Most filter paper is made of cotton fibers and is made in different ways for different purposes. Because it’s made of fiber, As a result, its surface has numerous small holes through which liquid particles can pass, while larger solid particles cannot. This property allows the mixing of liquid and solid substances to separate. Ordinary paper can only absorb 23% of the water, can not achieve the filtering effect. Paper, on the other hand, is a thin sheet made of plant fibers.
The specific filter paper information is as follows:
Filter paper filtration is actually chromatography: paper chromatography is based on filter paper as support. Filter paper fiber and water have a strong affinity, can absorb. About 22 percent of the water and 6 to 7 percent of it is hydrogen-bonded to the hydroxide group of cellulose, which is difficult to remove under normal conditions.
Filter paper filtration is actually chromatography: paper chromatography is based on filter paper as support. Filter paper fiber and water have a strong affinity, can absorb. About 22 percent of the water and 6 to 7 percent of it is hydrogen-bonded to the hydroxide group of cellulose, which is difficult to remove under normal conditions.
And filter paper fiber and organic solvent affinity is very weak, so the general paper chromatography, in fact, with the combined water of filter paper fiber as the stationary phase, with organic solvent as mobile phase, when the flow down paper after sample, the sample point between solute in water and organic phase in the continuous distribution, part of the sample with the mobile phase, into the area of the solute, at this time and redistribution, part of the solute from the mobile phase to stationary phase (water). With the continuous movement of the mobile phase, the different parts are continuously distributed according to their respective distribution coefficients and move along the mobile phase, so that the substances are separated and purified.
Action principle
Most filter paper is made of cotton fibers and is made in different ways for different purposes. Because it is made of fiber, the surface has numerous holes through which liquid particles can pass, while larger solid particles cannot. This property allows the mixing of liquid and solid substances to separate.
Most filter paper is made of cotton fibers and is made in different ways for different purposes. Because it is made of fiber, the surface has numerous holes through which liquid particles can pass, while larger solid particles cannot. This property allows the mixing of liquid and solid substances to separate.
Whatman filter paper is a cellulose paper made by using a high percentage of alpha-cellulose. Its contents are a sign of its consistency and high quality as alpha cellulose is considered the most stable form of cellulose. Not only this, it has the highest degree of polymerization.
回复删除Whatman filter paper is available in a range of wet strengthened qualitative filters. They are known for containing a small quantity of chemically stable resin which is responsible for giving high wet strength. These are also known for not introducing any impurities into the filtrate which may be significant.