Description
Specifications Table
Product Name – Whatman NUC PC BL Membrane Filter
Quantity/Pack Size – 25MM,0.2uM (Pack of 100), 25MM,0.4uM (Pack of 100), 25MM,0.8uM (Pack of 100), 47MM,0.2uM (Pack of 100)
Form – Circular membrane discs
Grade – Nuclepore polycarbonate, black-stained
Application – Sterile filtration, particle analysis, protein binding studies
Product Overview
The Whatman NUC PC BL Membrane Filter is a premium-grade polycarbonate membrane designed for critical laboratory applications requiring precise particle retention and high protein binding capacity. Engineered with a unique track-etched structure, these membranes offer absolute retention ratings with uniform pore sizes (0.2?m, 0.4?m, or 0.8?m) for consistent filtration performance. The black-stained variant enhances contrast for particle counting and microscopy applications, while the inherently low extractable levels ensure minimal interference in sensitive assays. Constructed from pure polycarbonate without binders or surfactants, these membranes maintain chemical compatibility with a wide range of solvents and aqueous solutions. The smooth, non-fibrous surface minimizes particle entrapment and enables easy recovery of retained materials. Available in both 25mm and 47mm diameters, these filters are compatible with standard filtration apparatus. The hydrophilic nature of the membrane allows for rapid wetting and high flow rates, reducing processing time while maintaining filtration integrity. Each membrane undergoes rigorous quality control to ensure lot-to-lot consistency, making them ideal for applications where reproducibility is critical. The polycarbonate composition provides excellent thermal stability and resistance to most acids and alkalis, extending the membrane’s utility across diverse laboratory protocols.
FAQs
Q1. What applications is the NUC PC BL Membrane Filter suitable for?
This track-etched polycarbonate membrane is ideal for applications requiring consistent, sharply defined pore sizes such as particle capture, microbial sampling, filtration of fluids or gases, and microscopy preparation.
Q2. What are the key material and performance features of this filter?
The membrane is manufactured from high-quality polycarbonate film, offering low protein binding, low extractables (minimizing sample contamination), good chemical resistance, and thermal stability. It also features a smooth flat surface for clear visibility of particles.
Q3. How do I select the correct pore size and diameter for my application?
The Whatman NUC PC line comes in a wide range of pore sizes (from very fine sub-micron to several micrometres) and diameters (13 mm, 19 mm, 25 mm, 47 mm, 50 mm, etc.) to suit different flow rates, sample volumes and filtrand-load conditions. Pick the pore size based on the smallest particle you need to trap or exclude; choose diameter based on your filter holder or setup.
Q4. Are there any special storage or handling considerations?
Yes. Because the membranes are precision-etched and have very low extractables, it’s best to handle them with clean tools (tweezers) or gloves to avoid contamination. Store them in their original sealed packaging, in a dry, temperature-stable environment, protected from dust. Avoid bending or folding the membrane circle. (General best-practice for track-etched membranes.)
Q5. Can the membrane be used for both aqueous and organic solvent filtration?
Yes, the polycarbonate material provides good chemical resistance and thermal stability, making it compatible with many aqueous, organic and mixed solvent systems — provided that the solvent is compatible with polycarbonate (you’ll need to check the chemical compatibility for highly aggressive solvents).
