Superparamagnetic bi-functional composite bead for the thermal ionization mass spectrometry of plutonium(iv) ions

Abstract

Single resin bead-based thermal ionization mass spectrometry (TIMS) offers numerous advantages for Pu(iv) determinations in complex aqueous samples.

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and functional materials

“…In one, the Pu IV was retained on superparamagnetic magnetite (Fe 3 O 4 ) nanoparticles that had been made into a bead encased in a silica coating and that had been given quaternary ammonium functional groups. 184 The preparation of the material was described in detail. This material was more selective for Pu IV than the anion exchange resins that had been used previously and, because of its magnetic properties, was also easier to retrieve from large volumes of sample.…”

Rapid and precise determination of the 238Pu/239Pu isotope ratio using thermal ionization mass spectrometry

“…Novel polymeric substrates have been reported from our laboratory for rapid and selective separation of actinides from complex matrices as well as partitioning of plutonium and uranium in an acidic medium. [19][20][21][22][23][24] The method is based on a supported liquid membrane (DOHA-PP) containing a hydrophobic, liquid extractant N,N ′ -dioctyl-a-hydroxyacetamide (DOHA) in dodecane, that was found to be highly selective towards Pu(IV) in a 3-4 M nitric acid medium, compared to other actinides such as Am(III), Np(V) and U(VI). Using a DOHA-PP membrane, it was possible to measure the 238 Pu/ 239 Pu atom ratio by TIMS i.e.…”

Rapid and Precise Uranium Isotopic Screening in Natural Water Using Bis(2-ethylhexyl)phosphoric Acid-Modified Membranes

“…A new emerging viable alternative is the direct analysis of uranium preconcentrated in a solid phase that can be loaded on a rhenium filament for TIMS analysis. Anion-exchange or bifunctional beads have been developed for preconcentration and TIMS analysis of Pu­(IV) and U­(VI) ions, , but it is difficult to mount a circular bead on a flat filament, and specially designed “V”- or “U”-shaped filaments are required to hold the bead at a fixed position. We have previously developed and reported various functionalized polymeric membranes that are capable of fast and efficient preconcentration of actinides from aqueous matrices and, at the same time, amenable to easy and hassle-free loading on a flat filament for TIMS analysis. − …”