scholarly journals Understanding Selectivity of Mesoporous Silica-Grafted Diglycolamide-Type Ligands in the Solid-Phase Extraction of Rare Earths

2020 ◽  
Vol 12 (51) ◽  
pp. 57003-57016
Author(s):  
Justyna Florek ◽  
Dominic Larivière ◽  
Hanspeter Kählig ◽  
Sonia L. Fiorilli ◽  
Barbara Onida ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Rare Earths ◽  
Solid Phase ◽  
Phase Extraction

scholarly journals SPION-decorated organofunctionalized MCM48 silica-based nanocomposites for magnetic solid-phase extraction

2021 ◽  
Vol 2 (3) ◽  
pp. 963-973
Author(s):  
Daniel Garcia-Osorio ◽  
Helton P. Nogueira ◽  
Josué M. Gonçalves ◽  
Sergio H. Toma ◽  
Sergio Garcia-Segura ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Critical Micellar Concentration ◽  
Phase Extraction ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Magnetic Solid ◽  
Magnetic Recovery

(a) Cubic structures formed by CTAB above critical micellar concentration used as a template to generate highly ordered mesoporous silica. (b) Photo showing the magnetic recovery of MCM48/SPION/C8 nanocomposite in 60 s.

Mesoporous silica sorbent with gold nanoparticles for solid-phase extraction of organochlorine pesticides in water samples

2021 ◽  
pp. 462729
Author(s):  
Enric Pellicer-Castell ◽  
Carolina Belenguer-Sapiña ◽  
Pedro Amorós ◽  
Jamal El Haskouri ◽  
José Manuel Herrero-Martínez ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Organochlorine Pesticides ◽  
Water Samples ◽  
Solid Phase ◽  
Phase Extraction ◽  
Pesticides In Water

Simultaneous extraction of permethrin diastereomers and deltamethrin in environmental water samples based on aperture regulated magnetic mesoporous silica

2020 ◽  
Vol 44 (37) ◽  
pp. 16152-16162
Author(s):  
Meixing Zhang ◽  
Jie Mei ◽  
Siying Lv ◽  
Jiahao Lai ◽  
Xiaoni Zheng ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Phase Extraction ◽  
Simultaneous Extraction ◽  
Magnetic Solid ◽  
Magnetic Mesoporous Silica

The aperture of KIT-6 can influence the recoveries of magnetic solid phase extraction.

SOLID-PHASE EXTRACTION OF PHTHALATE ESTERS FROM AQUEOUS SAMPLES USING MESOPOROUS SILICA-COATED MULTIWALLED CARBON NANOTUBES AND THEIR DETERMINATION BY HPLC

NANO ◽  
2014 ◽  
Vol 09 (04) ◽  
pp. 1450054 ◽  
Author(s):  
XIAOYING DENG ◽  
XIAOQING CHEN ◽  
XINYU JIANG
Keyword(s):  
Carbon Nanotubes ◽  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Multiwalled Carbon Nanotubes ◽  
Solid Phase ◽  
Phthalate Esters ◽  
Phase Extraction ◽  
Aqueous Samples ◽  
Multiwalled Carbon ◽  
Relative Standard

We report a novel solid-phase extraction adsorbent for the preconcentration of three phthalate esters (PAEs) from aqueous samples. The material was obtained by modifying multiwalled carbon nanotubes (MWCNTs) with mesoporous silica. The structural characterization of the adsorbent was conducted by Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM) and N 2 adsorption–desorption measurement, which confirmed the successful coating of mesoporous silica on MWCNTs and the adsorbent possessing large surface and porous structure. The effects of adsorbent amount, type and volume of eluent and sample pH on extraction efficiency were optimized. Following extraction, the PAEs were quantified by high performance liquid chromatography (HPLC). Under optimal conditions, the recoveries ranged from 89.8% to 96.3%. The calibration plot was linear in the 3–1000 ng⋅mL-1 concentration range, with correlation coefficients ranging from 0.9993 to 0.9995. The repeatability of the method, expressed as relative standard deviation (RSD), ranged from 3.8% to 7.7% (for n = 5). Limits of detection (LODs) were between 0.28 ng mL-1 and 0.53 ng⋅mL-1. The relative recoveries (RR) for spiked river water, pond water and tap water samples were in the ranges of 80.9–98.0%, 82.7–96.1% and 88.3–95.5%, respectively. The results showed that the method obviously had a large potential for preconcentration and determination of PAEs in environmental samples.

scholarly journals Magnetic Solid Phase Extraction using Magnetic Mesoporous Silica for Preconcentration of Organophosphorus Pesticides

2019 ◽  
Vol 8 (4) ◽  
pp. 6847-6852
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
High Performance ◽  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Magnetic Solid ◽  
Mcm 41

The present study describes the synthesis, characterization and application of two mesoporous silica material based coated magnetic nanoparticles namely Fe3O4 -SBA-15 and Fe3O4 -MCM-41 for the simultaneous preconcentration of three selected organophosphorus pesticides (OPPs) namely chlorpyrifos, diazinon and parathion methyl from water samples. The resultant sorbent material was physicochemically and morphologically characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and N2 adsorption analysis. OPPs pesticides extraction efficiency of two sorbents were evaluated through magnetic solid phase extraction (MSPE) using high performance liquid chromatography with ultraviolet detector (HPLC/UV). The main parameters affecting the sorbent efficiency namely extraction time and desorption solvent were optimized. Comparatively, Fe3O4 -SBA-15 achieved excellent percent recovery (97.5%) compared to the Fe3O4 -MCM-41 (87.1%) under optimum condition respectively. The result appealed that the Fe3O4 -SBA-15 composite was efficient sorbent with good capability for the preconcentration of selected OPPs from water samples.AThe present study describes the synthesis, characterization and application of two mesoporous silica material based coated magnetic nanoparticles namely Fe3O4 -SBA-15 and Fe3O4 -MCM-41 for the simultaneous preconcentration of three selected organophosphorus pesticides (OPPs) namely chlorpyrifos, diazinon and parathion methyl from water samples. The resultant sorbent material was physicochemically and morphologically characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and N2 adsorption analysis. OPPs pesticides extraction efficiency of two sorbents were evaluated through magnetic solid phase extraction (MSPE) using high performance liquid chromatography with ultraviolet detector (HPLC/UV). The main parameters affecting the sorbent efficiency namely extraction time and desorption solvent were optimized. Comparatively, Fe3O4 -SBA-15 achieved excellent percent recovery (97.5%) compared to the Fe3O4 -MCM-41 (87.1%) under optimum condition respectively. The result appealed that the Fe3O4 -SBA-15 composite was efficient sorbent with good capability for the preconcentration of selected OPPs from water samples.

Solid phase extraction of Pb(II) in water samples using a new hybrid inorganic-organic mesoporous silica prior to its determination by FAAS

2009 ◽  
Vol 165 (3-4) ◽  
pp. 291-298 ◽  
Author(s):  
Damián Pérez-Quintanilla ◽  
Alfredo Sánchez ◽  
Isabel del Hierro ◽  
Mariano Fajardo ◽  
Isabel Sierra
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Phase Extraction
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