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Millipore, part of the Merck group, manufactures filters for laboratory testing and manufacturing processes. Filters come in various forms, sizes, and materials, with specific pore sizes to capture unwanted particles. They are used in microbiology, chemistry, and air sampling. Millipore filters are sold to industries through laboratory supply companies worldwide.
Millipore is a manufacturer of scientific and manufacturing equipment. Part of their range are filters. These filters can be designed for laboratory testing or filtration stages during a manufacturing process. A Millipore filter can be a thin membrane, syringe filter, or contained in a capsule housing. They can be sterile or non-sterile.
The company that manufactures the filters is based in Massachusetts in the United States. Millipore is part of the Merck group and has customers all over the world. Its focus is on pharmaceuticals and biotechnology products and its products are sold to industries through laboratory supply companies.
A Millipore filter removes unwanted particles from a liquid or concentrates desired particles from the liquid. These particles can be inorganic matter such as dust or organic matter such as bacteria. In addition to the manufacturing process, the filters are used in microbiology and chemistry laboratory tests. Air can also be sampled using Millipore filters. Filters range in diameter from 13 millimeters (mm) or 0.5 inch to 293 mm (11.5 inch) and are made from materials such as nitrocellulose or polyethersulfone.
Each type has a specific pore size, which prevents particles of a certain size from passing through the filter. The pore size ranges from 0.2 micrometres (µm) up to 12 µm. A pore size of 0.45 µm captures bacteria and smaller pore sizes are used for chemical samples. The larger pore sizes are suitable for manufacturing steps that do not require the removal of microbes from the liquid.
A filterable liquid is water, used in the manufacture of a product and also used in many laboratory tests. Materials in liquid form that need to be mixed to form a product may also require filtration. The finished product can also undergo the purification process. Finally, analytical samples can be liquids or can be mixed in liquid.
Microbiology laboratory analysts typically use a Millipore filter in the form of a thin membrane for sample analysis. These thin membranes are usually sterile and used only once. They are placed in specialized equipment such as filter funnels, removed when the water is all sucked out, and tested.
Another use for a Millipore filter is in capsule or cartridge form. This is a casing that has a membrane inside. The filter may not be sterile, but it may be durable enough to survive an autoclaving process if needed. They can be used to reduce contamination of a liquid or to sterilize the liquid and are an important part of the filtration of raw materials and products in the manufacturing process.
Syringe filters reduce the possibility of chemical samples clogging equipment. Centrifugal filters are filled with proteins or genetic material. They then undergo centrifugation to spin the sample through the pores.
