Patent ID: 7642512
Filing Date: 2010-01-05
Classification: G01N,H01J

Abstract:
1. A mass spectrometry, comprising the steps of: generating a magnetic field gradient in a space, applying a magnetic force from said magnetic field gradient onto said microparticle, and measuring a velocity and an acceleration of said microparticle due to said magnetic force, thereby measuring a mass of said microparticle based on said velocity and said acceleration of said microparticle which are measured, wherein said mass of said microparticle is derived from the following equation: (v(t): a velocity of said microparticle at a time t, v 0 : a terminal velocity of said microparticle, χ: a volume magnetic susceptibility of said microparticle, r: a radius of said microparticle, η: a viscosity of said space, μ 0 : a vacuum permeability, B: a magnetic flux density in said space, B(dB/dx): a strength of said magnetic field gradient, m: said mass of said microparticle, α(t): an acceleration of said microparticle at a time t).