Abstract
Super paramagnetic maghemite γ-Fe 2 O 3 nanoparticles (average diameter of ~10 nm) are applied for the selective binding of radioactive strontium-85 using 4,4’(5’)- di-(t-butyldicyclo-hexano)18-crown-6 as a chelating agent. These magnetic nanoparticles offer easy separation once strontium is complexed with the crown ether. Binding test results demonstrate a 65% uptake of Sr 2+ by gamma
Highlights
Application of crown ether for selective extraction and determination of radio isotopes of strontium is well established
This work demonstrated the significance of magnetic separation, rather than centrifugation/ filtration, as a rapid, efficient, and energy saving method for sample treatment in analytical applications
Strontium binding tests successfully showed 66% (± 15%) uptake by the crown ether-bound Magnetic Nanoparticles (MNPs), which was superior to only 23% (± 10%) by the non-bound particles
Summary
Application of crown ether for selective extraction and determination of radio isotopes of strontium is well established. This research utilizes Magnetic Nanoparticles (MNPs) as the primary separation tool for strontium ions in aqueous sample. Magnetic separation has been found to be effective when handling particles on a Nanosize scale (1-10 nm) [1,2,3]. Magnetic separation is an affordable and efficient alternative to centrifugation and filtration. It overcomes problems such as blocking of filters and allows the handling of large samples. Magnetic separation allows for accelerated sedimentation of particles when an external field is applied, making separation and purification steps experimentally simple
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