Introduction and Application Fields of Chemical Filter Paper
Filter paper is the general term for ultra-thin filter materials. Chemical filter paper can be made of various fiber materials, including wood pulp paper (made of plant fibers), glass fiber paper (made of ultra-fine glass fiber), and PP paper ( Made of ultra-fine polypropylene material), and so on. Non-woven fabrics are originally formed by spinning a chemical fiber material, which is different from the principle of textile molding, so it is called non-woven fabric (also called non-woven fabric, non-woven fabric). It was first used as clothing material and later borrowed as a filter material.
The relationship between chemical filter paper and the non-woven fabric is PP paper, which is a kind of chemical filter paper. Originally, non-woven fabrics do not have to be called a kind of chemical filter paper. In international trade, the concept of “cloth” belongs to textiles and is restricted in import and export procedures, so it is called a kind of “filter paper”.
As an effective filter medium, the filter paper is widely used in various fields, such as industry, food, medical treatment, hygiene, environmental protection, and so on. There is mainly grinder filter paper for the grinder processing industry, automotive processing industry filter paper, automotive filter paper, air filter paper, grinding fluid filter paper, emulsion filter paper, transformer filter paper, edible frying oil filter paper.
Chemical filter paper filtration is actually chromatography:
Paper chromatography uses chemical filter paper as an inert support. Chemical filter paper fiber has a strong affinity with water and can absorb about 22% of water, and 6~7% of the water is combined with the hydroxyl group of cellulose in the form of the hydrogen bond, which is difficult to remove under normal conditions. The affinity of chemical filter paper fibers with organic solvents is very weak, so general paper chromatography actually uses the bound water of the chemical filter paper fibers as the stationary phase and the organic solvent as the mobile phase.
When the mobile phase passes through the sample along with the paper, the solute on the sample point is the water and the organic phase are continuously distributed. Part of the sample moves with the mobile phase and enters the solute-free zone. At this time, it is redistributed, and part of the solute enters the stationary phase (water phase) from the mobile phase. With the continuous movement of the mobile phase, various parts are continuously distributed according to their respective distribution coefficients and move along the mobile phase, so that substances can be separated and purified, and water and alcohol can be filtered.
Laboratory chemical filter paper is a kind of essential need in the processing of separation and purification. Throughout the different stages of chromatography, As the must-have products for lab and industrial process, the chemical filter paper can be used in solvent filtering, cellulose analysis, and other applications that involves separation and purification.
The purification products but also come in different variants for different purposes. Hawach provides the complete range of different types of chemical filter paper with varying capacities, different filtration levels. And all the products which are made for specific samples in every particular application will highly beneficial the whole chromatographic process.