Whatman
Nylon Membrane Circle, 0.2um Pore Size, 90mm, 50/Pk SKU: 7402-009

Nylon Membrane Filters - 7402-009

The Whatman 7402-009 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. Precision membrane geometry balances retention sharpness with sustainable flow rates, minimizing the pressure buildup that leads to premature filter replacement. For this reason, precision manufacturing ensures that each membrane disc delivers the rated retention, flow rate, and surface consistency that analytical and microbiological methods require.

Material Specifications

• Naturally hydrophilic and constructed with high tensile strength, Nylon provides reliable performance without pre-wetting in aqueous applications.
• High mechanical strength allows Nylon membranes to withstand elevated differential pressures without structural deformation.
• Packaged without sterilization for applications where downstream sterility is achieved by other means or is not a process requirement.
• Flexible and durable, eliminating the need for wetting agents that could contaminate samples.
• Broad compatibility with alcohols, aliphatic hydrocarbons, and aromatic solvents extends Nylon filtration into mixed-solvent sample preparation.

Transitioning from qualitative screening to quantitative gravimetric analysis requires a membrane with documented tare weight consistency, and the manufacturing tolerances above ensure that your blank values remain within acceptable limits. For this application, alkaline resistance that other membranes cannot match means you can filter high-pH buffers, basic mobile phases, and caustic wash solutions without the membrane degradation that limits cellulose-based and PES alternatives. 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)

40-49psi

Color

white

Diameter

90mm

Extractables

low

Filtration Area

63.62cm²

Flow Rate

> 50ml (Water)

Grid (Yes/No)

No

Material

Nylon

Maximum Operating Pressure

Holder-dependent

Maximum Operating Temperature (°C)

135°C

Membrane Thickness (µm)

150-187um

Pack Count

50

pH Range

3-14

Pore Size (µm)

0.2

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Alkaline Filtration - Withstands high-pH solutions during industrial fluid processing, offering durability where other polymers might degrade.
• Southern Blot Transfer - Binds nucleic acids strongly during capillary transfer, providing a durable matrix for repeated hybridization cycles.
• Northern Blotting - Excellent for RNA transfer applications where high tensile strength is required for multiple rounds of probe stripping.
• Solvent Mobilization - Clarifies organic mobile phases in glass vacuum holders, preventing particulate damage to sensitive HPLC pump seals.
• Atmospheric Testing - Used in dry deposition sampling to capture specific atmospheric nitrates and sulfates for environmental quality studies.
• Gene Mapping Support - Provides a stable, charge-modified surface for DNA immobilization, facilitating precise gene mapping and analysis steps.