scholarly journals Determination of Thorium and Uranium in Nickel-based Alloys by ICP-MS After Matrix Separation Using Novel Co-polymer of Ethylene Glycol Methacrylate and Bis[2-methacryloyloxy)ethyl] Phosphate

2018 ◽  
Vol 39 (4) ◽  
pp. 142-150
Author(s):  
M.V. Balarama Krishna ◽  
Sankararao Chappa ◽  
K. Chandrasekaran ◽  
D. Karunasagar ◽  
Ashok K. Pandey
Keyword(s):  
Ethylene Glycol ◽  
Glycol Methacrylate ◽  
Matrix Separation ◽  
Icp Ms ◽  
Ethyl Phosphate

scholarly journals Multielemental Determination of Rare Earth Elements in Seawater by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) After Matrix Separation and Pre-concentration With Crab Shell Particles

2021 ◽  
Vol 9 ◽  
Author(s):  
Danyi Li ◽  
Xunuo Wang ◽  
Ke Huang ◽  
Zenghuan Wang
Keyword(s):  
Mass Spectrometry ◽  
Rare Earth ◽  
Inductively Coupled Plasma ◽  
Crab Shell ◽  
Inductively Coupled ◽  
Matrix Separation ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Shell Particles

Considering the unique characteristics of rare earth elements (REEs), the presence of REEs beyond specific limits will adversely affect the environment and it can be employed as a powerful probe for investigating hydrogeochemical processes. This requires sensitive determination of REEs in natural seawater. A matrix separation and pre-concentration technique using the mini-column packed with crab shell particles (CSPs) by inductively coupled plasma mass spectrometry (ICP-MS) as a means of determination has been developed. The aim of the proposed method was to simultaneously determine 16 REEs (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) at trace or ultra-trace concentrations in seawater. The biosorption capacity of CSPs was found to achieve 1.246–1.250 mg g−1 for all elements. In order to optimize performance of the method, the effects of analytical parameters concerning oscillation time, solution pH, salt concentration and eluent concentration were explored. Under the optimal conditions, the detection limits of REEs ranged 0.0006–0.0088 μg L−1, and relative standard deviations (n = 7) varied between 0.55 and 1.39%. The accuracy of developed method was evidenced by applying it to the analysis of REEs in seawater samples, with the overall recoveries at a level of 95.3 and 104.4%. Together, this work provides a promising and cost-effective CSPs-based pretreatment approach for REEs detection in sea environment.

scholarly journals Poly[oligo(ethylene glycol) methacrylate]-b-poly[(vinyl benzyl trimethylammonium chloride)] Based Multifunctional Hybrid Nanostructures Encapsulating Magnetic Nanoparticles and DNA

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1283
Author(s):  
Angeliki Chroni ◽  
Aleksander Forys ◽  
Barbara Trzebicka ◽  
Adam Alemayehu ◽  
Vaclav Tyrpekl ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Ethylene Glycol ◽  
Hybrid Nanostructures ◽  
Trimethylammonium Chloride ◽  
Dna Nanostructures ◽  
Glycol Methacrylate ◽  
Transmission Electron ◽  
Oppositely Charged ◽  
Vinyl Benzyl

We report on the preparation of novel and multifunctional hybrid spherical-shaped nanostructures involving a double-hydrophilic block copolymer, namely the neutral cationic poly[oligo(ethylene glycol) methacrylate]-b-poly[(vinyl benzyl trimethylammonium chloride)] (POEGMA-b-PVBTMAC) diblock copolymer, initially complexed with hydrophilic anionic magnetic nanoparticles (MNPs), and subsequently, with short deoxyribonucleic acid (113 bases DNA). The POEGMA-b-PVBTMAC copolymer, the copolymer/MNPs and the copolymer/MNPs/DNA tricomponent hybrid electrostatic complexes were studied by dynamic/electrophoretic light scattering (DLS/ELS) and cryogenic transmission electron microscopy (cryo-TEM) techniques for the determination of their structure and solution properties. The MNPs were complexed efficiently with the oppositely charged diblock chains, leading to well-defined hybrid organic–inorganic spherical-shaped nanostructures. A significant aggregation tendency of the MNPs is noticed in cryo-TEM measurements after the electrostatic complexation of DNA, implying an accumulation of the DNA macromolecules on the surface of the hybrid tricomponent complexes. Magnetophoretic experiments verified that the MNPs maintain their magnetic properties after the complexation initially with the copolymer, and subsequently, within the block polyelectrolyte/MNPs/DNA nanostructures.

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