Modification of a Porous Sheet (MAPS) for the High-Performance Solid-Phase Extraction of Trace and Ultratrace Elements by Radiation-Induced Graft Polymerization

Abstract

They exhibited that the optimization of the retention parameters, e.g., particle sizes, bed length, and sorbent, provides more reliable and less tedious procedures. Recently, automation approaches using flow-processing and on-line analyzers directly 2010 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. Chemistry and Biotechnology, Chiba University, Inage, Japan In this review, the preparation of a novel porous sheet designed for solid-phase extraction (SPE) and a comparison of the preconcentration performance of metal ions with conventional sorbents are described. A porous sheet (MAPS) with an average pore diameter, porosity, and a thickness of 1.0 μm, 75%, and 2 mm, respectively, was modified into an sorbent used for solid-phase extraction, by radiation-induced graft polymerization. Ion-exchange and chelating groups were immobilized onto polymer chains grafted to the MAPS. Also, extractants were impregnated via a hydrophobic interaction with long alkyl chains introduced into the grafted polymer chains of the MAPS. The applicability of the resultant modified MAPSs was demonstrated by adopting them to analyses of real samples.

Klein Nishina Differential Equation for the Selection of Radiation Shielding Material (C, AL, Fe, and Zn) on the Basis of Attenuation and Cross sectional Area

“…Therefore, researchers and scientists are working to replace lead with bismuth, tungsten, barium, tin, cerium, and antimony. This is due to process the material into a thin film, a base material with excellent flexibility is preferred [11][12][13][14][15]. The energy of photons like X-rays and gamma rays is shield with the lower the atomic number with minimal thickness.…”

Analysis of the Correlation between Shielding Material Blending Characteristics and Porosity for Radiation Shielding Films

“…Currently, a combination of lead and rubber is most frequently used. Heat treatment methods are often used to mix rubber and lead powder [5]. When blending a shielding substance in the manufacturing process, it is difficult to disperse molecules and maintain a homogeneous dispersion.…”

Diglycolamic Acid–Grafted Film-Type Adsorbent for Selective Recovery of Rare Earth Elements

“…Therefore, we focused on graft polymerization as a method for introducing a ligand to the support to improve its adsorption capacity. Graft polymerization has been used to introduce ligands to various forms of trunk polymers [21], and this method is expected to be useful for increasing ligand loading without reducing adsorption rate. The trunk polymers that were subjected to graft polymerization were in film form instead of in bead form.…”