Membrany z mieszaniny estrów celulozy, sterylne - 0.45 µm

Sterylne filtry membranowe z mieszaniny estrów celulozy, gładkie lub kratkowane, przeznaczone do rutynowego zliczania komórek oraz wykrywania cząstek.
• 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.

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.

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.

Sterile filters
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.
Product Product Name Pack size Diameter
10401670 Mixed Cellulose Ester Circle ME Range (ME 25); plain; sterile; 0.45 µm pore size; 47 mm 100 pieces 47 mm
10401672 Mixed Cellulose Ester Circle ME Range (ME 25); plain; sterile; 0.45 µm pore size; 50 mm 100 pieces 50 mm
10406572 Mixed Cellulose Ester Circle ME Range (ME 25); white/black grid 5 mm; sterile; 0.45 µm pore size; 50 mm 100 pieces 50 mm
10406800 ME25 SELECT/21 47MM ST 100/PK 100 pieces 47 mm
10406801 ME25 SELECT/21 50MM ST 100/PK 100 pieces 50 mm
10406802 ME25 SELECT/21 STL 50MM 400/PK 400 pieces 50 mm
10406803 ME25 Select 21 STL Circles; White; Mixed Esters; 47mm Dia; 0.45µm; 3.1mm Black Grid; Sterile; For Membrance Dispensers; 400/pk 400 pieces 47 mm
10406870 ME25/21 (Mixed Cellulose Ester) ST Membrane Circle; white; 47 mm 0.45 µm; 3.1 mm black grid; sterile 100 pieces 47 mm
10406871 Mixed Cellulose Ester Circle ME Range (ME 25); white/black grid 3.1 mm; sterile; 0.45 µm pore size; 47 mm 1000 pieces 47 mm
10406872 ME25/21 (Mixed Cellulose Ester) ST Membrane Circle; white; 50 mm 0.45 µm; 3.1 mm black grid; sterile 100 pieces 50 mm
10407312 ME25/21 (Mixed Cellulose Ester) STL Membrane Circle; white; 47 mm 0.45 µm; 3.1 mm black grid; sterile; for Membrane-Butler 400 pieces 47 mm
10407314 ME25/21 (Mixed Cellulose Ester) STL Membrane Circle; white; 50 mm 0.45 µm; 3.1 mm black grid; sterile; for Membrane-Butler 400 pieces 50 mm
10407324 ME25 (Mixed Cellulose Ester) Membrane Circle; white; 50 mm 0.45 µm; 5 mm black grid; sterile; for Membrane-Butler 400 pieces 50 mm
10407332 ME25/31 (Mixed Cellulose Ester) STL Membrane Circle; black; 47 mm 0.45 µm; 3.1 mm white grid; sterile; for Membrane-Butler 400 pieces 47 mm
10407334 ME25/31 (Mixed Cellulose Ester) STL Membrane Circle; black; 50 mm 0.45 µm; 3.1 mm white grid; sterile; for Membrane-Butler 400 pieces 50 mm
10407370 ME25/41 (Mixed Cellulose Ester) STL Membrane Circle; green; 47mm 0.45 µm; 3.1 mm black grid; sterile; for Membrane-Butler 400 pieces 47 mm
10407372 ME25/41 (Mixed Cellulose Ester) STL Membrane Circle; green; 50 mm 0.45 µm; 3.1 mm black grid; sterile; for Membrane-Butler 400 pieces 50 mm
10407970 Mixed Cellulose Ester Circle ME Range (ME 25); white/black grid 3.1 mm; sterile; 0.45 µm pore size; 47 mm 100 pieces 47 mm
10409470 ME25/41 (Mixed Cellulose Ester) ST Membrane Circle; green; 47 mm 0.45 µm; 3.1 mm black grid; sterile 100 pieces 47 mm
10409472 ME25/41 (Mixed Cellulose Ester) ST Membrane Circle; green; 50 mm 0.45 µm; 3.1 mm black grid; sterile 100 pieces 50 mm
10409770 Mixed Cellulose Ester Circle ME Range (ME 25); black/white grid 3.1 mm; sterile; 0.45 µm pore size; 47 mm 100 pieces 47 mm
10409771 Mixed Cellulose Ester Circle ME Range (ME 25); black/white grid 3.1 mm; sterile; 0.45 µm pore size; 47 mm 1000 pieces 47 mm
10409772 Mixed Cellulose Ester Circle ME Range (ME 25); black/white grid 3.1 mm; sterile; 0.45 µm pore size; 50 mm 100 pieces 50 mm
7140-104 Mixed Cellulose Ester Circle WME Range; 0.45 µm pore size; sterile; individually packed; white; plain; with pad; 47 mm; 100 pieces 100 pieces
7141-104 Mixed Cellulose Ester Circle WME Range; 0.45 µm pore size; sterile; individually packed; white; gridded; with pad; 47 mm; 100 pieces 100 pieces 47 mm
7141-114 Mixed Cellulose Ester Circle WME Range; 0.45 µm pore size; sterile; individually packed; white; gridded; without pad; 47 mm; 100 pieces 100 pieces 47 mm
7141-124 Mixed Cellulose Ester Circle WME Range; 0.45 µm pore size; sterile; individually packed; white; gridded; without pad; 47 mm; 200 pieces 200 pieces 47 mm
7141-154 Mixed Cellulose Ester Circle WME Range; 0.45 µm pore size; sterile; individually packed; white; gridded; without pad; 47 mm; 1000 pieces 1000 pieces 47 mm
7153-104 Mixed Cellulose Ester Circle WME Range; 0.45 µm pore size; sterile; individually packed; black; gridded; with pad; 47 mm; 100 pieces 100 pieces 47 mm
7187-114 Mixed Cellulose Ester Circle WME Range; 0.20 µm pore size; sterile; individually packed; white; gridded; without pad; 47 mm; 100 pieces 100 pieces 47 mm