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What is the difference between conical and fluted filter paper?

Filter papers are used for the separation of solids from the liquid component of a solution. This is a technique of filtration that uses gravity to draw the liquid through the filter paper. The other is the vacuum or suction filtration technique.


There are two main methods of using the gravity filtration technique. The first method is the conical filter method where the filter paper is folded into a cone and inserted into a funnel. One disadvantage of this method is that the solvent may form a seal between the funnel and the filter paper and prevent displaced air from escaping. This could slow down the filtration process considerably and if the solvent seal is total, it may completely stop the filtration process.


The second method is the fluted filter method where the paper is folded into the fluted filter. The main advantage of this method is that it increases the speed of filtration by letting air enter the flask along its sides to bring about pressure equalization. In addition, the fluted filter paper has a larger surface area through which the solvent can seep. Both factors make the use of fluted filter paper a faster method of gravity filtration than conical filter paper.

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