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HIGH SCHOOL

Chemistry

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Analytical Chemistry

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Introduction to Separation Methods

Filtration Setup and Filtrate Collection

Description

Filtration separates a solid from a liquid by passing a suspension through a porous medium. The solid stays on the filter, and the liquid, called the filtrate, passes through. This makes filtration a physical separation process, not a chemical change.

The filtering medium is chosen for the purpos...

Transcript

过滤是利用过滤介质将固体与流体进行物理分离的过程。

滤膜介质的选择取决于过滤的目的、固体量以及颗粒大小。

一般来说,过滤效率随着颗粒尺寸的增大而提高。

在简单过滤中,先让沉淀物沉降,然后将上清液沿玻璃棒倾入装有滤纸的漏斗中。

然后使用橡胶刮刀将沉淀物转移至滤纸上。

当需要称重时,可将无灰滤纸点燃以回收沉淀物。

或者,可使用带有侧臂的布氏烧瓶,其上固定一个烧结玻璃漏斗,侧臂可连接真空泵,用于收集沉淀物。

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