Porous Frit

Your Premier Porous Frit Choice for Your Application

Filson porous frit, also known as sintered frit or column frit, is a versatile device used in a column system for precise chromatography results. To fit the column better, Filson porous frit is always made into different types and dimensions.

Filson sintered porous media is designed for specific filtration, venting, and diffusion applications. And here, this unique porous frit is especially created and innovated for a particular use in the chromatography column, which will be explained next.

Filson provides benefits for your sample preparation device with custom-engineered porous frits and further support your business. As one of the professional porous frit manufacturers in China, Filson won’t let you down.

Filson Porous Frit

Stainless Steel Frit
Filson stainless steel frit, as its name implies, is a frit made of stainless steel, usually 316L. Also, other grades stainless steel materials are available to use for fabrication. It is the most frequently used type of column frits.
Titanium Frit
Filson titanium frit is a porous metal media applied to multiple industrial applications and commercial use. Manufactured with titanium, Filson titanium frit is highly resistant to seriously corrosive environments and fluids.
PTFE Frits
Filson PTFE frits are generally made into disc shape, so we sometimes call them PTFE disc filter. The product can be freely customized at Filson. If you need a replacement for other brands, like PTFE frits Agilent, or for a clear model or specification, like Agilent PTFE frits 5pk, Filson will design for you.
Polypropylene Frits
Filson polypropylene frits or PP frits are sintered plastic media made of ultra-high molecular polypropylene. They are mostly used for SPE column or cartridge in chromatography to bring a satisfying column efficiency.
Polyethylene Frit
Filson polyethlene frit is more familiar to us with its name ‘PE frit’. It is a porous filtration production acting as a critical component of the HPLC system and a depth filter for the concurrent physical removal of small molecules.
Borosilicate Frit
Filson borosilicate frit is also called borosilicate filter. It is sintered of borosilicate glass microfiber with many tiny pores distributed on the surface and inside the frit. The main function of it is to promote the smooth operation of a column system.
PEEK Frits
Filson PEEK frits are all carefully designed to match with your system. The device is constructed with a macromolecular compound material, offering good properties and bringing plenty of advantages to your application.
Porous Glass Frit
Porous glass frit is also named of quartz frit or porous glass filter which is formed of fine quartz glass. With powerful capability in filtration products manufacturing, Filson provides porous glass frit in highest quality and best performance.

Why Choose Filson Porous Frit

Quality product assurance: Quality raw material is the basis of the final product. Filson has stable and trusted raw material suppliers for your porous frit manufacturing. We have long term cooperation with them to guarantee the consistent quality of these frit products.

Reasonable frit pricing: Investing advanced technologies and manpower to the porous frit makes the device higher in price. Due to the differences in actual material and processing, the price varies from one manufacturer to another. However, Filson never quotes casually but offers customers the most reasonable price.

Fast and safe delivery: After placing an order, your porous frit will be put into production. Usually, we can satisfy your urgent needs within one week if there’s frit in stock. As for the custom type, maybe another two weeks are required. The products are delivered directly from our factory and all of them are well packaged to ensure fast and safe delivery.

Reliable project advisor: Filson has explored for more than 20 years in filtration field. We design and supply filters for dust removal, liquid filtration, gas purification, and more applications. And Filson porous frit is also a successful product, so we could provide useful advice on your frit project.

Your Dependable Porous Frit Manufacturer and Supplier in China

Filson porous frit sometimes equals frit filter or fritted filter. Compared to common filters, it has a similar function to some extent but looks pretty different from the usual form of a filter cartridge. This porous frit is typically designed into a disc shape to suit your column.

As mentioned above, Filson porous frit is easily found in a chromatography column system. Simply, chromatography is an analytical technique that separates the components of a mixture. And porous frit plays an important role during the process.

Column in HPLC System

Column in HPLC System

Filson porous frit will keep the packing media tight in the column rather than leaking out. Meanwhile, the frit prevents the column and even the whole system from impurities and contaminants from sample which contributes a lot to the expensive equipment in the system.

Filson porous frit is also called sintered frit because of its unique manufacturing process. Like other sintered media, sintered frit experiences a special sintering process, heating and pressing the powder material under a temperature lower than its melting point.

