Lipase immobilization on ionic liquid-modified magnetic nanoparticles: Ionic liquids controlled esters hydrolysis at oil-water interface

AIChE Journal ◽  
2011 ◽  
Vol 58 (4) ◽  
pp. 1203-1211 ◽  
Author(s):  
Yangyang Jiang ◽  
Chen Guo ◽  
Hongshuai Gao ◽  
Hansong Xia ◽  
Iram Mahmood ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Water Interface ◽  
Lipase Immobilization ◽  
Oil Water ◽  
Modified Magnetic Nanoparticles

Magnetic solid-phase extraction of proteins based on hydroxy functional ionic liquid-modified magnetic nanoparticles

2014 ◽  
Vol 6 (20) ◽  
pp. 8358-8367 ◽  
Author(s):  
Jing Chen ◽  
Yuzhi Wang ◽  
Xueqin Ding ◽  
Yanhua Huang ◽  
Kaijia Xu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Magnetic Solid ◽  
Extraction Performance ◽  
Modified Magnetic Nanoparticles

Hydroxy functional ionic liquids have been first designed and modified on the surface of silica-coated magnetic Fe3O4 nanoparticles (MNPs) for the investigation of the extraction performance of proteins.

scholarly journals Magnetic Solid-Phase Extraction using Ionic Liquid-Modified Magnetic Nanoparticles for The Simultaneous Extraction of Cadmium and Lead in Milk Samples; Evaluation of Measurement Uncertainty

2021 ◽  
Vol 65 (4) ◽  
Author(s):  
Sara Khodadadi ◽  
Elaheh Konoz ◽  
Ali Ezabadi ◽  
Ali Niazi
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Simultaneous Extraction ◽  
Milk Samples ◽  
Magnetic Solid ◽  
Modified Magnetic Nanoparticles

Abstract. In the present study, a new, sensitive, and rapid method was developed for extraction and determination of the trace amounts of Pb (II) and Cd (II) ions in milk samples through magnetic solid-phase extraction using DABCO based-ionic liquid-modified magnetic nanoparticles (Fe3O4/[DABCO-PDO]Cl NPs). Herein, Pb (II) and Cd (II) contents were quantified with flame atomic absorption spectroscopy (FAAS). The effect of different empirical parameters (such as sample pH, adsorbent amount, type and amount of the elution, extraction and desorption times, and the ligand concentration) was evaluated and optimized for simultaneous extraction and pre-concentration Pb (II) and Cd (II) ions. The calibration curve was linear under the optimum condition in the concentration range of 0.4-200 µgL-1 for Cd, and 0.5-120 µgL-1 for Pb, respectively. The pre-concentration factor was 67, with the detection limit of 0.09 and 0.07 µgL-1 for Pb and Cd, respectively. The relative standard deviation values (RSD %) of the proposed method were lower than 2.6 %. The developed method was successfully used to determine lead and cadmium content in milk samples. The information obtained from the method validation has been used to estimate the expanded uncertainty for the determination of Pb (II) and Cd (II) at trace levels in commercial milks.   Resumen. En este trabajo, se ha desarrollado un nuevo, sensible y rápido procedimiento para la extracción y determinación de iones Pb(II) y Cd(II) a nivel de trazas en leche, mediante extracción en fase sólida utilizando nanopartículas magnéticas modificadas con líquido iónico basado en DABCO (Fe3O4/[DABCO-PDO]Cl NPs). La determinación de ambos metales se llevó a cabo por espectrometría de absorción atómica con atomización en llama. Se ha evaluado el efecto de diferentes parámetros empíricos (tales como pH, cantidad de adsorbente, tipo y cantidad de solvente de elución, tiempo de extracción y desorción, y concentración del ligando); estos parametros fueron optimizados enfocándose en la extracción y preconcentración simultanea de ambos iones. Empleando las condiciones establecidas, se obtuvo buena linealidad de las curvas de calibración en el intervalo de concentraciones 0.4-200 µgL-1 para Cd, y 0.5-120 µgL-1 para Pb, respectivamente. Se logró el factor de preconcentración 67, con los límites de detección 0.09 y 0.07 µgL-1 para Pb y Cd, respectivamente. Los valores de desviación estandar relativa (RSD %) en el procedimiento propuesto no sobrepasaron 2.6 %. En el análisis de leche, se obtuvieron resultados satisfactorios. Los datos obtenidos en etapa de validación se utilizaron para estimar la incertidumbre expandida en la determinación de Pb y Cd a nivel de trazas en leche.

