CELLULOSE NITRATE MEMBRANE FILTERS


DESCRIPTION

    

Recommended for clarification and sterilization of aqueous solution, microbiological analysis and particle counts.
  • Made of cellulose nitrate.
  • Hydrophilic.
  • Very high flow rate.
  • High non-specific adsorption.
  • Resistant to aqueous solutions (pH 4-8), hydrocarbons and some dilute solvents.
  • Very uniform pore structure which ensures homogeneous distribution of the particles retained on the filter surface.
  • No enhancement or inhibition by the grid lines, due to chemical extractable or by the sterilization process.
  • Pore size from 0.20 µm to 8.00 µm.
  • Filter diameters from 13 mm to 293 mm.
  • White, black or green, gridded or plain, hydrophobic border, sterile.

Formats:
White membranes used in general laboratory applications
Gridded membranes for counts of colonies as a standard method of quantification
    ·   Grid, clearly defined (3.1 x 3.1 mm grid) and coloured (green and black), white in black membranes.
    ·   Special ink, non-toxic and totally free from bacterial growth inhibitors
Coloured membranes for counts of fungi and yeasts (the higher contrast allows easier counting)
    ·   Special ink, non-toxic and totally free from bacterial growth inhibitors
Sterilised membranes (packaged in individual blister) ensure the filter is not contaminated. Available in different formats

Sterile gridded membranes with hydrophobic border (3 and 6 mm) for analysis with samples that contain antibiotics, drugs, etc.


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TECHNICAL SPECIFICATIONS

Material
Pore
(µm)
Thickness (1)
( µm)
Flow rate (2)
(ml/min)
Bubble point (3)
(bar)
Cellulose nitrate
0.20
130
20
8.0
0.45
130
69
2.4
0.65
130
130
2.0
0.80
130
200
1.4
1.20
130
320
1.0
3.00
130
430
0.6
5.00
130
570
0.5
8.00
130
750
0.3

 

(1) Acc. DIN 53105
(2) Acc. DIN 58355: average value per cm² area at Ap = 1 bar
(3) Acc. DIN 58355

  • Adsorption :160 µg/cm² for γ-globulin and pore 0.2 µm (decreases with increasing pore size)
  • Extractables with water less than 1%
  • Sterilization : by autoclaving at 121ºC or 134ºC, y-radiation (25kGy) or with ethylene oxide
  • Maximum temperature 130ºC

 

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APPLICATIONS

  • Prefiltration, clarification, sterilisation.
  • Particle counts and particles analysis.
  • Membranes with larger pore sizes (8.00 µm, 5.00 µm and 3.00 µm) are used for Chemotaxis and retention large cells.
  • The membranes with a pore size of 0.45 µm are used for micro-organism counts (microbiological analysis).
  • Microbiological analysis of water, drug products, drinks, etc.
  • Particle size analysis.
  • Analysis of pharmaceuticals.
  • Immunological analysis, which requires a very low level of extractable substance in water.
  • Analysis of cell solutions.
  • Diagnostic (due to the high level of non-specific adsorption).

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ORDERING INFO

NON-STERILE

  White , plain ,Non sterile Nitrocellulose membrane (-BL)
  White ,gridded ,Non sterile Nitrocellulose membrane (-BC)
  White, green gridded, Non sterie Nitrocellulose membrane (-VC)
  Green, green gridded, Non sterie Nitrocellulose membrane (-VVC)
  Black, gridded, Non sterie Nitrocellulose membrane (-NC)
∅ / PORE
0.45 µm
0.65 µm
0.80 µm
1.20 µm
3.00 µm
5.00 µm
8.00 µm
13 mm
NC04513BL
-
NC08013BL
-
NC30013BL
NC50013BL
NC80013BL
25 mm
NC04525BL
NC06525BL
NC08025BL
NC12025BL
NC30025BL
NC50025BL
NC80025BL
NC04525BC
-
NC08025BC
NC12025BC
-
-
-
NC04525NC
-
-
-
-
-
-
37 mm
NC04537BL
-
NC08037BL
-
-
-
NC80037BL
-
NC08037BC
-
-
-
-
47 mm
NC04547BL
NC06547BL
NC08047BL
NC12047BL
NC30047BL
NC50047BL
NC80047BL
NC04547BC
NC06547BC
NC08047BC
NC12047BC
-
-
-
NC04547NC
NC06547NC
NC08047NC
-
-
-
-
NC04547VC
-
-
-
-
-
-
NC04547VVC
            
90 mm
NC04590BL*
-
NC08090BL*
NC12090BL*
-
NC50090BL*
-
142 mm
NC045142BL*
NC065142BL*
NC080142BL*
NC120142BL*
NC300142BL*
NC500142BL*
NC800142BL*
293 mm
NC045293BL*
-
NC080293BL*
NC120293BL*
-
NC500293BL*
NC800293BL*

 

STERILE

  Sterile Nitrocellulose membrane 47 mm
COLOUR / GRID // PORE
0.20 µm
0.45 µm
0.65 µm
0.80 µm
1.20 µm
3.00 µm
8.00 µm
White / plain (-BL)
-
NCS04547BL
NCS06547BL
NCS08047BL
NCS12047BL
NCS30047BL
NCS80047BL
White / black grid (-BC)
NCS02047BC
NCS04547BC
NCS06547BC
NCS08047BC
NCS12047BC
-
-
Black/ white grid (-NC)
-
NCS04547NC
NCS06547NC
NCS08047NC
-
-
-
White / green grid (VC)
-
NCS04547VC
NCS06547VC
-
NCS12047VC
-
-
Green / dark green grid (-VVC)
-
NCS04547VVC
-
-
-
-
-
White / black grid / Hydrophobic border 3 mm (-3H/BC)
NCS3H02047BC
NCS3H04547BC
-
-
-
-
-
White / black grid / Hydrophobic border 6 mm (-6H/BC)
-
NCS6H04547BC
-
-
-
-
-


Presentation: 100 units / box
*Presentation: 25 units / box
Other sizes available on request

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