Magnetic multiwall carbon nanotubes modified with dual hydroxy functional ionic liquid for the solid-phase extraction of protein

The Analyst ◽  
2015 ◽  
Vol 140 (10) ◽  
pp. 3474-3483 ◽  
Author(s):  
Jing Chen ◽  
Yuzhi Wang ◽  
Yanhua Huang ◽  
Kaijia Xu ◽  
Na Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Multiwall Carbon Nanotubes ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Magnetic Solid ◽  
Surface Modified ◽  
Multiwall Carbon

A novel adsorbent based on silica-coated magnetic multiwall carbon nanotubes (MWCNTs) surface modified by dual hydroxy functional ionic liquid (FIL) ([OH]-FIL-m-MWCNTs@SiO2) has been designed and used for the purification of lysozyme (Lys) by magnetic solid-phase extraction (MSPE).

scholarly journals Ionic liquid functionlized on multiwall carbon nanotubes for nickel and lead determination in human serum and urine samples by micro solid-phase extraction

2021 ◽  
Vol 4 (02) ◽  
pp. 72-85
Author(s):  
Arezou Lari ◽  
Nafiseh Esmaeili ◽  
Homanaz Ghafari
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Liquid Phase ◽  
Solid Phase Extraction ◽  
Human Serum ◽  
Solid Phase ◽  
Multiwall Carbon Nanotubes ◽  
Urine Samples ◽  
Phase Extraction ◽  
Multiwall Carbon

In this study, a novel synthesis adsorbent, 1-(3-aminopropyl)-3-methylimidazolium hexafluorophosphate functionlized on multiwall carbon nanotubes ([Apmim][PF6]-MWCNTs, IL@MWCNTS) was used for nickel/lead (Ni/Pb) extraction and determination by dispersive ionic liquid micro solid-phase extraction (DIL-μ-SPE) coupled to electrothermal atomic absorption spectrometry (ET-AAS). After dilution of 20 mg of IL@MWCNTS in 200 μL of acetone, the mixture was injected to 10 mL of human serum/urine samples at pH of 8.0. After sonication for 5 min, the Ni(II) / Pb(II) were extracted by ionic liquid phase and then centrifuged for 2.5 min. The upper liquid phase set aside and Ni(II) / Pb(II) loaded in adsorbent were back-extracted by acidic solution at pH=2-3. Finally, the concentration of total nickel and lead was determined by ET-AAS. By optimizing, the limit of detection, linear range, and enrichment factor for nickel and lead were obtained (0.05 μg L−1; 0.1 μg L−1), (0.2-5.8 μg L−1; 0.4-30 μg L−1) and 24.7; 5.1, respectively (RSD less than 5%). Also, the capacity absorption of IL@MWCNTS for nickel and lead ions were achieved 149.3 mg g-1 and 162.5 mg g-1, respectively.  The DIL-μ-SPE procedure was validated for nickel and lead extraction by spiking of real samples and ICP-MS analyzer.

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

RSC Advances ◽  
2019 ◽  
Vol 9 (67) ◽  
pp. 39272-39281 ◽  
Author(s):  
Xiaodong Huang ◽  
Yanan Liu ◽  
Huifang Liu ◽  
Guangyang Liu ◽  
Xiaomin Xu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Zeolitic Imidazolate Framework ◽  
Pyrethroid Insecticides ◽  
Tea Infusions ◽  
Magnetic Solid

A MSPE-GC-MS/MS method was developed for the analysis of pyrethroids from tea infusions using Fe3O4/ZIF-8/IL as an adsorbent.

scholarly journals Multi-Walled Carbon Nanotubes for Magnetic Solid-Phase Extraction of Six Heterocyclic Pesticides in Environmental Water Samples Followed by HPLC-DAD Determination

