A method for analyzing affinity of dispersoid particles (s) for a dispersion medium (m) in which the dispersoid particles (s) are dispersed, the method comprising: obtaining a dispersoid volume susceptibility (χs) by magnetophoresis, using an analyzing apparatus including a magnetic field generating section, a measurement section, and an operation section, the obtaining including the steps of: disposing a disperse system that is the dispersion medium (m) in which the dispersoid particles (s) are dispersed in the vicinity of the magnetic field generating section; causing the magnetic filed generating section to generate a magnetic field in the disperse system, whereupon the dispersoid particles (s) will perform magnetic migration in the dispersion medium (m); causing the measurement section to measure movement (magnetic migration) of the dispersoid particles (s) in the dispersion medium (m) while the magnetic field generating section generates the magnetic field; causing the operation section to obtain magnetic migration speeds of the respective dispersoid particles (s) from a measurement result by the measurement section; and causing the operation section to obtain the dispersoid volume susceptibility (χs) from each of the magnetic migration speeds; obtaining a dispersion medium volume susceptibility (χm); and determining the affinity of the dispersoid particles (s) for the dispersion medium (m) through comparison between the dispersoid volume susceptibility (χs) and the dispersoid medium volume susceptibility (χm), wherein the dispersoid volume susceptibility (χs) being close to the dispersion medium volume susceptibility (χm) indicates that a large amount of the dispersion medium (m) is adsorbed to the surfaces of the dispersoid particles (s), which indicates strong affinity of the dispersoid particles (s) for the dispersion medium (m). obtaining a dispersoid volume susceptibility (χs) by magnetophoresis, using an analyzing apparatus including a magnetic field generating section, a measurement section, and an operation section, the obtaining including the steps of: disposing a disperse system that is the dispersion medium (m) in which the dispersoid particles (s) are dispersed in the vicinity of the magnetic field generating section; causing the magnetic filed generating section to generate a magnetic field in the disperse system, whereupon the dispersoid particles (s) will perform magnetic migration in the dispersion medium (m); causing the measurement section to measure movement (magnetic migration) of the dispersoid particles (s) in the dispersion medium (m) while the magnetic field generating section generates the magnetic field; causing the operation section to obtain magnetic migration speeds of the respective dispersoid particles (s) from a measurement result by the measurement section; and causing the operation section to obtain the dispersoid volume susceptibility (χs) from each of the magnetic migration speeds; disposing a disperse system that is the dispersion medium (m) in which the dispersoid particles (s) are dispersed in the vicinity of the magnetic field generating section; causing the magnetic filed generating section to generate a magnetic field in the disperse system, whereupon the dispersoid particles (s) will perform magnetic migration in the dispersion medium (m); causing the measurement section to measure movement (magnetic migration) of the dispersoid particles (s) in the dispersion medium (m) while the magnetic field generating section generates the magnetic field; causing the operation section to obtain magnetic migration speeds of the respective dispersoid particles (s) from a measurement result by the measurement section; and causing the operation section to obtain the dispersoid volume susceptibility (χs) from each of the magnetic migration speeds; obtaining a dispersion medium volume susceptibility (χm); and determining the affinity of the dispersoid particles (s) for the dispersion medium (m) through comparison between the dispersoid volume susceptibility (χs) and the dispersoid medium volume susceptibility (χm), wherein