Zero-velocity Magnetophoretic Method for the Determination of Particle Magnetic Susceptibility

A simple zero-velocity method to determine the particle magnetic susceptibility by measuring the magnetophoretic velocity was proposed. The principle is that the magnetophoretic velocity of a particle in a liquid medium must be zero when the magnetic susceptibilities of the medium and the particle a...

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Bibliographic Details
Published in:Analytical Sciences 2014/07/10, Vol.30(7), pp.745-749
Main Authors: WATARAI, Hitoshi, DUC, Hoang Trong Tien, LAN, Tran Thi Ngoc, ZHANG, Tianyi, TSUKAHARA, Satoshi
Format: Article
Language:English
Subjects:
Analytical Chemistry
Balancing
Chemistry
Gravitation
Liquids
Magnetic permeability
Magnetic susceptibility
Magnetophoresis
magnetophoretic velocimetry
Mathematical analysis
micro particle
Migration
Solvents
zero-velocity method
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Summary:A simple zero-velocity method to determine the particle magnetic susceptibility by measuring the magnetophoretic velocity was proposed. The principle is that the magnetophoretic velocity of a particle in a liquid medium must be zero when the magnetic susceptibilities of the medium and the particle are equal, or the gravity force and the magnetophoretic force are balanced. By changing the medium magnetic susceptibility and measuring the magnetophoretic velocity of a particle, the particle magnetic susceptibility was determined from the medium magnetic susceptibility under the zero-velocity condition. The feasibility of the method was demonstrated for polystyrene particles using a Dy(III) solution in the horizontal migration mode and different organic solvents in the vertical migration mode.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.30.745