworks [36,37]. Magnetic polymer beads possess additional properties, which make them very attractive for being applied upon concentration.…”