What Type of Filter Paper Is Used in Filtration?

When looking for filters there are a lot of different options available to suit different applications. It is important to ensure you choose the best type for your work, but what do the different terms mean?

What is filter paper?

The filter paper used in laboratory is one of the common lab consumables. It is normally round in shape and made from cotton fiber and used to filter components. In chemistry, we call the separation of solids and liquids filtration. In infiltration operation, filter paper is indispensable to filter out solids and liquids.

The functional principle of the filter paper is separating the substances through them. They are normally made from fiber, which is the reason that there are keyholes on them. The keyholes resist the big solid particles and provide pathways for the liquid particles.

Quantitative filter papers

Quantitative filters are designed specifically for quantitative analysis of samples. This type of filter paper is also used to prepare samples for instrumental analysis and also for gravimetric analysis. They are available in ashless, hardened low ash and hardened ashless formats. Each format of quantitative filter paper is designed for specific quantitative analysis with specific samples and reactants.

Ashless papers are useful for critical procedures involving analytical filtering. Hardened low ash filter papers, on the other hand, work best in cases where greater chemical resistance is required and precipitates are to be retained with greater precision. Hardened ashless formats of quantitative filters have high wet strength and can be used for a wide range of critical filtration purposes.

Qualitative filter paper

Qualitative filter paper is used to determine the properties of a substance, such as its solubility or melting point. This type of filter paper is made from cotton or linen fibers and has very fine pores.

Chromatography papers

Chromatography papers are used in chromatography, a process used to separate mixtures of substances. The paper is coated with a thin layer of absorbent material, such as silica gel or alumina. The mixture to be separated is applied to the paper and the different components of the mixture travel at different rates through the absorbent material. The paper is then placed in a developing solvent, such as water or alcohol, which causes the different components of the mixture to move at different rates. This process can be used to separate substances that are very similar in structure.

Chromatography papers come in a variety of sizes and grades. Grade 00 is the coarsest and grade 12 is the finest. The size of the paper is usually given in inches. Chromatography papers are available in sheets, rolls, or precut circles.

Do you need filter papers to suit your needs

Known throughout the world for our top quality filtration products, Jielv Filter is able to provide you with the right type for your industrial or research need. If you have any more questions, please kindly contact us immediately.