WHA10407312
Whatman® mixed cellulose ester ME 25/21 filter discs 0.45 μm pore size
white, hydrophilic, black grid (3.1 mm), sterile, for membrane butler, 400 EA, 400 ea, 47 mm diam
Synonym(s):
Z697672, osmotic membrane, track etched membrane, water membranes
About This Item
product name
Whatman® ME membranes for microbiological control, ME25/21 STL membrane circles white, diam. 47 mm, pore size 0.45 μm, black grid, sterile
material
black grid
sterility
sterile
packaging
pkg of 400 ea
manufacturer/tradename
Whatman 10407312
Whatman Article No. 28415194 (US reference)
diam.
47 mm
membrane diam.
47 mm
pore size
0.45 μm
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General description
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.
Features and Benefits
- 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.
Other Notes
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Certificates of Analysis (COA)
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