WME WH GR 25mm 0.8um 100/Pk SKU: 7148-002

Mixed Cellulose Ester (MCE) Membrane Filters - 7148-002

The Whatman 7148-002 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. Optimized for laboratory use, verified 0.8 pore distribution across the Hydrophilic membrane surface guarantees batch-to-batch consistency in particle capture and analyte passage. 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

• Mixed Cellulose Ester membranes combine cellulose acetate and cellulose nitrate polymers to deliver a smoother, more flexible membrane surface than pure cellulose nitrate.
• The biologically inert blend of cellulose acetate and cellulose nitrate provides a membrane surface optimized for organism capture and colony enumeration in microbiological assays.
• Known for excellent wetting properties and high flow rates in aqueous filtration.
• Economical bulk packaging supports laboratories with high consumable throughput where individual sterile wrapping is unnecessary.
• Hydrophilic by nature, the MCE membrane structure supports high non-specific adsorption for effective organism capture.

Whether your method calls for gravimetric analysis, particle visualization, or microbial enumeration, the pore consistency and surface uniformity documented above ensure that your results reflect the sample — not the filter. The high porosity of MCE membranes delivers flow rates that keep your sample throughput practical even at the tighter pore sizes used for bacterial retention and fine particle analysis. Elevate the quality of your analytical data today by standardizing on a filtration product built to meet the exact specifications of your applications.

For more information about chemical compatibility, please review our Chemical Compatibility Chart.

Bubble Point (psi)

40.6psi

Color

white

Diameter

25mm

Extractables

low

Filtration Area

4.91cm²

Flow Rate

60ml (Water)

Grid (Yes/No)

No

Material

Mixed Cellulose Esters (MCE)

Maximum Operating Pressure

Holder-dependent

Maximum Operating Temperature (°C)

130°C

Membrane Thickness (µm)

135um

Pack Count

100

pH Range

4-9

Pore Size (µm)

0.8

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Aerosol Analysis - Dissolves completely in acid digestion, allowing for the total chemical analysis of captured airborne metal particulates.
• Gravimetric Analysis - Maintains structural integrity during filtration and drying, providing precise weight measurements of retained particulates.
• Yeast & Mold Monitoring - Optimized for the recovery of larger fungal organisms in beverage testing, providing a clear background for ID.
• Biochemical Assays - High electrostatic properties effectively bind proteins and macromolecules, supporting various diagnostic and research assays.
• Aqueous Filtration - Biologically inert composition provides high flow rates and consistent reliability for routine laboratory fluid processing.
• Microscopy mounting - Can be made transparent with immersion oil, allowing for direct light microscopy of retained particles on the surface.