Precautions For Filter Paper Use

Lab filtration paper generally has more residual ash content, which is only used for general qualitative analysis and filtration solution of precipitation or suspended matter, not for quality analysis.

In terms of type and specification, qualitative lab filter paper and quantitative analysis filter paper are basically the same. However, it is not necessary to use quantitative and qualitative analysis of filter paper to filter precipitation in cartons containing filter paper.

(1) Natural filtration is generally used to separate liquids from solids by utilizing the ability of filter paper and solid particles to be intercepted.
(2) Because the mechanical strength and toughness of filter paper are less than that of suction filter, if the filtering speed must be accelerated, in order to prevent the failure of filtration, two or three layers of filter paper can be stacked in the funnel according to the suction force when air pump filters. When vacuum suction filters are used, a layer of dense filter cloth should be padded first, and then placed on top.
(3) It is better not to filter hot concentrated sulfuric acid or nitric acid solution.

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What problems should be precautions for filtration to when using qualitative filter paper?

Qualitative filter paper is a kind of paper with good filtering performance. Qualitative filter paper is loose and has a strong liquid absorption performance. Analytical laboratories often use filter paper as a filter medium to separate the solution from the solid.

Due to the characteristics of qualitative filter paper, qualitative filter paper is used in some filtration in laboratories, hospitals, factories, and other industries. It is also because of this that the output of qualitative filter paper has risen linearly.

Precautions for filtration in the filtering process of qualitative filter paper. Under normal circumstances, qualitative filter paper will not be used for filtering at high temperatures. This temperature has a limit as long as it does not exceed it. Don’t filter hot concentrated sulfuric acid or nitric acid. The hot acidity of the solution can destroy the filtering effect of the qualitative filter paper.

Natural filtration is generally used, and the filter paper body and the ability to trap solid particles are used to separate the liquid from the solid; With the use of qualitative filter paper in the filter machine, the mechanical strength and toughness of the filter paper are less than the use of suction filtration. If the filtration speed must be accelerated, in order to prevent the filtration failure caused by the filtration, the air pump can be filtered according to the suction force. Size: stack 2 to 3 layers of filter paper in the funnel. When vacuum filtration is used, it is leaking. Put a layer of dense filter cloth first, and then put filter paper on it to filter;