Investigation on Novel Magnetic Chromatography With Ferromagnetic Nano-Wires for Ion Separation

Abstract

Abstract-Magnetic chromatography is a very useful system for ion and/or fine magnetic particle separation due to strong magnetic field gradients in a very small flow channel. We have developed the magnetic chromatography system to separate the ions and fine particles. It is, however, difficult to separate the ions or the magnetic particles using the developed magnetic chromatography. It makes the strong magnetic field gradients in the flow channel, but the alternate direction of the gradient is not suitable for magnetic separation. Therefore, we have newly designed a novel magnetic column with ferromagnetic nano-wires. In this paper, the new magnetic column is presented, and the magnetic field and its gradients in the flow channel are investigated.

Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography

“…The approach pursued in this work comprises the magnetic interaction of MNPs with a magnetically responsive chromatography matrix. Some studies, such as those by Nomizu, Ohara and Kim et al [37][38][39], used magnetochromatographic methods with external magnetic fields for the fractionation of ultrafine particles. However, in a previous work we already observed size fractionation effects for MNPs in a magnetically responsive matrix without the use of an external magnetic field [40].…”

Magnetic Field and Fluid Flow Computation of Plural Kinds of Magnetic Particles for Magnetic Separation

“…Therefore, various magnetic separation systems have been designed, developed and demonstrated [1]- [4]. We have also developed a magnetic chromatography system in order to separate the fine magnetic particles and ions [5]- [7]. In a developed magnetic chromatography system, ferromagnetic wires width of 200 m, that generate the magnetic field gradients, are located on the upper and lower walls.…”