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Whatman™ Mixed Cellulose Ester Membranes, Sterile, 0.45 µm

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10034-966PK 1183.92 USD InStock
CA28159-525 10034-966 CA11008-530 10034-960 10034-918 CA11012-908 CA13500-162 CA28151-138 89233-768 28159-525 CA11013-524 CA14230-030 28297-734 28297-732 89233-764 89233-766 28151-150 CA13500-170 13500-162 28151-142 CA89233-768 CA28151-150 14230-030 CA89233-766 28151-146 CA89233-764 11008-580 CA28297-732 28151-140 97016-792 CA28297-734 13500-170 30253-266 CA28151-140 10034-970 CA28151-142 CA11013-820 CA11013-984 CA11013-500 CA28151-146 CA11013-980 CA11013-584 CA97016-792 10034-978 CA11008-580 11008-530 10034-968 28151-138 10035-800 CA30253-266
Whatman™ Mixed Cellulose Ester Membranes, Sterile, 0.45 µm
Filters Membrane Filters
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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