scholarly journals In vitro speciation of molybdenum in human biological samples based on thiol functionalized mesoporous silica nanoparticles and hexyl-methylimidazolium tris-pentafluoroethyl-trifluorophosphate

2020 ◽  
Vol 3 (03) ◽  
pp. 54-64
Author(s):  
Roya Ashori ◽  
Seyed Alireza Hajiseyed Mirzahosseini
Keyword(s):  
Ionic Liquid ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Biological Samples ◽  
Solid Phase ◽  
Mesoporous Silica Nanoparticles ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Serum Samples ◽  
Functionalized Mesoporous Silica

Molybdenum (Mo) ions enter to human body from the diet or drinking waters and have a potentially toxic effect on humans. The thiol-functionalized mesoporous silica nanoparticles (HS-MSNPs) were used for determination and speciation of Mo (II, VI) in human biological samples by dispersive ionic liquid-micro-solid phase extraction (DIL-μ-SPE) coupled to electrothermal atomic absorption spectrometry (ET-AAS). Firstly, the mixture of HS-MSNPs (15 mg), the hydrophobic ionic liquid (1-Hexyl-3-methylimidazolium tris(pentafluoroethyl) trifluorophosphate; [HMIM][T(PFE)PF3]) and acetone injected into 10 mL of human blood and serum samples. After shaking for 5 min, the Mo(II) and Mo(VI) ions were extracted with the thiol group of MSNPs at pH 6 and 2, respectively, and collected through IL at the bottom of the conical tube by centrifuging. Then, the MO(II,VI) ions were back-extracted from HS-MSNPs with elent based on changing pH, and remained solutions were determined by ET-AAS after dilution with DW up to 0.5 mL, separately.

scholarly journals Separation and determination of lead in human urine and water samples based on thiol functionalized mesoporous silica nanoparticles packed on cartridges by micro column fast micro solid-phase extraction

2019 ◽  
pp. 39-50 ◽  
Author(s):  
Maling Gou ◽  
*Baharak Bahrami Yarahmadi
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Silica Nanoparticles ◽  
Water Samples ◽  
Solid Phase ◽  
Mesoporous Silica Nanoparticles ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Cellulose Membrane ◽  
Phase Extraction ◽  
Functionalized Mesoporous Silica

An efficient method based on thiol functionalized mesoporous silica nanoparticles (HS-MSNPs) was used for extraction of lead ions (PbII) from urine and water samples by packed column micro solid phase extraction (PC-MSPE). By procedure, 15 mg of HS-MSNPs packed in syringe cartridges (SC, 5 mL) with cellulose membrane and pH adjusting at 5.5-6.5.  Then, the lead of urine and water sample was efficiently extracted on HS-MSNPs after pushing the plunger of a syringe. Finally, the Pb (II) was back-extracted with inorganic acid solution and the remained solution determined by electrothermal atomic absorption spectrometry (ET-AAS). By optimization conditions, the enrichment factor, LOD, linear range and RSD% was obtained 24.8, 0.04 μg L-1, 0.12-5.5 μg L-1 and less than 5%, respectively for 5 mL of urine samples. The validation was confirmed by spiking of real samples and using certified reference material (CRM, NIST) in water and urine sample.

scholarly journals Air Pollution Method: A new method based on ionic liquid passed on mesoporous silica nanoparticles for removal of manganese dust in the workplace air

2019 ◽  
Vol 2 (01) ◽  
pp. 5-14 ◽  
Author(s):  
Parisa Paydar ◽  
Ali Faghihi Zarandi
Keyword(s):  
Ionic Liquid ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Solid Phase ◽  
Mesoporous Silica Nanoparticles ◽  
Adsorption Method ◽  
Adsorption Removal ◽  
Workplace Air ◽  
Set Up ◽  
System 1

Chronic effect of manganese exposure to humans caused the dysfunction of nervous system. An applied sorbent based on hydrophobic ionic liquid passed on mesoporous silica nanoparticles was used for adsorption/removal of manganese dust (Mn) from workplace air by solid phase adsorption method. In bench scale set up, 5 mL of standard solution of nitrate and oxide of Mn (0.2-5 mg L-1) was used for generation of manganese dust in pure air by drying procedure, and then was passed through column of IL/MSNPs by SKC pump with flow rate  of 200-500 mL min-1 by SKC pump. The Mn particles separated from column of IL/MSNPs by irrigation of nitric acid solution before determined by F-AAS/ET-AAS. In optimized conditions, the adsorption capacity of MSNPs and IL/MSNPs for Mn removal from air in batch system (1 Li) was obtained 118.5 mg g-1 and 216.2 mg g-1, respectively.

scholarly journals In vitro Studies of Functionalized Mesoporous Silica Nanoparticles for Photodynamic Therapy

2009 ◽  
Vol 21 (2) ◽  
pp. 172-177 ◽  
Author(s):  
Hsiung-Lin Tu ◽  
Yu-Shen Lin ◽  
Hsia-Yu Lin ◽  
Yann Hung ◽  
Leu-Wei Lo ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
In Vitro Studies ◽  
Functionalized Mesoporous Silica
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