Content:
Laboratory filters are designed for tests based on the process of separating solid fractions from a single sample. Depending on the application, the filter system comprises a filter media and a housing, which additionally has the function of holding the media in a specified position, which affects the characteristics and qualities of the filtering process.
Types and purpose of laboratory filters
To understand exactly where a laboratory filter can be used, it makes sense to familiarize yourself with the main types of this chemical equipment.
Among the illustrative examples can be distinguished:
- membrane (thin films with a large number of holes, the diameter of which remains at the micron level, help to qualitatively filter a liquid, or separate a solid residue from the air; to improve the quality of filtration, a preliminary laboratory filter is additionally used, the task of which is to retain the largest elements);
- centrifugal filters are a good solution for liquid filtration (thanks to the design features, it is possible to avoid rapid contamination of the surface);
- the design of the syringe version helps to filter the liquid immediately before injection, which guarantees the quality of the process.
The correct approach to filter selection requires a preliminary assessment of the material to be used and the specifics of the laboratory.
Technical data and materials of filters for laboratories
Today, laboratory filters are made of paper or cellulose. Due to the small layer sizes, an exemplary quality of solid sediment separation is achieved. The maximum size of particles that settle on the surface is at least 2.5 microns.
The borosilicate glass, which is also used to create the replacement filter, can withstand heating to temperatures of more than 550 degrees Celsius. As a consequence, a quality filtering process is guaranteed, especially if the system needs to ignite the material for specific analysis.
Also, polymeric materials are often used for the manufacture of laboratory equipment. Low weight and the ability to withstand even significant mechanical stress are additional advantages.
Criteria for filter selection depending on the specifics of laboratory tests
For the right choice of materials that help in quality filtration of any raw material, there is a need to understand the specifics of use. Ideally, it should be based on the characteristics of the material to be handled. For example: liquid or gas. Today there are universal examples, but in quality they are worse than specialized ones. Plus: experts advise to understand the design features of the case. Convenient use is the basis for maintaining the correct technology, on which the final result depends.
Finally, when choosing laboratory filters, you need to familiarize yourself with the rules for their care. The easier this process is, the longer the equipment will last.
