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Regenerated Cellulose (RC)
Regenerated Cellulose is a hydrophilic, solvent resistant, low protein binding membrane. R
C membrane is ideal for removing particulates from HPLC samples, prior to injection. This membrane is compatible with all HPLC solvents, and can be utilized for particle removal and de-gassing of these solvents. RC membranes are also compatible with aqueous solutions in the pH range of 3 to 12. Extractable with water are less than 1%. Regenerated Cellulose membranes exhibit low non-specific adsorption, thus they are well suited for filtration of biological samples, where maximum recovery of protein is important. When used with a glass pre filter in the same housing, this membrane is ideal for filtration of tissue culture media, as well as general biological sample filtration. RC membranes can be sterilized by gamma radiation, autoclaving, ethylene oxide, or dry heat.
Cellulose Esters (MCE)
Cellulose Esters is a very low protein binding membrane that is ideal for aqueous based samples. MCE membranes are an excellent choice when maximum protein recovery in the filtrate is critical. Laboratory studies show that MCE membranes bind less protein than PVDF or Polysulfone membranes. When used with a glass pre-filter in the same housing, these membranes are ideal for filtration of tissue culture media and sensitive biological samples. The pre-filter increases yield.
Nylon and nylon low Ext.
New low extractable Nylon membranes combine the solvent resistance of Nylon with a membrane that exhibits very low extractable. Nylon is commonly used for general laboratory filtration, and filtration of HPLC samples prior to injection. Nylon binds protein, and should not be used when maximum protein recovery is important. Nylon can be sterilized by autoclaving at 120°C, gamma radiation, or ethylene oxide.
Polypropylene membrane is a hydrophilic membrane that exhibits a wide range of chemical compatibility to organic solvents. PP membranes are a good choice for filtration of HPLC samples when performing protein analysis by chromatography. In addition to being highly solvent resistant, these membranes are low non-specific adsorbing membranes, which results in maximum protein recovery for critical analysis. PP membranes are also well suited for biological sample filtration.
Glass Fiber membranes are commonly used as pre filters in many filtration devices. Specialized glass membranes are used for DNA recovery and clean-up.
PVDF (polyvinylidene fluoride) is a hydrophobic, solvent resistant membrane that exhibits low levels of UV absorbing extractable. PVDF is useful for HPLC sample filtration, as well as general biological filtration. PVDF is considered to be one of the low protein binding membranes.
PTFE membrane is hydrophobic, and chemically resistant to all solvents, acids and bases. PTFE, membrane does not impart any extractables to the filtrate. PTFE is an ideal membrane for transducer protectors, since it blocks water vapor. PTFE is ideal for filtering and de-gassing chromatography solvents.