Membrane Filters

DHI LAB Products is a supplier of former Poretics, GE Osmonics, now GVS filters

Cheap prices on filters, please see our pricelist

  

 

 

 

 

 

 

GVS, former GE Osmonics, Polycarbonate Membrane Filters (PCTE)

  • Smooth thin glass-like surface with cylindrical pores capturing 100% of cells larger than pore size 
  • Ideal for particle identification by microscopy
  • Precise pore sizes and pore distribution for absolute filtration and separation
  • Negligible absorption and adsorption

GVS, former GE Osmonics, Black Polycarbonate Membrane Filters (PCTE)

  • Zero auto fluorescence, ideal for epifluorescence microscopy
  • Permit phytoplankton, bacteria, yeasts, etc to be visible
  • Smooth surface plane for microscopy

The epifluorescence microscopy technique is used for the assay of microorganisms in water samples, food and dairy products, wines and beverages, and for general micro-biological laboratory, medical, and research purposes.

The basic procedure is simple and reproducible:

  1. A known quantity of liquid is filtered through a black polycarbonate membrane
  2. The microorganisms, e.g., bacteria, are stained on the surface of the filter or prior to filtering, while some organisms like algae show auto fluorescence
  3. The fluorescing microorganisms are observed using an epifluorescence microscope.

 

GVS, former GE Osmonics (Polycarbonate PCTE) Membrane Filters
 Diameters - mm

13
25
47

 Colours  White (standard)
 Black (suitable for microscopy)
 Pore sizes - µm

0.2
0.4
0.6
0.8
1.0
2.0
3.0
4.0
5.0
8.0
10.0
20.0

 Other filter materials

 Cellulose acetate (CA)
 Mixed cellulose ester (MCE)
 Nylon (NY)
 Polyethersulfone (PES)
 Polytetrafluoroethylene (PTFE)
 Polypropylene (PP)

Most polycarbonate (PCTE) filters are in stock

               

GVS, former GE Osmonics Cameo, Teflon PTFE Syringe Filters

  • Non-sterile and hydrophobic
  • Especially suited for HPLC samples
  • Negligible absorption and adsorptionSyringe filters

 

 GVS, former GE Osmonics Teflon (PTFE) Syringe Filters
 Diameters - mm

17
30

 Pore sizes - µm

0.20
0.45

 Other syringe filter materials

 Cellulose acetate (CA)
 Mixed Cellulose Ester (MCE)
 Nylon
 Polyethersulfone (PES)
 Polyproylene
 Polyvinylidene difluoride (PVDF)

 Options  Can be ordered with a pre-filter

Teflon (PTFE) syringe filters, 0.2 µm pore size and 17 mm diameter are in stock. These are especially suited for pre-filtering solvent extracts prior to HPLC analysis.


Want to know more ?

DHI LAB Products

c14@dhigroup.com



DHI LAB products  Agern Allé 5  2970 Hørsholm  Denmark  Tel: +45 4516 9083  c14@dhigroup.com