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Circles and sheets. Qualitative. Slightly thicker and more retentive than number 1.

Flowrate: Retention: Wet strength: Thickness: Ash:

Medium Medium Low 0.19mm 0.06%

For the ready-to-use filter units only virgin raw material is used. This ensures that there is no interaction with the sample to be filtered, provided that the units are used properly. The filter units are intended for laboratory use only and at temperatures up to 60°C.
Note: If syringes with a volume <10 ml are used, a pressure could be created which exceeds the max. operating pressure (700 kPa/7 bar) of the filter unit. EtO-sterilized = endotoxin free according to LAL-Test (USPXXIII), Sensitivity: 0.25EU/ml.

• Inlet female luer-lock
• Outlet luer cone or extended tip
• Autoclavable at 121°C

For aqueous solutions. Polycarbonate (PC) housing.
Membrane cellulose nitrate (CN) or cellulose acetate (CA)
Filtration of protein-containing solutions with minimal sample loss.

Medium fast, 4 - 7 µm.

• time saving, because folded filters have a larger surface area
• filter faster than comparable circular filters
• for medium to fine precipitates and general laboratory work
• Weight: 68 g/m²
• Thickness: 0.15 mm

Alternativa Filter paper, qualitative, type MN 615, circles Alternativa Filter paper 595, qualitative, folded filters

Circles. Qualitative. Fast flowrate. Excellent retention of coarse and gelatinous precipitants. Smooth. Supplied in packs of circles as outlined below.

Flowrate: Retention: Wet strength: Thickness: Ash:

Fast High Low 0.21mm 0.06%

Ideal for weighing and transporting all types of sample. Especially for determination of nitrogen according to Kjeldahl (e.g. determination of total protein content in foodstuff). Made of nitrogen-free parchment paper. Can be dropped into the Kjeldahl flask and be dissolved together with the sample.

Glass microfibre filters have a fast filtration and a high loading capacity and particle retention rate. Manufactured without chemical binder from high grade borosilicate glass. (Exception: GF6, GF9). They are suitable for gravity or low suction filtration. Filtration speeds generally very much higher than conventional cellulose papers. Efficient retention of micron size particles. Must be used flat. Ideal for use in flat perforated plate Buchner type funnels (not sintered glass models). Can be used up to 500°C
Wide range of applications including:

• retention of fine analytical precipitates
• retention of biochemical gelatinous precipitates
• water/air pollution analyses
• as prefilters for membranes
• scintillation counting
• radioimmunoassay.

The general purpose high efficiency glass microfibre filter. Particle retention to 1.6 µm. Supplied in pack quantities as indicated.

Circles and sheets. Qualitative. The most widely used grade of filter paper.

Flowrate: Retention: Wet strength: Thickness:

Medium Medium Low 0.18mm

For retaining specimen visibility (50 sheets).

Alternativa Drying pads

Circles and sheets. Qualitative. Very thick. Double the thickness of number 1.

Flowrate: Retention: Wet strength: Thickness: Ash:

Medium High High 0.39mm 0.06%

Circles. Quantitative. Ashless.

Flow rate: Retention: Wet strength: Thickness: Ash:

Medium Medium Low 0.21mm 0.007%