After sintering, Filson porous frit is endowed with good chemical resistance and remarkable corrosion resistance to be applied to all sorts of industrial and commercial use. Mostly, it is used in laboratories and has wide versatility in analytical chemistry, organic chemistry, biochemistry, and other fields.

Custom SPE Column Fritted Filter

Custom SPE Column Fritted Filter

Filson porous frit can be produced with both metal materials and polymer materials to meet different application needs. Stainless steel, titanium, Hastelloy, and nickel are the frequently used metal materials for frit.

With decades of effort, Filson has mastered the core technologies of sintered porous plastics to develop and manufacture porous frits with polymer materials to support caustic fluid separation processes. The materials include PTFE, polypropylene, polyethylene, and PEEK. You can choose from which to fully fit your requirements.

In addition to the careful design and fabrication of the porous frit itself, Filson offers a sealing ring for the product as well. By using the ring, Filson porous frits are sealed properly for no leakage of the sample passing through the column.

Porous Frit Location in a Column

Porous Frit Location in a Column

When it comes to picking the right porous frits for your application, Filson recommends you to choose the larger porosity frits for faster flow rates and choose frits with smaller porosity for applications that are sensitive to extra flow path volume.

Filson has applied our extensive porous frit products, perfect design, and custom manufacturing expertise to come up with solutions for overcoming the complex development challenges and speeding up customers’ industry prosperity.

As an essential supplier to industries active in the fight against the novel coronavirus, Filson is maintaining full operations to continuously support your business. As such, we pay more attention to the safety and disinfection of the porous frits.

Porous Frit

Porous Frit

If you happen to find a suitable porous frit for your system, then you are in the right place as Filson is always ready to be your next business partner. We have great confidence that we can provide quality products at a reasonable price which will serve your projects well.

Want more information about Filson porous frit? Call at 86 – 157 3695 8886 or directly send an email to Our representatives will reply as soon as possible after receiving from you.

SPE Column PE Filter Frit

SPE Column PE Filter Frit

Filson Porous Frit Function:

  • Allow no contaminants to pass with the narrow pore size distribution
  • Protect expensive equipment involved in the whole system
  • Assemble device more easily with simply designed component
  • The control flow rate of sample for more efficient performance
  • Eliminate issues with loose packing media in a column
  • Increase operational efficiency for higher profits
  • Eliminate poorly swept volume and improves peak symmetry

Filson Porous Frit Feature:

  • High porosity and uniform pore size distribution
  • Smooth and even sample flow introduction
  • Customizable shapes support many different application designs
  • Reduced risk of sample contamination for more accurate test results
  • No leakage, less dead volume and low back pressure
  • Good sealing and excellent chemical resistance
  • Suitable for low and high-pressure applications

Filson Porous Frit Specification ( customizable ):

  • Frit raw material: stainless steel, titanium, PTFE, polypropylene, polyethylene, glass, PEEK
  • Sealing ring material: PEEK, PCTFE, PTFE, ETFE, metal
  • Operation pressure: >5000 psi or 345 bar
  • Pore size/micron rating: 0.2 – 50μm
  • Shape: disc, cylinder, screen, plate
  • Disc diameter: 0.062’’ – 1.3’’
  • Disc thickness: 0.028’’ – 0.125’’
  • Ring OD: 0.062’’ – 1.5’’

Note: specifications listed above are for reference only, product parameters should be based on actual needs, please consult Filson for more details.

Filson Porous Frit Application:

  • Fine chemical analysis
  • Pharmaceutical analysis
  • Bioengineering/biotechnology
  • Food analysis
  • Environmental monitoring system
  • Agricultural science
  • Life science
  • Science research

People Also Ask

What is Porous Frit?

Porous frit is a sintered metal or plastic media used for chromatography systems. It is also known as column frit and sintered frit. With advanced sintering technology and optimal processing condition, porous frit is able to withstand high temperature and pressure.

There are many micro pores on the surface and inside the frit which form the ways for a sample to pass through. At the same time, these precise pores perfectly control the particle sizes of the passing sample to realize an excellent filtration purpose.

Generally, porous frits are made into various shapes and dimensions according to customer specifications. And to better fit your system, you are supposed to double-check the details when choosing your porous frit.

Porous Frit

Porous Frit

How to Choose the Right Porous Frit?

The correct porous frit is definitely beneficial to your application, to the contrary, if your frit is not matching with your system, it would not show the effector may cause great losses.

