A simple and fast method based on functionalized magnetic nanoparticles for the determination of Ag(i), Au(iii) and Pd(ii) in mine stone, road dust and water samples

2017 ◽  
Vol 9 (19) ◽  
pp. 2873-2882 ◽  
Author(s):  
Sara Karami ◽  
Homeira Ebrahimzadeh ◽  
Ali Akbar Asgharinezhad
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Water Samples ◽  
Road Dust ◽  
Fast Method ◽  
Functionalized Magnetic Nanoparticles

A schematic for the synthesis of magnetite nanoparticles modified with murexide.

Development of an on-line solid phase extraction method based on new functionalized magnetic nanoparticles. Use in the determination of mercury in biological and sea-water samples

Talanta ◽  
2016 ◽  
Vol 153 ◽  
pp. 228-239 ◽  
Author(s):  
Elisa Vereda Alonso ◽  
M.M. López Guerrero ◽  
Pilar Colorado Cueto ◽  
José Barreno Benítez ◽  
José Manuel Cano Pavón ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
Extraction Method ◽  
Sea Water ◽  
Solid Phase ◽  
Phase Extraction ◽  
Functionalized Magnetic Nanoparticles ◽  
On Line

scholarly journals ESR as a monitoring method of the interactions between TEMPO-functionalized magnetic nanoparticles and yeast cells

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ryszard Krzyminiewski ◽  
Bernadeta Dobosz ◽  
Grzegorz Schroeder ◽  
Joanna Kurczewska
Keyword(s):  
Magnetic Nanoparticles ◽  
Drug Carriers ◽  
Magnetic Core ◽  
Yeast Cells ◽  
Spin Labels ◽  
Monitoring Method ◽  
Functionalized Magnetic Nanoparticles ◽  
Spin Resonance

AbstractPotential application of magnetic nanoparticles as drug carriers in medical treatment requires prior determination of their effects on cells. In this work different spin labels and magnetic nanoparticles functionalized with spin labels as well as their interaction with yeast cells were investigated using electron spin resonance (ESR) method. ESR was demonstrated to be a suitable method for monitoring of magnetic core and attached spin labels. Particular emphasis was placed on characterization of endocytosis and redox processes running inside the cell, resulting in recombination of spin labels. Such data could only be obtained at reduced temperature of ESR measurements.

Determination of Organophosphorous Pesticides in Environmental Water Samples Using Surface-Engineered C18 Functionalized Silica-Coated Core-Shell Magnetic Nanoparticles–Based Extraction Coupled with GC-MS/MS Analysis

2017 ◽  
Vol 100 (3) ◽  
pp. 804-809 ◽  
Author(s):  
Neha Srivastava ◽  
Supriya Kumari ◽  
Kishore Nair ◽  
Samsul Alam ◽  
Syed K Raza
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Core Shell ◽  
Aqueous Sample ◽  
Functionalized Silica ◽  
Method Performance ◽  
Ms Analysis

Abstract The present paper depicts a novel method based on magneticSPE (MSPE) for the determination of organophosphorus pesticides (OPs) such as phorate, malathion, and chlorpyrifos in environmental water samples. In this study, C18 functionalized silica-coated core-shell iron oxide magnetic nanoparticles (MNPs) were used as a surface-engineered magnetic sorbent for theselective extraction of pesticides from aqueous samples, followed by GC-MS and GC–tandem MS analysis for confirmative determination of the analytes. Various important method parameters, including quantity of MNP adsorbent, volume of sample, effective time for extraction, nature of the desorbing solvent, and pH of the aqueous sample, were investigated and optimized to obtain maximum method performance. Under the optimized instrumental analysis conditions, good linearity (r2 value ≥0.994) was achieved at the concentration range of 0.5–500 μg/L. Recoveries were in therange of 79.2–96.3 and 80.4–97.5% in selective-ion monitoring and multiple reaction monitoring (MRM) modes, respectively, at the spiking concentrations of 1, 5, and 10 μg/L. MRM mode showed better sensitivity, selectivity, and low-level detection (0.5 μg/L) of analytes. The novel MSPE method is a simple, cheap, rapid, and eco-friendly method for the determination of OPs in environmental water samples.

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