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Mixed cellulose ester membranes, sterile, 0,45 µm, Whatman™

Dodavatel: Whatman products (Cytiva)
7140-104 7141-104 7141-114 7153-104 10401670 10401672 10406572 10406870 10406871 10406872 10407312 10407314 10407370 10407372 10407970 10409470 10409472 10409770 10409771 10409772 10407332 10407334 7141-124 10407324 7141-154
516-1140EA 6570 CZK
516-1140 514-8070 514-8071 516-1148 514-2652 514-2653 514-3332 514-3362 514-0379 514-3372 514-1148 514-2164 514-1151 514-1152 514-3423 514-3395 514-3397 514-3386 514-0731 514-3388 514-1149 514-1150 514-0771 514-0730 514-0772
Mixed cellulose ester membranes, sterile, 0,45 µm, Whatman™
Filtry Filtry membránové
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.

  • 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

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.

In microbiological colony counting procedures, the color contrast between the surface and the colonies facilitates the counting process.

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.

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.
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