Preparation of ionic liquid modified magnetic metal-organic frameworks composites for the solid-phase extraction of α–chymotrypsin

Wei, Xiaoxiao; Wang, Yuzhi; Chen, Jing; Xu, Panli; Zhou, Yigang

doi:10.1016/j.talanta.2018.02.022

Cited by 51 publications

(32 citation statements)

References 37 publications

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“…ILs can be used as a modifier on a support material to introduce different interactions between an adsorbent and a target analyte, which include ion-exchange, hydrophobic, electrostatic, hydrogen bonding, and π–π interactions [32]. To date, some IL-modified ZIFs have been prepared for sample pretreatment [33]. However, no ILs have been reported as modifying agents of magnetic MWCNT/ZIF-8 or used as an adsorbent of MSPE for DDTs.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Solid-Phase Extraction of Dichlorodiphenyltrichloroethane and Its Metabolites from Environmental Water Samples Using Ionic Liquid Modified Magnetic Multiwalled Carbon Nanotube/Zeolitic Imidazolate Framework-8 as Sorbent

Huang

Liu

et al. 2019

Molecules

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As persistent organic pollutants, dichlorodiphenyltrichloroethanes (DDTs) and their metabolites pose considerable risks to human health and the environment. Therefore, monitoring DDTs in the environment is essential. Here, we developed a green, simple, and effective magnetic solid-phase extraction (MSPE) method coupled with gas chromatography tandem triple-quadrupole mass spectrometry to determine the DDT content of environmental water samples. A magnetic ionic liquid (IL) adsorbent was developed based on a modified magnetic multiwalled carbon nanotube/zeolitic imidazolate framework-8 (MM/ZIF-8/IL), synthesized by immobilizing the IL on the surface of MM/ZIF-8. We confirmed successful synthesis of MM/ZIF-8/IL by material characterization, and our results suggested that the MM/ZIF-8/IL had a high Brunauer–Emmett–Teller surface area (159.9 m2 g−1), good thermostability (<800 °C), and a high degree of superparamagnetism (52.9 emu g−1). Several experimental conditions affecting the MSPE efficiency were optimized. Under the best conditions, good detection linearity was achieved (0.5–500 µg L−1) with determination coefficients ranging from 0.9927 to 0.9971. The lower limits of detection (0.0016–0.0072 µg L−1) also had good precision, having an intraday relative standard deviation (RSD) ≤ 6.5% and an interday RSD ≤ 8.9%. Finally, we used the as-developed method to determine DDT levels in environmental water samples.

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Section: Introductionmentioning

confidence: 99%

Magnetic Solid-Phase Extraction of Dichlorodiphenyltrichloroethane and Its Metabolites from Environmental Water Samples Using Ionic Liquid Modified Magnetic Multiwalled Carbon Nanotube/Zeolitic Imidazolate Framework-8 as Sorbent

Huang

Liu

et al. 2019

Molecules

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“…33,34 Some IL-modied ZIFs have been reported in recent years, and these ZIFs are attractive in many research elds, especially for sample pretreatment. 35 To the best of our knowledge, no ZIF-8/IL-based composite adsorbent has been reported for the analysis of pyrethroids in a tea infusion.…”

Section: Introductionmentioning

confidence: 99%

Magnetic solid-phase extraction of pyrethroid insecticides from tea infusions using ionic liquid-modified magnetic zeolitic imidazolate framework-8 as an adsorbent

Huang

Liu

et al. 2019

RSC Adv.

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“…Ionic liquids (ILs) are a kind of classic organic salts . Due to their unique characteristics, such as good stability, great ionic conductivity and distinguished thermal, ILs have been diffusely applied in many areas including chemistry industry, catalysis, and biological sensor .…”

Section: Introductionmentioning

confidence: 99%

“…In particular, ILs have been successfully used for sample pretreatment, including liquid‐liquid extraction, solid phase microextraction . ILs can be modified onto the surface of the magnetic sphere by chemical bonding, so ILs adsorbed in magnetic sphere's surface and the analysis of parabens based on MSPE have become a rising star …”

Section: Introductionmentioning

confidence: 99%

Self‐Assembling Bifunctional Hydrophilic Magnetic Nanomaterials for Highly Efficient Enrichment of Parabens in Beverages Sample

2019

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Preservatives affect human endocrine systems and pose a potential threat to the environment, so developing a fast, lowcost means to detect parabens is critical. In this work, a hydrophilic magnetic ball (Fe 3 O 4 @mSiO 2 @PDA-IL@C18) is prepared via functionalized position control strategy. The imidazole-based ionic liquid and mesoporous silica are outer bifunctional groups, which provide active sites for the extraction of preservatives by the π-π interaction.Fe 3 O 4 @mSiO 2 @PDA-IL@C18 was utilized to the selective enrichment of parabens with good linear range (0.05-300 ng/mL), excellent recovery (94%-105%) and precision (RSDs lower than 5.2%), and low detection limit (0.05 ng/mL). In the actual sample test, the prepared Fe 3 O 4 @mSiO 2 @PDA-IL@C18 could specifically detect parabens from green tea and cola samples.The results displayed that we provided an efficient and simple method for the detection of preservatives in food.

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Preparation of ionic liquid modified magnetic metal-organic frameworks composites for the solid-phase extraction of α–chymotrypsin

Cited by 51 publications

References 37 publications

Magnetic Solid-Phase Extraction of Dichlorodiphenyltrichloroethane and Its Metabolites from Environmental Water Samples Using Ionic Liquid Modified Magnetic Multiwalled Carbon Nanotube/Zeolitic Imidazolate Framework-8 as Sorbent

Magnetic Solid-Phase Extraction of Dichlorodiphenyltrichloroethane and Its Metabolites from Environmental Water Samples Using Ionic Liquid Modified Magnetic Multiwalled Carbon Nanotube/Zeolitic Imidazolate Framework-8 as Sorbent

Magnetic solid-phase extraction of pyrethroid insecticides from tea infusions using ionic liquid-modified magnetic zeolitic imidazolate framework-8 as an adsorbent

Self‐Assembling Bifunctional Hydrophilic Magnetic Nanomaterials for Highly Efficient Enrichment of Parabens in Beverages Sample

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