申请人:Ross J. David
公开号:US20050258040A1
公开(公告)日:2005-11-24
A method and device are provided for concentrating and separating materials in fluids within a fluidic device having a fluid conduit such as a channel or capillary. The concentration is achieved by balancing the electrophoretic velocity of a material against the bulk flow of fluid in the presence of a temperature gradient. An additive is added to the fluid which interacts with the material and which modifies the normal electrophoretic mobility of the material. Using an appropriate fluid, the temperature gradient can generate a corresponding gradient in the electrophoretic velocity so that the electrophoretic and bulk velocities sum to zero at a unique position along the conduit and the material will be focused at that position. The method and device may be adapted for use with a variety of materials including fluorescent dyes, amino acids, proteins, DNA and to concentrate a dilute material.
本发明提供了一种方法和装置,用于在具有通道或毛细管等流体导管的流体装置内浓缩和分离流体中的材料。在存在温度梯度的情况下,通过平衡材料的电泳速度与流体的体积流来实现浓缩。在流体中加入添加剂,添加剂与材料相互作用,改变材料的正常电泳流动性。使用适当的流体,温度梯度可在电泳速度中产生相应的梯度,从而使电泳速度和体积速度之和在导管的某一特定位置为零,材料将在该位置聚焦。该方法和装置可用于各种材料,包括荧光染料、氨基酸、蛋白质、DNA 和浓缩稀释材料。