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”.

quantitative-filter-papers-bio-43As 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, also known as qualitative filter paper, is a type of laboratory filter paper designed for general-purpose filtration. It is made from high-quality cellulose fibers and is treated to ensure high wet strength and chemical resistance. This type of filter paper is commonly used in various laboratory applications where filtration of chemicals, particulates, and precipitates is required.

Application Fields of Chemical Filter Paper:

  1. Qualitative Analysis:
    • Chemical filter paper is widely used in qualitative chemical analysis techniques, such as gravimetric analysis and colorimetric analysis. It allows for the separation of solid particles from liquid solutions.
  2. Sample Clarification:
    • In analytical chemistry, chemical filter paper is used to clarify samples by removing impurities or solid particles. This is crucial for obtaining accurate and reliable analytical results.
  3. Precipitate Separation:
    • It is commonly employed in processes where a solid precipitate needs to be separated from a liquid solution. This is often done to isolate a specific chemical compound or element.
  4. Filtration of Suspensions:
    • Chemical filter paper is used to filter suspensions, which are mixtures of solid particles dispersed in a liquid. It effectively captures the solid particles, allowing for the collection of a clarified liquid.
  5. Routine Laboratory Filtration:
    • It is a fundamental tool in routine laboratory work, used for tasks like removing particulates from solvents, filtering out unwanted materials, and preparing samples for further analysis.
  6. Education and Training:
    • Chemical filter paper is a staple in educational laboratories, where it is used to teach students fundamental principles of filtration and separation techniques.
  7. Food and Beverage Industry:
    • It finds applications in quality control and analysis in the food and beverage industry. For example, it may be used to filter out solid impurities from food samples.
  8. Environmental Analysis:
    • Chemical filter paper is used in environmental laboratories for tasks such as filtering water samples to analyze pollutants, sediments, or particulate matter.
  9. Pharmaceutical Testing:
    • In pharmaceutical laboratories, it is used for various filtration processes, including sample preparation, clarification of solutions, and isolation of active pharmaceutical ingredients.
  10. Medical Research:
    • It is utilized in medical research for tasks like filtering biological samples, isolating cells or particles, and preparing samples for analysis.
  11. Quality Control in Industrial Processes:
    • Industries, such as chemical manufacturing, petrochemicals, and pharmaceuticals, use chemical filter paper for quality control procedures that involve separating solids from liquid solutions.

Overall, chemical filter paper plays a vital role in a wide range of scientific and industrial applications, contributing to accurate analyses, quality control, and research in various fields. Its high wet strength and chemical resistance make it a versatile tool for filtration in laboratory settings.

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.