| CHROMAFIL® GF/PET |
| Polyester syringe filters with glass fiber prefilters |
Features
Combi syringe filters with a coarse glass fiber prefilter and a small-pore membrane as main filter Chromafil-Combi-Filter
User benefits:
For solutions with a high load of particulate matter: lower back pressure, easy filtration
For high yields of filtrate: more mL of pure filtrate per filter
The technology:
The glass fiber membrane (1.0 µm) removes coarse particles, before they can block the fine main membrane. This results in a better filtration efficiency, especially for highly contaminated samples
| Housing: | Solvent-resistant, ultra low bleed polypropylene |
| Entry: | Luer lock |
| Exit: | Luer |
| Pore diameter: | 1.0 / 0.20 µm or 1.0 / 0.45 µm |
| Filter diameter: | 25 mm |
| Void volume: | < 80 µL |
| Packing unit: | 100 filters / BIG-BOX with 400 filters |
Hydrophilic multipurpose membrane
For polar and nonpolar solutions
the HPLC filter with glass fiber prefilter, especially suited for eluent mixtures of water and organic solvents
Recommended for solutions with a high load of particulate matter or for highly viscous solutions
| Type |
Pore size | Membrane | Color code | Standard pack | BIG-BOX | |||
| [µm] | dia. [mm] | top | bottom | Filters/pack | REF | Filters/pack | REF | |
| GF/PET-20/25 | 1.0/0.20 | 25 | blue | orange | 100 | 729032 | 400 | 729032.400 |
| GF/PET-45/25 | 1.0/0.45 | 25 | black | orange | 100 | 729033 | 400 | 729033.400 |
CHROMAFIL® filter membranes
Chemical compatibility of filter material
The following table lists the chemical compatibility of our CHROMAFIL® materials. The chemical compatibility depends on several parameters such as time, pressure, temperature and concentration. In most cases, CHROMAFIL® filters will have only short contact with a solvent.
In these cases they may be used despite of limited compatibility.
For example, a PTFE filter with PP housing does not liberate any UV-detectable substances during filtration of 5 mL THF, although PP shows only limited resistance towards THF.
| Solvent | Material | ||||||||||
| MV | CA | RC | PA | PTFE | H-PTFE | PVDF | PES | PET | GF | PP | |
| Acetaldehyde | – | – | o | o | |||||||
| Acetic acid, 100 % | – | – | – | – | |||||||
| Acetone | – | – | – | – | |||||||
| Acetonitrile | – | – | |||||||||
| Ammonia, 25 % | – | – | o | – | o | ||||||
| Benzene | o | o | |||||||||
| n-Butanol | o | ||||||||||
| Cyclohexane | o | ||||||||||
| Dichloromethane | – | – | – | – | |||||||
| Diethyl ether | o | o | o | ||||||||
| Dimethylformamide | – | – | o | – | – | ||||||
| 1,4-Dioxane | – | – | o | – | o | ||||||
| Ethanol | – | ||||||||||
| Ethyl acetate | – | – | o | ||||||||
| Ethylene glycol | o | o | |||||||||
| Formic acid, 100 % | – | o | – | o | |||||||
| Hydrochloric acid, 30 % | – | – | – | – | – | ||||||
| Methanol | – | – | |||||||||
| Nitric acid, 65 % | – | – | – | – | o | o | o | o | – | ||
| Oxalic acid, 10 % aqueous | – | – | |||||||||
| Petroleum ether | |||||||||||
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