CELLULOSIC MEMBRANES

Typical Data

Sample preparation
Microbiological studies
Filtration of aqueous solutions

Applications

Narrow pore size distribution for improved surface capture and analysis
Low levels of extractables to ensure sample integrity

Features and Benefits

Whatman cellulose nitrate membranes are recommended for routine laboratory applications involving aqueous solutions. The membranes exhibit very narrow pore size distribution and have low levels of extractables.
The membranes are strong and flexible and can withstand handling and autoclaving procedures without loss of integrity. Cellulose nitrate membranes are supplied as circles, sheets, or reels.

Cellulose Nitrate

Bacteriological studies
Particle counting from liquids and aerosols

Applications

Sterile options available for critical applications
Excellent contrast for easier particle detection
Grids are nontoxic and do not inhibit bacterial growth, ensuring sample integrity
Autoclavable for repeated use

Features and Benefits

Whatman mixed cellulose ester membranes are suitable for routine applications involving aqueous solutions. Compared to pure nitrocellulose filters, these membranes have a smoother and more uniform surface as well as offering excellent color contrast for particle detection.
The membranes are also available in black and are gridded to assist in manual counting procedures. The grids are printed using nontoxic ink and are completely free from b'acterial growth inhibitors. The membranes provide excellent contrast between the residue or cell colonies and the filter, eliminating the need to counterstain the membrane.