Nuclepore Hydrophilic Membrane, 3.0um Pore Size, 90mm Circle, 25 Pk SKU: 10418318

Polycarbonate Track-Etched (PCTE) Membrane Filters - 10418318

The Whatman 10418318 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. A uniform Polycarbonate Track-Etched (PCTE) matrix maintains its rated 3.0 cutoff under the pressures and flow conditions encountered during routine laboratory filtration. On this basis, from raw polymer through final inspection, the manufacturing process is designed to ensure that every membrane disc meets the performance specifications of its grade designation.

Material Specifications

• Optically clear construction enables direct on-membrane visualization of captured particles without transfer or additional preparation.
• Uniform pore density across the membrane surface ensures representative sampling for environmental and biological particulate analysis.
• Low protein binding and biologically inert surface properties make track-etched Polycarbonate compatible with cell biology and cytology workflows.
• Offer a smooth, flat glass-like surface specifically designed for microscopy analysis.
• Manufactured with tight pore size control for precise separation of cells and particulates.

When your analytical method specifies membrane filtration as a sample preparation step, the retention characteristics and extractable profiles documented above allow you to meet method requirements without additional qualification work. Defined pore geometry gives you a membrane that functions as a precision sieve, capturing particles strictly by size rather than the impaction and diffusion mechanisms that depth filters rely on. 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)

N/A

Color

translucent

Diameter

90mm

Extractables

very low

Filtration Area

63.62cm²

Flow Rate

20 L (Air)

Grid (Yes/No)

No

Material

Polycarbonate (PC)

Maximum Operating Pressure

Holder-dependent

Maximum Operating Temperature (°C)

140°C

Membrane Thickness (µm)

6–11um

Pack Count

25

pH Range

2-11

Pore Size (µm)

3

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophobic

• Parasite Detection - Concentrates blood samples to detect microfilariae on a transparent surface, simplifying identification without staining.
• Liposome Sizing - Used in extrusion devices to force lipid suspensions through exact pores, creating uniform unilamellar vesicles for drug delivery.
• Chemotaxis Migration - Acts as a precise barrier in Boyden chambers to measure cell migration towards chemoattractants without passive diffusion.
• Oceanographic Sampling - Fractionates plankton populations by size in seawater, ensuring precise separation for biomass and diversity studies.
• Asbestos Analysis - Provides a smooth, flat surface for collecting airborne fibers, allowing for direct counting via phase-contrast light microscopy.
• Legionella Recovery - Captures bacteria from hot water samples on a flat plane for direct fluorescent antibody staining and microscope counting.