  
Only Spectrum offers Biotech grade dialysis membrane for those critical
applications requiring stringent MWCO's and membrane purity.
Since these synthetic membranes are made using a process free of
heavy metal contaminants and sulfides, they are ultra-pure and require
no cleaning or pre-treatment. Simply rinse with DI water, apply Universal
Closures and load sample! Spectrum offers 3 different Biotech
grade membrane types to meet the different demands of laboratory
dialysis applications: Cellulose Ester (CE), Regenerated Cellulose (RC)
and Polyvinylidene Difluoride (PVDF).
ADVANTAGES OF BIOTECH MEMBRANES
- Ultrapure for critical separations
- Rigidly controlled porosity
- 3 types available for different applications (CE, RC & PVDF)
Biologically inert & ultra-pure, Biotech CE Membrane offers the largest
selection of concise pore ratings (9 MWCO's) and sizes for isolating
ionic species and macromolecular purifications. Of the 3 types,
Biotech CE is the most sensitive to harsh conditions and solvents. In
general, CE membrane will tolerate weak or dilute acids & bases as
well as mild alcohols with only a slight change to the MWCO. Exposure
to organic solvents will damage the CE membranes. Biotech
CE should only be used with pH 2-9 & temp 4-37 °C.
Biotech CE is also available in Ready-to-Use Dialysis Devices.
Biotech RC Membrane is crafted from a regeneration process that
yields improved physical tolerances and chemical compatibilities with
the same high purity and rigidly controlled MWCO's as Biotech CE.
RC Membrane can be used with concentrated-weak acids & bases,
dilute-strong acids & bases, most alcohols and some mild or dilute organic
solvents. Exposure to strong polar or organic solvents may
damage RC membranes. Biotech RC can be used with pH 2-12 &
temp 4-60 °C. Biotech RC is available in dialysis tubing with 5 concise
MWCO's.
Hydrophobic, inert and non-reactive, Biotech PVDF Membrane is a
revolutionary advancement in Laboratory Dialysis, offering the best tolerance
of extreme temperatures (130 °C) and solvent conditions. Only
Biotech PVDF can withstand exposure to most acids & bases (excluding
Nitric acid) and most organic solvents (excluding DMF).
PVDF membrane also possesses the unique ability to be autoclaved
or heat-sealed for sample encapsulation. Ultra-pure Biotech PVDF
Tubing is available in 2 MWCO's.
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