title: Magnetic particle characterization-magnetophoretic mobility and particle size.
abstract: Quantitative characterization of magnetic particles is useful for analysis and separation of labeled cells and magnetic particles. A particle velocimeter is used to directly measure the magnetophoretic mobility, size, and other parameters of magnetic particle suspensions. The instrument provides quantitative video analysis of particles and their motion. The trajectories of magnetic particles in an isodynamic magnetic field are recorded using a high-definition camera/microscope system for image collection. Image analysis software then converts the image data to the parameters of interest. The distribution of magnetophoretic mobility is determined by combining fast image analysis with velocimetry measurements. Particle size distributions have been characterized to provide a better understanding of sample quality. The results have been used in the development and operation of analyzer protocols for counting particle concentrations accurately and measuring magnetic susceptibility and size for simultaneous display for routine application to particle suspensions and magnetically labeled biological cells. © 2016 International Society for Advancement of Cytometry.
authors.affiliation: Department of Chemical Engineering, Auburn University, Alabama, 36849.
authors.forename: Chen
authors.initials: C
authors.lastname: Zhou
authors.affiliation: Techshot, Inc, 7200 Highway 150, Greenville, Indiana, 47124.
authors.forename: Eugene D
authors.initials: ED
authors.lastname: Boland
authors.affiliation: Techshot, Inc, 7200 Highway 150, Greenville, Indiana, 47124.
authors.forename: Paul W
authors.initials: PW
authors.lastname: Todd
authors.affiliation: Department of Chemical Engineering, Auburn University, Alabama, 36849.
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Hanley
mesh_terms: D007091:Image Processing, Computer-Assisted; D018189:Immunomagnetic Separation / Q000295:instrumentation / Q000379:methods*; D059346:Magnets / Q000032:analysis* / Q000737:chemistry; D057054:Molecular Imaging / Q000295:instrumentation / Q000379:methods*; D010316:Particle Size; D012212:Rheology / Q000295:instrumentation / Q000379:methods; D012984:Software; D014741:Video Recording
keywords: image cytometry; magnetic carriers; magnetic particles; magnetophoretic mobility; particle size distribution