Development of new migration analysis of micro-particles by using electromagnetophoretic buoyancy

在现代环境和生物科学中，迫切需要开发新的方法来分离和表征水中具有环境和生物意义的微颗粒或胶体颗粒。我们注意到电磁泳浮力是一种新的迁移力，并为微粒子在水中的新迁移方法发展了一些原理。1）毛细管电磁泳的发展当电流和磁场都垂直于毛细管中的溶液时，溶液中产生电磁泳浮力，其可以将溶液中的微粒迁移到垂直于电流的方向。它甚至在流动条件下工作。2）PN水平下微粒脱附力的测量通过控制电磁泳浮力，测量了溶液中微粒与石英毛细管壁的吸附力。测定了表面活性剂对吸附力的影响。与原子力显微镜相比，该方法的优点是可以在封闭系统中用简单的原理和装置检测pN力。3）电磁电泳色谱的发展通过在磁场作用下施加轮廓控制的交流电流通过毛细管，我们发展了一种新的颗粒色谱分离原理。

Development of new method for separation and characterization of micro-particles or colloid particles in water of environmental and biological interests are highly required in these modern environmental and biological sciences. We noticed the electromagnetophoretic buoyancy as a powerful new migration force and we developed some principles for new migration methods of micro-articles in water.1) Development of capillary electromagnetophoresisWhen both electric current and magnetic field are applied orthogonarly to the Solution in a capillary, the electromagnetophoretic buoyancy is produced in the solution, which can migrate micro-particles in the solution to the direction perpendicular to the current. It worked even under flow condition. By using this principle, surface potential of particles have been estimated.2) Measurement of desorption force of microparticles in the pN levelBy controlling the electromagnetophoretic buoyancy, the adsorption force of micro-particles with the silica capillary wall in solution was measured. Effect of surfactant on the adsorption force was also determined. The advantages of this method, in comparison with AFM, are that pN force can be detected in the closed system by rather simple principle and devise.3) Development of electromagnetophoretic chromatographyBy applying profile controlled AC current through the capillary under magnetic field, we developed new principle for a chromatographic separation of particles.