首页> 外国专利> METHOD TO MEASURE PARTICLE MOBILITY IN SOLUTION WITH SCATTERED AND UNSCATTERED LIGHT

METHOD TO MEASURE PARTICLE MOBILITY IN SOLUTION WITH SCATTERED AND UNSCATTERED LIGHT

机译:用散射光和非散射光测量溶液中粒子运动的方法

摘要

A method is disclosed for measurement of the electrophoretic mobility of particles in solution. A sample is placed in a cell containing two electrodes that apply an alternating electric field. A monochromatic light beam passes through the sample. Light scattered by the particles, along with the unscattered beam, is collected and collimated as it exits the cell. This beam is combined in free space with a phase modulated reference beam. The interference forms a frequency modulated speckle pattern, which is detected by a photodetector array. Each array element collects a narrow range of well-defined scattering angles. The signal from each is demodulated to provide a first-principle measurement of the electrophoretic mobility of the scattering particles. Each detector element provides a simultaneous independent measurement increasing the amount of information which results in increased sensitivity, extending mobility measurements to particles below one nanometer while reducing the required concentration and electric field.
机译:公开了一种用于测量溶液中颗粒的电泳迁移率的方法。将样品放在包含两个施加交变电场的电极的电池中。单色光束穿过样品。粒子散射的光以及未散射的光束在离开细胞时会被收集和准直。该光束在自由空间中与相位调制参考光束合并。干涉形成调频斑点图案,该图案由光电检测器阵列检测。每个阵列元素收集范围狭窄的明确定义的散射角。来自每个信号的信号被解调以提供散射粒子电泳迁移率的第一原理测量。每个检测器元件提供同时独立的测量,从而增加了信息量,从而增加了灵敏度,将迁移率测量范围扩展至1纳米以下的颗粒,同时降低了所需的浓度和电场。

著录项

  • 公开/公告号US2013182254A1

    专利类型

  • 公开/公告日2013-07-18

    原文格式PDF

  • 申请/专利权人 WYATT TECHNOLOGY CORPORATION;

    申请/专利号US201313783160

  • 发明设计人 STEVEN P. TRAINOFF;HUNG-TE HSIEH;

    申请日2013-03-01

  • 分类号G01N27/447;

  • 国家 US

  • 入库时间 2022-08-21 16:51:49

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