The aperture of standard filter paper

The aperture of a standard filter paper refers to the size of the holes on the filter paper. When manufacturing standard filter paper, a standard pore size sieve is usually used to screen cellulose fibers to ensure consistency and accuracy of pore size.

The aperture of standard filter paper is usually measured in units μ Represented by m (micrometers). Different pore sizes are suitable for different application scenarios, for example, smaller pore sizes are suitable for filtering small particles, while larger pore sizes are suitable for filtering larger particles.

Typically, the pore size range of standard filter paper is 0.2 μ M to 50 μ Between m. Among them, 0.2 μ M's filter paper is suitable for filtering microorganisms, viruses, bacteria, etc., while 50 μ M's filter paper is suitable for filtering large particles of sediment, suspended solids, etc.

In addition to pore size, the porosity of standard filter paper is also an important parameter. Porosity refers to the percentage of voids in the total volume of filter paper, and is commonly used to evaluate the filtration efficiency of filter paper. The higher the porosity, the lower the filtration efficiency of the filter paper, and vice versa.

In short, selecting the correct pore size and porosity of standard filter paper can help us filter the required substances more effectively, thereby improving work efficiency and accuracy of results.