Whatman Mixed Cellulose Ester Membrane - MEMBRANE, MIXED, ME25 ST 0.45UM 50MM 100PK - 10401672

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Product Information: MEMBRANE, MIXED, ME25 ST 0.45UM 50MM 100PK

Manufacturer Part # 10401672

Description

• Mixed Cellulose Ester Circle ME Range (ME 28), green/black grid 3.1 mm, sterile, 1.2 m pore size
• Sterile options available for critical applications
• Excellent contrast for easier particle detection
• Grids are nontoxic and do not inhibit bacterial growth, ensuring sample integrity
• Black plain and black gridded membranes have a mix of cellulose nitrate and cellulose acetate
• The membrane offers a high degree of internal surface area for greater adsorption of product
• Higher dirt loading capacity
• Biologically inert with good thermal stability
• No surfactants to contaminate samples
• Uniform microporous structure of membrane gives high flow rates
• Whatman mixed cellulose ester membranes are composed of cellulose acetate and cellulose nitrate
• These membranes are characterized by a smoother and more uniform surface than pure nitrocellulose filters
• Also, the color contrast provided by the filter surface facilitates particle detection and minimizes eye fatigue
• The ME range has a lower cellulose acetate content compared to the WME range of membranes
• Eased counting process:
• In microbiological colony counting procedures, the color contrast between the surface and the colonies facilitates the counting process
• Plain or gridded:
• Many microbiological techniques include colony counting after incubation as the standard method of quantitation
• Whatman gridded filters have clearly defined grid lines spaced at 3.1 mm or 5 mm intervals
• The special ink used is nontoxic and completely free from bacterial growth inhibitors
• Whatman black mixed cellulose esters are available plain for automatic colony counting applications, as well as gridded to assist in manual counting procedures
• Black membranes provide contrast between residue or cell colors and the filter without having to counter-stain the membrane
• Sterile filters:
• For those laboratories preferring to use membranes sterilized by autoclaving for microbiological work, Whatman provides black gridded membranes in packs with pads ready for laboratory autoclaving