scholarly journals Characterization and Functionality of Immidazolium Ionic Liquids Modified Magnetic Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ying Li ◽  
Ning Tang ◽  
Fuyuhiko Inagaki ◽  
Chisato Mukai ◽  
Kazuichi Hayakawa
Keyword(s):  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Extraction Efficiency ◽  
Alkyl Chain ◽  
Organic Pollutant ◽  
High Adsorption ◽  
Transmission Electron ◽  
Polycyclic Aromatic ◽  
One Step ◽  
Modified Magnetic Nanoparticles

1,3-Dialkylimidazolium-based ionic liquids were chemically synthesized and bonded on the surface of magnetic nanoparticles (MNPs) with easy one-step reaction. The obtained six kinds of ionic liquid modified MNPs were characterized with transmission electron microscopy, thermogravimetric analysis, magnetization, and FTIR, which owned the high adsorption capacity due to the nanometer size and high-density modification with ionic liquids. Functionality of MNPs with ionic liquids greatly influenced the solubility of the MNPs with organic solvents depending on the alkyl chain length and the anions of the ionic liquids. Moreover, the obtained MNPs showed the specific extraction efficiency to organic pollutant, polycyclic aromatic hydrocarbons, while superparamagnetic property of the MNPs facilitated the convenient separation of MNPs from the bulks water samples.

scholarly journals Polyaniline modified magnetic nanoparticles coated with dicationic ionic liquid for effective removal of rhodamine B (RB) from aqueous solution

RSC Advances ◽  
2018 ◽  
Vol 8 (58) ◽  
pp. 33180-33192 ◽  
Author(s):  
Mohamad Shariff Shahriman ◽  
Nur Nadhirah Mohamad Zain ◽  
Sharifah Mohamad ◽  
Ninie Suhana Abdul Manan ◽  
Suhaila Mohd Yaman ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Rhodamine B ◽  
Schematic Diagram ◽  
Effective Removal ◽  
Dicationic Ionic Liquid ◽  
Modified Magnetic Nanoparticles

Schematic diagram of the removal procedure of RB on MNP-PANI-DICAT.

scholarly journals Dendritic nanofibers of gold formed by the electron transfer at the interface between water and a highly hydrophobic ionic liquid

2015 ◽  
Vol 51 (71) ◽  
pp. 13638-13641 ◽  
Author(s):  
Naoya Nishi ◽  
Tatsuya Kakinami ◽  
Tetsuo Sakka
Keyword(s):  
Electron Transfer ◽  
Ionic Liquid ◽  
Liquid Water ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Water Interface ◽  
Hydrophobic Ionic Liquid ◽  
Oil Water ◽  
Highly Hydrophobic ◽  
Conventional Oil

Novel nanostructures, dendritic nanofibers of gold, have been found to be formedviaan electron-transfer reaction at the ionic liquid–water interface, instead of the more conventional oil–water interface.

Highly dispersible bis-imidazolium/WO42− modified magnetic nanoparticles: a heterogeneous phase transfer catalyst for green and selective oxidations

2016 ◽  
Vol 40 (12) ◽  
pp. 10325-10332 ◽  
Author(s):  
Nasrin Zohreh ◽  
Maryam Tavakolizadeh ◽  
Seyed Hassan Hosseini ◽  
Mahboobeh Jahani ◽  
Ali Pourjavadi ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Recoverable Catalyst ◽  
Magnetically Recoverable Catalyst ◽  
Modified Magnetic Nanoparticles ◽  
Heterogeneous Phase

A novel magnetically recoverable catalyst was prepared in which magnetic nanoparticles were functionalized by bis-imidazolium tungstate ionic liquid molecules.

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