Syringe filters - which one do I need? Camlab

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Syringe filters are used to help filter samples containing solid particles, into sample tubes for analysis. These work by using a membrane with a particular pore size to catch any solids within the samples. The Camlab choice coloured filters are available with two different pore sizes, and in three different membrane sizes. Some of these filters come with pre-filters to catch any large particles to prevent blockage of the main filter membrane.

Cellulose acetate (CA) syringe filters

The Camlab Choice cellulose acetate filters are produced with modified cellulose acetate membranes and are naturally hydrophilic. This means the filters have a high filtration efficiency and present a weak fixation on proteins. CA filters are recommended for:

Biological samples - filtration of proteins or enzymes cultures
Aqueous samples
Cells

These Camlab Choice filters are orange for easy identification with a pH compatibility range of 3-7, they are available in sterile and non-sterile packs. These filters are available with two different pore sizes, - 0.22 and 0.45µm, and are available in three different syringe filter sizes - 13, 25 and 33mm

The CA filters with a 0.22µm pore size have a water flow of 23ml/min/cm2 and a bubble point of 340kPa. The 0.45µm pore size filters have a water flow of 46ml/min/cm2 and a bubble point of 220kPa.

Orange cellulose acetate syringe filters

Yellow nylon syringe filters

Nylon (NYL) filters

The Camlab Choice nylon (NYL) filters are naturally hydrophilic and are made from a nylon membrane. These filters are mainly used for aqueous solutions as they have a strong chemical resistance to alkaline samples. This means they can be used for alkaline or organic filtration of HPLC samples.

These Camlab Choice filters are yellow with a pH compatibility range of 3-14, they are available in sterile and non-sterile packs. These filters are available with two different pore sizes, - 0.22 and 0.45µm, and are available in three different syringe filter sizes - 13, 25 and 33mm

The NYL filters with a 0.22µm pore size have a water flow of 23ml/min/cm² and a bubble point of 340kPa. The 0.45µm pore size filters have a water flow of 46ml/min/cm² and a bubble point of 220kPa.

Mixed cellulose esters (MCE) filters

The Camlab choice mixed cellulose ester (MCE) filters are made with cellulose acetate and cellulose nitrate fibres. These filters are naturally hydrophilic, mechanically stable and have a high loading capacity. MCE filters are recommended for:

Biological fluids clarification
Enzyme or aqueous solutions filtration

These Camlab Choice filters are green and have a chemical compatibility of pH 4-8, they are available in sterile or non-sterile packs. These filters are available with two different pore sizes, - 0.22 and 0.45µm, and are available in three different syringe filter sizes - 13, 25 and 33mm

The MCE filters with a 0.22µm pore size have a water flow of 8.5ml/min/cm² and a bubble point of 350kPa. The 0.45µm pore size filters have a water flow of 22ml/min/cm² and a bubble point of 230kPa.

Green mixed cellulose ester syringe filters

Glass microfibre (FV) syringe filters

The Camlab Choice glass microfibre filters are made from glass microfibre filter. These filters are hydrophilic and are used for viscous solutions or for filtration of cells media before sterilisation. This filter has a high resistance to organic solvents and acids (apart from HF). It is better to operate a pre-filtration using a glass microfibre syringe filter. Other recommended uses are:

Biological samples
Aqueous samples
Filtration of proteins or enzymes

These filters are clear and have a chemical compatibility of pH 3-7. There are not any sterile pack for these filters. The FV filters have a pore size of 1-2µm and are available in three sizes – 13, 25, 33mm

Purple polyether sulfone syringe filters

Polyether sulfone (PES) filters

The Camlab Choice polyether sulfone filters have an asymmetrical pore structure which provides an excellent loading capacity and high flow rate. This filter is naturally hydrophilic and has a good resistance to chemical solutions. PES filters are recommended for:

Biological samples
Preparation of protein samples
Ultra-fast filtration of tissue culture media

Camlab Choice PES filters are purple with a chemical compatibility of pH 4-8. These filters come in sterile and non-sterile packs. These filters are available in two pore sizes – 0.22 and 0.45µm, and are available in three different syringe filter sizes – 13, 25 and 33mm

The PES filters with a 0.22µm pore size have a water flow of 21ml/min/cm2 and a bubble point of 340kPa. The 0.45µm pore size filters have a water flow of 36ml/min/cm2 and a bubble point of 220kPa. These are also available with a glass microfibre pre-filter which is available in both pore sizes.

Polypropylene (PP) filters

The Camlab Choice polypropylene filters are naturally hydrophobic with strong chemical resistance to organic solvents and acids. These filters are recommended for:

HPLC with low solids loading
Cell culture
Refractometry
UV/Vis sample

Camlab Choice PP filters are white with a chemical compatibility of pH 1-14 and are available in sterile and non-sterile packs. These filters are available in two pore sizes – 0.22 and 0.45µm, and are available in three different syringe filter sizes – 13, 25 and 33mm

The PP filters with a 0.22µm pore size have a water flow of 23ml/min/cm2 and a bubble point of 340kPa. The 0.45µm pore size filters have a water flow of 46ml/min/cm2 and a bubble point of 220kPa. These are also available with a glass microfibre pre-filter which is available in both pore sizes.

Polytetra fluorethylene (PTFE) filters

Camlab Choice PTFE filters are naturally hydrophobic with chemical resistance to organic solvents and acids. These filters are recommended for:

HPLCAir and gas filtration
Chemically aggressive or very acid samples
Clarification and sterilisation of organic solutions

Camlab Choice PTFE filters are red with a chemical compatibility of pH 1-14 and are available in sterile and non-sterile packs. These filters are available in two pore sizes – 0.22 and 0.45µm, and are available in three different syringe filter sizes – 13, 25 and 33mm.

The PTFE filters with a 0.22µm pore size has bubble point of 1.2kPa. The 0.45µm pore size filters has a bubble point of 0.8kPa. These are also available with a glass microfibre pre-filter which is available in both pore sizes.

Red polytetra fluorethylene syringe filters

Blue regenerated cellulose syringe filter

Regenerated cellulose (RC) filters

Camlab Choice RC filters are hydrophobic and show high chemical resistance to all solvents with a high flow rate. These filters also have a high particle extracting capacity. These filters are recommended for:

Solvent filtration
Organic samples
Aqueous solutions

Camlab Choice RC filters are blue with a chemical compatibility of pH 3-12 and are available in sterile and non-sterile packs. These filters are available in two pore sizes – 0.22 and 0.45µm, and are available in three different syringe filter sizes – 13, 25 and 33mm.

The RC filters with a 0.22µm pore size has bubble point of 19-22psi. The 0.45µm pore size filters has a bubble point of 10-15psi.

Polyvinylidene (PVDF) filters

Camlab Choice PVDF filters are naturally hydrophobic and are chemically very resistant to most solvents. These filters are recommended for air or gas filtration

Camlab Choice PVDF filters are brown with a chemical compatibility of pH 1-14 and are available in sterile and non-sterile packs. These filters are available in two pore sizes – 0.22 and 0.45µm, and are available in three different syringe filter sizes – 13, 25 and 33mm.

The PVDF filters with a 0.22µm pore size have a water flow of 9-12ml/min/cm2 and a bubble point of 1.2kPa. The 0.45µm pore size filters have a water flow of 17-23ml/min/cm2 and a bubble point of 0.8kPa. These are also available with a glass microfibre pre-filter which is available in both pore sizes.

All images are courtesy of FiltraTech