Determination of phthalate esters in environmental water by magnetic Zeolitic Imidazolate Framework-8 solid-phase extraction coupled with high-performance liquid chromatography

A novel magnetic plasticizer molecularly imprinted polymer adsorbing material (MIP@mSiO -β-CD@Fe O ) was successfully synthesized for the determination of six phthalic acid esters in water, milk, and wine samples. The molecularly imprinted polymers were prepared via precipitation polymerization and a surface molecular imprinting technique, using a cyclodextrin-modified magnetic meso-porous material (mSiO -β-CD@Fe O ) as a magnetic supporter, dibutyl phthalate and butyl benzyl phthalate as the dual template molecules, methacrylic acid as the functional monomer, and ethyleneglycol dimethacrylate as the cross-linking agent. The polymers were characterized by scanning electron microscopy, IR spectroscopy, and X-ray powder diffraction. Thermogravimetric analysis and static and dynamic adsorption experiments were carried out to assay its stability and selectivity. Under optimal experimental conditions, a magnetic solid-phase extraction with MIP@mSiO -β-CD@Fe O coupled to gas chromatography and mass spectrometry method was successfully developed for the determination of phthalic acid esters. The established method achieved a good linear range of 0.10∼8.00 μg/mL (R > 0.99) and a low detection limit within the range of 1.0∼5.0 μg/L. An average recovery rate of 80.2∼103% with relative standard deviation < 6.7% was obtained upon the application of the developed method to detect phthalic acid esters in actual aqueous samples.

Section: Sample Pretreatmentmentioning

confidence: 99%

Preparation and application of a magnetic plasticizer as a molecularly imprinted polymer adsorbing material for the determination of phthalic acid esters in aqueous samples

Wei

Liu

Huang

et al. 2018

“…Liu et al. later employed MAA‐Fe 3 O 4 to construct Fe 3 O 4 @ZIF‐8 and applied it in MSPE to extract several phthalate esters in water samples. Coupled with HPLC analysis, low LODs (0.08–0.24 μg/L) and wide linear range (1.0–100.0 μg/L) were obtained during this assay.…”

Section: Applications Of Metal–organic Framework In Pretreatment Tecmentioning

confidence: 99%

“…Owing to high specific surface area, large pore volume, and superparamagnetism, ZIF-67-C demonstrated excellent adsorption capability with good recoveries to target compounds ( [78] in determination of chlorophenols with satisfactory linearity range (0.5-100.0 ng/mL for water samples; [73], PAHs [74], phosphopeptides [75], and endogenous peptides [71]. Liu et al [76] later employed MAA-Fe 3 O 4 to construct Fe 3 O 4 @ZIF-8 and applied it in MSPE to extract several phthalate esters in water samples. Coupled with HPLC analysis, low LODs (0.08-0.24 μg/L) and wide linear range (1.0-100.0 μg/L) were obtained during this assay.…”

Section: Magnetic Solid-phase Extractionmentioning

confidence: 99%

Recent applications of metal–organic frameworks in sample pretreatment

Wang

Rui

2017

Metal-organic frameworks are promising materials in diverse analytical applications especially in sample pretreatment by virtue of their diverse structure topology, tunable pore size, permanent nanoscale porosity, high surface area, and good thermostability. According to hydrostability, metal-organic frameworks are divided into moisture-sensitive and water-stable types. In the actual applications, both kinds of metal-organic frameworks are usually engineered into hybrid composites containing magnetite, silicon dioxide, graphene, or directly carbonized to metal-organic frameworks derived carbon. These metal-organic frameworks based materials show good extraction performance to environmental pollutants. This review provides a critical overview of the applications of metal-organic frameworks and their composites in sample pretreatment modes, that is, solid-phase extraction, magnetic solidphase extraction, micro-solid-phase extraction, solid-phase microextraction, and stir bar solid extraction.

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Ren

Wang

et al. 2018

This study demonstrates for the first time the enrichment potential of covalent triazine-based frameworks/iron oxide for the magnetic solid-phase extraction of seven typical polar phenolic pollutants. Important parameters, such as the eluant and its volume, adsorbent amounts, sample pH, extraction time, and ionic strength, were optimized in detail. Under the optimal conditions, low limits of detection (0.09-0.53 ng/mL), wide linear range (25-2000 ng/mL), good repeatability (1.2-8.3%) and reproducibility (1.5-9.9%) were achieved. The developed method was successfully applied to analyze the target phenols at trace levels in environmental water samples.