介绍一个物理化学实验——粒度分析

Size Analysis——An Experiment in Physical Chemistry

粒度分析又称为沉降分析是物理化学实验之一.主要方法有重力场下的沉降和超离心沉降,实验主要介绍超离心沉降法,其原理是基于固体颗粒的离心沉降和光透射原理来测定颗粒的粒度大小及分布,它以Stokes定律和lamber-Beel定律为基础,可采用恒速或变速测定方式.用计算机控制整个测试过程,具有快速、宽域、重复性好、操作简便等特点.

Size Analysis is also called Subsidence Analysis is one of the experiments in physical chemistry. The main method is subsidence under the gravitational field and ultra centrifugal settling. This experiment mainly introduces the ultra centrifugal settling method. The principle is based on centrifugal settling and transmission of light to determine the granularity solid particle size and the distribution. It takes the Stokes law and the lamber- Beel law as the foundation with the constant speed or the speed change determination way. A computer can be used to control the entire testing process. You can find it fast , extensive, good in duplication,, easily- operated and so on.