ME25/51 ST 0.45um 47mm 100/Pk SKU: 10407970

Mixed Cellulose Ester (MCE) Membrane Filters - 10407970

Designed to deliver reproducibility and confidence across critical sample types, the Whatman 10407970 provides the filtration consistency that method validation demands. Engineered for demanding applications, precision-manufactured Hydrophilic membrane with a verified 0.45 pore structure delivers consistent retention across the full operating range. To this end, lot-level verification of pore size, flow rate, and physical dimensions ensures that membrane performance remains predictable when scaling from method development to routine analysis.

Material Specifications

• Known for excellent wetting properties and high flow rates in aqueous filtration.
• Hydrophilic by nature, the MCE membrane structure supports high non-specific adsorption for effective organism capture.
• The biologically inert blend of cellulose acetate and cellulose nitrate provides a membrane surface optimized for organism capture and colony enumeration in microbiological assays.
• Mixed Cellulose Ester membranes combine cellulose acetate and cellulose nitrate polymers to deliver a smoother, more flexible membrane surface than pure cellulose nitrate.
• Low tare weight and complete solubility in organic solvents make MCE the standard membrane for gravimetric particulate analysis where method specifications demand minimal blank correction.

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, MCE's naturally hydrophilic surface allows immediate wetting upon contact with aqueous samples, eliminating the pre-conditioning step and letting you begin filtration as soon as the membrane is seated in your holder. 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)

40.6psi

Color

white

Diameter

47mm

Extractables

low

Filtration Area

17.35cm²

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)

145um

Pack Count

100

pH Range

4-8

Pore Size (µm)

0.45

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Black Grid Analysis - Black membrane variants enhance contrast for light-colored colonies, reducing eye strain during manual plate counting.
• 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.
• Bioburden Monitoring - Routine testing of pharmaceutical water loops to ensure bioburden levels remain within safe production specifications.
• Chemotaxis Assays - Acts as a barrier in Boyden chambers, allowing cells to migrate through defined pores towards a chemoattractant source.
• Yeast & Mold Monitoring - Optimized for the recovery of larger fungal organisms in beverage testing, providing a clear background for ID.