Air filter paper is a kind of filter medium, which has been widely used in various fields. According to the different types of fiber that make up the filter paper, the performance  use of the filter paper are also different. There are ordinary filter paper for general occasions, glass fiber filter paper for high temperature,  ultra-clean polypropylene filter paper.

Do you know what should be paid attention to when filter paper is used for filtration  sedimentation? Let's make the following analysis:

The type  specification of qualitative analysis filter paper is basically the same as that of quantitative analysis filter paper, indicating fast, medium  slow speed, but printing fast, medium  slow words. However, when quantitative  qualitative analysis of filter paper is  used on the box containing filter paper to filter sediment, attention should be paid to:

① Generally, natural filtration is used to separate liquid  solid by using the filter paper body  the ability to intercept solid particles;

② As the mechanical strength  toughness of the filter paper are relatively low, the suction filtration method should be used as less as possible. For example, the filtration speed. In order to prevent filtration failure due to filtration, during the air pump filtration, 2-3 layers of filter paper can be stacked in the funnel according to the size of the suction force. When using vacuum suction filtration, a layer of dense filter cloth should be placed on the leakage,  then the filter paper should be placed on the top for filtration;

③ The air filter paper is quite good at filtering hot nitric acid solution.