WHA7141114
Whatman® mixed cellulose ester WME filter discs 0.45 μm pore size
white, hydrophilic, gridded, sterilzation: yes, interleaving paper, without pad, 100 EA, 100 ea, 47 mm diam
Synonym(s):
Whatman® nitrocellulose membrane filters, Whatman filter, Z745847, membrane filters, syringe filter
About This Item
product name
Whatman® mixed cellulose ester membrane filters, gridded white (without pad), pore size 0.45 μm, diam. 47 mm, sterile
material
gridded white (without pad)
sterility
sterile
packaging
pack of 100 ea
manufacturer/tradename
Whatman 7141-114
Whatman Article No. 28420720 (US reference)
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)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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