A syringe filter is a membrane-based product that helps remove certain impurities, including bacterial contamination from liquid samples. Membrane Filters use for efficient and quick filtering, sterilization, and cleaning the equipment in many laboratories. A syringe filter is a single-used cartridge filter connected to the end of the syringe for service. These may have a Luer lock association, though not everywhere. The use of the cursor is selected when the window can mount on top of a syringe filter. The syringe filter usually consists of a layer of plastic covering that functions as a filter. But sometimes, it may be challenging to choose an appropriate filter for use. Let's discuss how you select the right syringe filter for your applications.
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| Membrane Filters |
Match Pore Size
Many types of syringe filters come with a preference for hole dimensions. Confirming that the hole size is right for your application is essential to ensure that it performs the way you want it. Below are some of the most common hole sizes encountered in your range and examples of standard applications.
0.1μm used for solution sterilization and mycoplasma removal.
0.22 Micron Filter is used for solution sterilization bacterial reduction.
0.45μm used for general filtration and particle removal.
>0.45μm is used typically used for pre-filtration.
Select the most Suitable Filter Material
The syringe filters are made of a membrane filter containing a plastic housing (usually polypropylene). Each layer has several important physical and chemical components that make it appropriate for a particular type of system.
Filter Diameter:
The diameter of the syringe filter depends on the importance of the sample to be filtered. If the volume of the liquid sample is high, the filter should be comprehensive. The syringe filters are obtainable in different diameters with 4mm, 13mm, 17mm, 20mm, 25mm, 30mm, and 33mm. For smaller volume samples (approximately 1 ml), filters with a diameter of 4mm operated, while for larger volumes (around 100 ml), filters with a diameter of 30mm utilize.
Wettability of the Membrane:
It is essential to evaluate whether the membrane is unaffectedly hydrophilic or hydrophobic. Hydrophilic filters obstruct some molecules and let the water reach the membrane. Filters constructed of polyethersulfone (PES), nylon, Cellulose Acetate (CA), Regenerated Cellulose (RC), Anopore, Glass Fiber, and polypropylene are hydrophilic.
Sometimes hydrophilic filters are not sufficient to filter particular acidic samples. If so, hydrophobic filters are pre-installed during the display procedure to make them hydrophilic. Hydrophilic Polytetrafluoroethylene and Hydrophilic PVDF (Polyvinylidene Fluoride) hydrophobic filters transformed to hydrophilic filters.
Final Words
Selecting an appropriate syringe filter is an essential part of any laboratory application. The accurate filter improves the accuracy of the observed results. If you choose the wrong filter, it can supply impurity, undesirable particles extractable from the filter into the test model, conducting incorrect results and findings. So when you select your 0.22-micron filter and 0.45 Micron Filter, remember these above-discussed things to obtain the best results.
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