Main -> Separating systems -> Filtration -> Membrane filters
Membrane Filters, Hahnemühle
1 Cellulose acetate membrane filters

Recommended for aqueous samples, biological applications and protein filtration.

  • Made entirely from pure cellulose acetate, hydrophilic, high flow rate
  • High thermal stability, maximum temperature 180ºC
  • Suited for use in pressure filtration devices
  • Resistant to aqueous solutions with pH 4 – 8, most alcohols, hydrocarbons and oils
  • Sterilization: by autoclaving at 121ºC or 134ºC, with γ-radiation, dry heat or ethylene oxide
Ø
mm
PU
pc/Pack
Pore size µm
0.200.45
Order No.Order No.
 2510010 15 92025
 4710010 15 9104710 15 92047
1422510 15 92142


2 Cellulose nitrate membrane filters

Recommended for clarification and sterilization of aqueous solution, microbiological analysis and particle counts.

  • Hydrophilic, very high flow rate
  • High non-specific adsorption: 160 µg/cm2 for γ-globulin (decreases with increasing pore size)
  • Resistant to aqueous solutions (pH 4 – 8), hydrocarbons and some dilute solvents
  • Extractables with water less than 1%
  • Sterilization: by autoclaving at 121ºC, γ-radiation (25 kGy) or with ethylene oxide
Pore size
µm
Ø
mm
VersionOrder No.PU
pc/Pack
0.250non sterile, white10 15 93039100
0.4525non sterile, white, gridded10 15 93041100
0.4547non sterile, white, gridded10 15 93042100
0.4547non sterile, white10 15 93043100
0.4550non sterile, white10 15 93050100
0.847non sterile, white10 15 93051100
3.047non sterile, white10 15 93044100
5.047non sterile, white10 15 93045100
0.247sterile, white, gridded10 15 93046100
0.4547sterile, white, gridded10 15 93047100
0.4547sterile, white10 15 93048100
0.4547sterile, black, gridded10 15 93049100


Mixed cellulose ester membrane filter

Recommended for clarification and sterilisation of aqueous solutions, microbiological analysis and particle counts.

  • Made of a blend of cellulose nitrate and cellulose acetate, hydrophilic
  • High flow rate
  • High non-specific adsorption
  • Qualified for aqueous solutions (pH 4-8), hydrocarbons and some dilute solvents
  • High mechanical stability, robust to handle
  • Ideal for gravimetrical measurements
Pore size
µm
Ø
mm
VersionOrder No.PU
pc/Pack
0.250white, non sterile10 15 94030100
0.4525white, non sterile10 15 94031100
0.4550white, non sterile10 15 94028100
0.4547black, sterile, gridded10 15 94042100
0.4550white, sterile, gridded10 15 94029100



Other sizes on request.

Nylon membrane filters

Recommended for filtration, sterilisation and clarifications of mobile phase in HPLC processes and with aqueous, alkaline and organic samples.

  • Made entirely of polyamide, hydrophilic, white
  • Resistant to many solvents and alkali-solutions, pH range 3 – 14
  • High non-specific adsorption
  • Adsorption: BSA 100 µg/cm2 (for 0.2 µm pore size)
  • Extractables with water less than 1%
  • Sterilization by autoclaving at 121ºC, γ-radiation (25 kGy) or with ethylene oxide
Pore size
µm
Ø
mm
Order No.PU
pc/Pack
0.22510 15 95050100
0.24710 15 95051100
0.452510 15 95052100
0.454710 15 95053100
0.459010 15 9505425


3 Polycarbonate membrane filters

Recommended for electron microscopy analysis due to its homogeneous translucence and plain surface.

  • Made of high grade polycarbonate film, hydrophilic
  • Track-etched manufacturing method
  • High chemical and heat stability
  • High translucency, no auto-fluorescence as background
  • Low non-specific adsorption: <5 µg/cm² with BSA
  • Extractable with water less than 1%
  • Sterilization: by autoclaving at 121ºC or 134ºC, γ-radiation or ethylene oxide
Pore size
µm
Ø
mm
Order No.PU
pc/Pack
 0.054710 15 96081100
 0.14710 15 96082100
 0.21310 15 96083100
 0.22510 15 96084100
 0.24710 15 96085100
 0.44710 15 96086100
 3.04710 15 96088100
 5.04710 15 96089100
10.04710 15 96087100



Other sizes on request.

4 Accessories for filtration with membranes

Ready-to-use monitors for colony counting. For microbiological testing of pharmaceuticals, cosmetics, food, beverages, water and other liquids.

  • With a gridded cellulose nitrate membrane filter (47 mm) and cellulose pad
  • Ready to use – can be adapted to multi-branch by adapter
  • After filtration and removal of the scaled 100 ml funnel, the monitor can be used as a petri dish with magnifying glass in the lid
  • Now, simply soak the membrane and filter cardboard in it with the culture medium of your choice to prepare them for incubation
  • Perfect for routine analyses with high sample volumes: saves time and money!
  • Available with black or white gridded membrane
  • Monitors with cellulose nitrate membranes assure effective retention with high flow rates and optimum
  • Available as sterile filter and individually packaged
Pore size
µm
Ø
mm
VersionOrder No.PU
pc/Pack
0.4547white, sterile, gridded10 15 9702150
0.4547black, sterile, gridded10 15 9702250