Here are some suggestions for your right porous frit selection:

  • Determine the proper material for your porous frit. For example, stainless steel is a popular material used to make frit, but it is prone to corrosion in acidic applications or when exposed to strong cleaners like bleach. At this time, you should consider changing the material.
  • Improve analytical sensitivity to eliminate interaction with metal.
  • Know your application well, like properties of the sample, packing size, working temperature, and pressure.
  • Make sure you are providing the right specifications of your porous frit. Measure your column to decide the size and dimension of the frit.
  • Filtration accuracy is important for your application because it directly influences column efficiency. Whether impurities would get in the equipment or not, it’s all determined by the pore size of frit.

If you don’t know how to choose a suitable porous frit or still have questions on frit selection, please feel free to consult Filson for a clear answer.

How to Choose the Right Porous Frit

How to Choose the Right Porous Frit

How Many Types of Porous Frit do You Supply?

Filson possesses a complete line of porous frits for analytical columns, semi-preparative and preparative columns. Next, you will see the types of our sintered porous frit supplied for customers:

  • Stainless steel frit
  • Titanium frit
  • PTFE frits
  • Polypropylene frits
  • Polyethylene frit / PE frit / porous polyethylene frit
  • Borosilicate frit / borosilicate filter
  • PEEK frits / porous PEEK frit
  • Porous glass frit / quartz frit / porous glass filter

The main difference among those porous frit is their construction material. And applications vary from the materials. Each material above offers a variety of sizes of frit and sealing materials as well as filtration accuracy.

All Filson porous frits are designed with exceptional uniform porosity and long service life. What’s more, we manufacture frits to customer specifications for specific applications.

Filson Porous Frit

Filson Porous Frit

Can a Porous Fritted Filter be Coated?


Porous frits do protect chromatography columns from contamination and clogging, but there’s the possibility that they themselves become part of the problem.

If they are corroded and pitted, the frit surface will be a perfect hiding place for stick compounds, such as proteins. Meanwhile, it becomes the source of contamination which is a threat to the costly column.

You may think stainless steel a proper material, but it is an active surface and promotes protein retention. Also, it faces the risk of corrosion. And polymer materials are commonly used to produce porous frit. However, they are all limited in surface properties and not durable enough for application.

To avoid corrosion, you can choose to change material or surface, but it’s not cost-effective. Then, you can add corrosion resistant coatings to your frits. A silicon coating applied by chemical vapor deposition ( CVD ) may solve the problem and bring improved corrosion resistance.

Where Could I Use a Porous Frit?

Porous frit is featured by uniform pore distribution, good chemical property, excellent corrosion resistance, and stable sample flow introduction. With such amazing advantages, the product is able to be used for all sorts of industrial applications.

Porous frits are usually applied to laboratories for researchers and scientists to study. Besides, many other places that need this product are shown below:

1. Life Science Field

Purify and analyze important living substances, such as amino acids, polypeptides, proteins, nucleobases, nucleosides, nucleotides, nucleic acids ( RNA, DNA ), and others.

2. Pharmaceutical Analysis

Porous frit is used in purification and quality control of synthetic drugs, the separation, preparation, and purity determination of the active components of Chinese herbal medicine, and the separation and analysis of pharmacokinetics in clinical medicine.

3. Food Analysis

Analyze food composition, especially nutritional components, such as sugers, organic acids, vitamins, proteins, amino acids, and fats.

Analyze food additives, such as preservatives, antioxidants, synthetic colors, sweeteners, and preservation chemicals.

Analyze food contaminants, such as pesticide residues.

4. Environmental Monitoring

Separate and analyze organic pollutants with large molecular weight, low volatility, and poor thermal stability, such as polycyclic aromatic hydrocarbons, phenols, polychlorinated biphenyl, phthalate esters, benzidine, anionic and non-ionic surfactants, organic pesticides, and so on.

5. Fine Chemicals Analysis

Analyze some organic compounds with higher molecular weight and higher boiling point, such as high carbon number aliphatic or aromatic alcohols, aldehydes and ketones, acids, esters, and other chemical raw materials, as well as a variety of surfactants, drugs, pesticides, dyes and other chemical products.

If your application is not mentioned, it doesn’t mean it’s not covered by the porous frit capabilities, contact Filson for more details.

Porous Frit for Your Specific Application

Porous Frit for Your Specific Application

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