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5729
Author(s):  
Jiping Ma ◽  
Liwei Hou ◽  
Gege Wu ◽  
Liyan Wang ◽  
Xiaoyan Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Phase Extraction ◽  
Multi Walled Carbon Nanotubes ◽  
Magnetic Solid ◽  
Walled Carbon Nanotubes

Magnetic multi-walled carbon nanotubes were prepared as magnetic solid-phase extraction (MSPE) adsorbent for the enrichment of six heterocyclic pesticides in environmental water samples, including imidacloprid, triadimefon, fipronil, flusilazole, chlorfenapyr and fenpyroximate. Then six heterocyclic pesticides were separated and determined by high-performance liquid chromatography-diode-array detector (HPLC-DAD). Major factors influencing MSPE efficiency, including the dose of mag-multi-walled carbon nanotubes (mag-MWCNTs), extraction time, solution pH, salt concentration, type and volume of eluent and desorption time were investigated. Under the optimized conditions, the enrichment factor of the method reached to 250. The linearity was achieved within 0.05–10.0 μg/L for imidacloprid and chlorfenapyr, 0.10–10.0 μg/L for fipronil, flusilazole, triadimefon and fenpyroximate. Limits of detection were in the range of 0.01–0.03 μg/L. Good precision at three spiked levels were 1.1–11.2% (intra-day) and 1.7–11.0% (inter-day) with relative standard deviation of peak area, respectively. The developed method was utilized to analyze tap water, river water and reservoir water samples and recoveries at three spiked concentration levels ranged from 72.2% to 107.5%. The method was proved to be a convenient, rapid and practical method for sensitive determination of heterocyclic pesticides.

Magnetic Solid-Phase Extraction of Drugs and Pesticides from Human Plasma using COOH-mMWCNTs

2020 ◽  
Author(s):  
Heesung Moon ◽  
Jiwon Park ◽  
Jinwoo Hwang ◽  
Heesun Chung
Keyword(s):  
Carbon Nanotubes ◽  
Carboxylic Acid ◽  
Solid Phase Extraction ◽  
Human Plasma ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
University Hospital ◽  
Phase Extraction ◽  
National University ◽  
Magnetic Solid

Abstract Carbon nanotubes (CNT) are useful for extracting chemical compounds due to their properties, such as surface area and the potential for chemical modification. Especially the formation of carbon nanotubes with carboxylic acid functional group makes them disperse in water-based samples and have strong interaction forces with cationizable analytes. Based on these features, carboxylic acid functionalized multi-walled carbon nanotubes (COOH-MWCNTs) have been used as extraction sorbents. CNT also can be gathered using an external magnet by forming complex with iron oxide (Fe3O4) magnetic nanoparticles (MNPs). In this study, COOH-MWCNTs with MNPs were subjected to magnetic solid phase extraction (mSPE) in order to extract the targeted substances such as diphenhydramine, doxylamine, tramadol, escitalopram, zolpidem, diphenamid, paclobutrazol, hexaconazole, cyproconazole, and mepronil from human plasma samples. The following five factors were optimized: [1] the ratio of COOH-MWCNTs to MNPs as a sorbent from 1: 1 to 1: 4; [2] sorbent amount starting from 12.5% to 75%; [3] sample pH tested pH 2 to pH 10 with 1 N hydrochloride and 1 N sodium hydroxide; [4] agitating time from 0 min to 4 min; [5] elution solvent. LOD of 10 targeted substances in human plasma were in the range of 0.1 to 0.4 mg/L. The recovery of targeted substances (except diphenamid) in human plasma was 73.06–110.28% for intra-day, 83.00–107.70% for inter-day and the precision (RSD, %) in human plasma was 0.3–13.3% for intra-day, 2.9–15.6%. The method was applied to 9 authentic biological samples from overdose patients in the emergency room of Chung-nam National University Hospital. The performance of mSPE was compared with the liquid–liquid extraction (LLE) method using ethyl acetate. The results showed that the newly developed method in this study can be used for screening analysis in forensic and clinical toxicology.

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.

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