Polycarbonate Track Etch Membrane Discs, 2.0um, 25mm, Black, Nonsterile, 100/Pk
GVS SKU: 1215297

Featuring a thin polycarbonate film with precisely defined, straight-through cylindrical pores, these Polycarbonate Track Etch (PCTE) membrane discs deliver an exact 2.0um nominal pore size across a 25mm diameter. The membrane is treated with PVP (polyvinylpyrrolidone) for a hydrophilic surface and dyed black to minimize autofluorescence, providing a dark, high-contrast background that enhances sensitivity in epifluorescence and optical microscopy. Because particle capture occurs on a single, flat plane at the surface, these screen-type membranes provide an accurate, reproducible separation cut-off. Each pack contains 100 nonsterile discs.

Key Polycarbonate Track Etch Membrane Characteristics

• Hydrophilic surface: PVP treatment makes the naturally hydrophobic polycarbonate film wettable for aqueous samples.
• Surface capture: Precise, cylindrical pores retain particles on a smooth, flat surface rather than within a tortuous matrix, giving an accurate size cut-off.
• Low protein binding: The smooth film exhibits low non-specific binding for high-purity work.
• Black, low-autofluorescence finish: The black dye reduces background fluorescence to improve detection sensitivity and contrast for microscopy.
• Chemical staining resistance: The film resists chemical staining to ease microscopic visualization.

Key Construction Characteristics

• Material: Polycarbonate Track Etch (PCTE) film, black.
• Format: 25mm diameter disc with a nominal thickness of 0.005 to 0.02mm (5 to 20um).
• Sterility: Nonsterile.
• Packaging: 100 discs per pack.

These membranes deliver consistent, reproducible particle retention thanks to a tightly controlled pore size and density. The smooth, flat surface keeps captured particles in a single plane for clear visualization, while the dark background supports sensitive fluorescence and optical analysis. The result is reliable performance and preserved sample integrity across demanding filtration and analytical workflows.

Color

Black

Diameter

25mm

Grid (Yes/No)

No

Material

Polycarbonate Track Etch (PCTE)

Membrane Color

Black

Membrane Thickness (µm)

5 to 20

Pack Count

100

Pore Size (µm)

2.0

Sterility

Nonsterile

Wettability

Hydrophilic

• Epifluorescence Microscopy The black, low-autofluorescence surface provides a dark background that improves contrast and sensitivity when imaging fluorescently labeled cells and microorganisms.
• Microbial Enumeration The uniform pore size and flat surface retain organisms on a single plane for accurate direct counting of bacteria and other microbes.
• Particle Analysis Precise, cylindrical pores capture particles on the membrane surface for reproducible size separation and SEM or optical particle analysis.
• General Filtration The 2.0um PCTE membrane handles routine clarification and particulate removal in aqueous samples.
• Plasma Sample Preparation The defined pore structure supports separation of cellular material such as removing red blood cells from plasma.
• Phytoplankton and Cell Capture Surface retention on a smooth, flat membrane facilitates collection and direct observation of cells and plankton.