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Thumbnail Filmstrip of Cellulose Nitrate Membrane Circle, Plain, 0.2um Pore Size, 25mm, 100/Pk Images
Cellulose Nitrate (CN) Membrane Filters - 7182-002
Designed to deliver reproducibility and confidence across critical sample types, the Whatman 7182-002 provides the filtration consistency that method validation demands. Moreover, precision membrane geometry balances retention sharpness with sustainable flow rates, minimizing the pressure buildup that leads to premature filter replacement. Consistent surface properties across the full membrane area support uniform particle capture and reliable results in gravimetric, microscopic, and culture-based analytical workflows.
Material Specifications
- Surface retention characteristics allow captured particles and microorganisms to remain on the membrane face, supporting direct microscopic examination and physical recovery of collected material.
- Cellulose nitrate membranes feature a narrow pore size distribution and low extractable levels, providing the controlled retention characteristics required for gravimetric and particulate analysis.
- Dissolves completely in specific organic solvents, enabling full recovery of captured particles from the membrane surface for downstream gravimetric, chemical, or spectroscopic analysis.
- Bulk packaging format provides cost-effective access for high-volume laboratories performing non-critical filtration and sample preparation.
- 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.
Microbial enumeration methods require complete retention at the rated pore size and a surface that supports colony growth without inhibition, and the membrane specifications above confirm both requirements for your culture-based workflows. Meeting this challenge, the narrow pore size distribution of cellulose nitrate membranes ensures your retention data is consistent across batches, reducing the inter-sample variability that complicates quantitative particulate and microbiological analyses. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.
For more information about chemical compatibility, please review our Chemical Compatibility Chart.
- Bubble Point (psi)
- 53.6psi
- Color
- white
- Diameter
- 25mm
- Extractables
- low
- Filtration Area
- 4.91cm²
- 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
- Colony Enumeration - Gridded surface variants facilitate accurate plate counting of captured microorganisms under standard magnification.
- Bioburden Monitoring - Surface retention keeps captured organisms accessible for direct incubation and enumeration without transfer steps.
- Routine Sample Prep - Uniform microporous matrix provides consistent flow rates and reliable particle retention for general aqueous solutions.
- Water Quality Testing - Narrow pore distribution retains indicator organisms consistently for regulatory compliance in environmental laboratories.
- Biochemical Assays - High protein-binding capacity effectively immobilizes macromolecules, supporting lateral flow and diagnostic testing.
- Gravimetric Particulate Analysis - Dissolves in organic solvents for complete particle recovery and accurate weight-based quantification.