Membrane Filter, 47 mm dia, White/Black, Mixed Cellulose Ester

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.

Diameter	:	47 mm
Grid Color	:	Black
Material	:	Mixed Cellulose Ester
Grid Size	:	3.1 mm
Pore Size	:	0.45 µm
Sterility	:	Sterile
Type	:	ME 25/21
Format	:	Circle
Interleaving Paper	:	Yes
Nominal Basis Weight	:	4.3 to 5 mg/cm2
Operating Temperature	:	130°C
Porosity	:	74 to 77%
Protein Binding	:	Medium
Solvent Resistancy	:	Medium
Application	:	For Higher Flow Rates and Larger Volume Filtration Including Clarification or Sterilization of Aqueous Solutions, Particulate Analysis and Removal, Air Monitoring and Microbial Analysis
Autoclavable	:	Yes
For Membrane Butler	:	No
Hydrophilic	:	Yes
With	:	Without Pad
Color	:	White

Excellent contrast for easier particle detectionGrids are nontoxic and do not inhibit bacterial growth, ensuring sample integrityBlack plain and black gridded membranes have a mix of cellulose nitrate and cellulose acetateThe membrane offers a high degree of internal surface area for greater adsorption of productHigher dirt loading capacityBiologically inert with good thermal stabilityNo surfactants to contaminate samplesUniform microporous structure of membrane gives high flow ratesEased counting process