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Thumbnail Filmstrip of Cellulose Nitrate Membrane Circle, Plain, 0.2um Pore Size, 47mm, 100/Pk Images
Cellulose Nitrate (CN) Membrane Filters - 7182-004
The Whatman 7182-004 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. A uniform Cellulose Nitrate (CN) matrix maintains its rated 0.2 cutoff under the pressures and flow conditions encountered during routine laboratory filtration. In turn, controlled production conditions produce membranes with documented pore size distribution and thickness tolerances, supporting method reproducibility across multiple filter lots.
Material Specifications
- Cellulose nitrate membranes feature a narrow pore size distribution and low extractable levels, providing the controlled retention characteristics required for gravimetric and particulate analysis.
- Autoclavable at 121°C without loss of integrity, cellulose nitrate membranes maintain their rated pore structure and dimensional stability through repeated sterilization cycles.
- Dissolves completely in specific organic solvents, enabling full recovery of captured particles from the membrane surface for downstream gravimetric, chemical, or spectroscopic analysis.
- High protein binding capacity makes cellulose nitrate the preferred membrane for Western blotting, dot blotting, and nucleic acid immobilization techniques that rely on efficient surface adsorption.
- Bulk format reduces per-unit packaging waste and cost, appropriate for routine particulate removal and clarification where aseptic handling is not specified.
Maintaining accreditation under ISO 17025 or similar quality frameworks requires documented traceability at every step — the specification compliance of each membrane lot supports your ongoing audit readiness. For applications like these, low extractable levels in cellulose nitrate membranes mean your blank measurements stay minimal, giving you the confidence that weight changes in gravimetric analysis reflect actual sample content rather than membrane artifacts. Take control of your sample preparation variables and ensure that your data reflects the true nature of your work, rather than the quality of your consumables.
For more information about chemical compatibility, please review our Chemical Compatibility Chart.
- Bubble Point (psi)
- 53.6psi
- Color
- white
- Diameter
- 47mm
- Extractables
- low
- Filtration Area
- 17.35cm²
- Flow Rate
- 20ml (Water)
- Grid (Yes/No)
- No
- Material
- Cellulose Nitrate (CN)
- Maximum Operating Pressure
- Holder-dependent
- Maximum Operating Temperature (°C)
- 80°C
- Membrane Thickness (µm)
- 105–140um
- Pack Count
- 100
- pH Range
- 4-9
- Pore Size (µm)
- 0.2
- Sterility
- Nonsterile
- Sterilization
- Autoclavable at 121°C for 30 mins
- Support Material
- None
- Wettability
- Hydrophilic
- Environmental Compliance - Documented retention characteristics at standard pore ratings support reproducibility in regulated testing programs.
- Bioburden Monitoring - Surface retention keeps captured organisms accessible for direct incubation and enumeration without transfer steps.
- Biochemical Assays - High protein-binding capacity effectively immobilizes macromolecules, supporting lateral flow and diagnostic testing.
- Microscopy Examination - Particles remain on the membrane surface for direct visual inspection, supporting identification and classification.
- Routine Sample Prep - Uniform microporous matrix provides consistent flow rates and reliable particle retention for general aqueous solutions.
- Aerosol Analysis - Low tare weight and acid digestibility enable chemical characterization of airborne particulates from air sampling.