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%

Circles. Qualitative. General purpose schools grade, creped.

Flowrate: Retention: Wet strength: Thickness:

Medium Medium High 0.205mm

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%

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.

Extremely efficient filter made to retain fine particles and micro organisms. Particle retention to 1.2 µm.

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.

• Hydrophilic, low protein binding
• Smooth surface for easy identification of particles
• Highly resistant to chemicals and good thermal stability
• Autoclavable up to 121 °C

Applications: Ideal for environmental and water analysis.

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

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

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.

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.

Thick filter made from less fibres and retaining around 3µm particles with a very high loading capacity. Extremely high speed. Particle retention to 2.7µm.

Circles. Quantitative. Ashless.

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

Medium Medium Low 0.21mm 0.007%

Circles. Quantitative. Ashless. For filtration of coarse and gelatinous precipitates. Supplied in box of 100.

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

Fast Medium Low 0.22mm 0.007%

Medium fast, 4 to 12 µm. White ribbon.

• for the analysis of foodstuffs
• for carbonates of alkaline earth metals, (NH₄)₃[P(Mo₃O₁₀)₄] x aq., Mg(NH₄)PO₄, CaC₂O₄ (hot precipitates)
• Weight: 85g/m²
• Thickness: 0.18mm

Alternativ Filter paper, qualitative, type MN 615, circles Alternativ Filter paper, quantitative, round filters

Slow < 2 µm. Blue ribbon.

• for very fine precipitates and small particles
• for soil analysis
• for BaSO₄ (hot precipitate), PbSo₄, Cu₂O, ZnS, NiS
• Weight: 84 g/m²
• Thickness: 0.16 mm

Alternativ Filter paper, qualitative, type MN 615, circles Alternativ Filter paper, quantitative, round filters

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.

This ultra-fine filter has a 98% retention efficiency for particles as small as 0.7µm in liquids. Particle retention to 0.7µm.

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

Flowrate: Retention: Wet strength: Thickness:

Medium Medium Low 0.18mm

Medium fast 4 to 7µm

• thin filter paper
• for medium to fine precipitates and general laboratory work
• Weight: 68g/m²
• Thickness: 0.150mm

Alternativ Filter paper, qualitative, type MN 615, circles Alternativ Filter Paper 595, qualitative, round filters

Fast 12 to 25µm
Black ribbon

• for coarse, high volume precipitates
• for determinations according to the German Standard Methods for the examination of water, waste water and sludge.
• most frequently used quantitative filter
• Weight: 80g/m²
• Thickness: 0.19mm

Alternativ Filter paper, qualitative, type MN 615, circles Alternativ Filter paper, quantitative, round filters

Qualitative. Folded (pre-pleated) version of Number 2.

Flowrate: Retention: Wet strength: Thickness: Ash:

Medium Medium Low 0.19mm 0.06%

Nitrocellulose membranes with a 0.2 µm pore size, offering excellent sensitivity, resolution and low background for Western blot protocols.

Features & Benefits:

• Low background and excellent signal-to-noise ratios, without the need for stringent washing conditions
• Compatible with a variety of Western blot labeling and detection systems
• Risk of ”blow-through“ reduced by high binding capacity of small proteins (< Mr 20 000)
• Optimized for chemiluminescent and fluorescent detection
• Long shelf life of bound proteins to the transfer membrane

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.

Circles. High retention at high flow rates. Widely used in water pollution monitoring techniques for suspended solids, and is specified in US Method 934-AH. Particle retention to 1.5µm.

The upper side consists of a particularly absorbent filter paper, the lower side is a non-permeable, chemically resistant PE layer. This combination makes Benchkote into a protective paper with a particularly high wet strength for universal use, helping to meet the requirements of Good Laboratory Practice (GLP):

• Completely absorbs escaped liquids
• Prevents spills from reaching the workbench
• Protects against contamination

Applications:

• Surface protection for lab workbenches, trays or chemical cabinets
• Contamination protection, e. g. in isotope or bacteriological labs
• Adsorption of toxic or radioactive substances
• Hygienic protection in animal cages
• Atmospheric regulation in humidity chambers

Alternativ Bench protection paper, LabSorb Alternativ Bench protector, Labmat™

Versatile use - ready-to-use filter units with a hydrophilic,
low protein-binding membrane made of regenerated cellulose.
First class chemical resistance against the usual aqueous
and organic HPLC solvents

• Spartan^®13 and 30 are tested and certified for UV absorbance substances at wavelengths of 210nm and 254nm with water, methanol and acetonitrile;
• Spartan^® 13 has an extremely low hold up volume; <10µl, for optimal filtration

Applications:
Ideal for HPLC sample preparation to achieve reproducible results. Carefully controlled manufacture guarantees lowest traces of UV- absorbing, extractable components.

Alternativ Syringe filters, disposable, ReZist®PTFE

Manufactured in pure cellulose according to DIN 12449.

Alternativ Filter paper, qualitative, type MN 615, circles Alternativ Extraction thimbles, Cellulose Alternativ Extraction Thimbles, cellulose

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.

Manufactured from quartz microfibre to withstand high temperatures. Can be used up to 500°C.

Flow rate: Retention: Wet strength: Thickness:

Fast Medium High 0.475mm

Circles. Quantitative. Ashless. For filtration of fine precipitates.

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

Slow High Low 0.20mm 0.007%