Membrane filters made of a mixture of cellulose nitrate and cellulose acetate, a totally inert.
These membranes are characterized by a more uniform and smooth surface to the nitrocellulose, which makes it widely used in microbiological analysis, particle studies, chemotaxis, etc.
They are available in a wide range of pore diameters, sterile and non-sterile form, and even with the surface grid with grids of 3.1 mm2 for use in the colony count.
Bubble point with water (minimum value)
0.22 µm 3.62 bar | 362 Kpa
0.45 µm blanca 2.23 bar | 223 Kpa
0.45 µm negra 2.35 bar | 235 Kpa
0.65 µm 1.18 bar | 118 Kpa
0.8 µm 0.95 bar | 95 Kpa
1.0 µm 0.77 bar | 77 Kpa
3.0 µm 0.69 bar | 69 Kpa
5.0 µm 0.56 bar | 56 Kpa
8.0 µm 0.40 bar | 40 Kpa
Flow rate with water (ml/min /cm2)∆p=0.7 bar | 70
Kpa aprox.:
| 0.22 µm |
19 ml/min/cm² |
| 0.45 µm blanca |
60 ml/min/cm² |
| 0.45 µm negra |
60 ml/min/cm² |
| 0.65 µm |
135 ml/min/cm² |
| 0.8 µm |
180 ml/min/cm² |
| 1.0µm |
270 ml/min/cm² |
| 3.0 µm |
320 ml/min/cm² |
| 5.0 µm |
560 ml/min/cm² |
| 8.0 µm |
600 ml/min/cm² |
Porosity
0.22 µm 75%
0.45 µm 79%
0.65 µm 81%
0.8 µm 82%
1.0µm 82%
3.0 µm 83%
5.0 µm 84%
8.0 µm 84%
Thickness: 0.100 – 0.150 mm
Material
Mixed cellulose esters
Diameters: 13, 25, 47, 90, 142 and 293 mm.
Maximum temperature ≤ 90ºC
Maximum pressure: 8.7 psi
Extractables with water < 0.2%
Chemical compatibility: 4 – 8 pH
Reaction to the water: hydrophilic
Adsorption: Low non specific protein absorption
Esterilization: No
