Glass-fibre filters

The glass fibre filters from LABSOLUTE® are made of borosilicate glass without binder and are thus biologically inert. The filters provide a high retention power and simultaneously enable elevated flow rates, which makes them applicable for almost every area of laboratory filtration. Among other things, they are used for clarification of protein solutions, air or water monitoring and for gravimetric and waste water analyses. Furthermore, they can be ideally used as prefilters for membranes.

• Very high resistance to almost all kinds of chemicals
• Temperature-resistant up to 500 °C
• Autoclavable up to 134 °C

• Thickness: 0.26 mm
• Weight: 52 g/m²

The glass fibre filters from LABSOLUTE® are made of borosilicate glass without binder and are thus biologically inert. The filters provide a high retention power and simultaneously enable elevated flow rates, which makes them applicable for almost every area of laboratory filtration. Among other things, they are used for clarification of protein solutions, air or water monitoring and for gravimetric and waste water analyses. Furthermore, they can be ideally used as prefilters for membranes.

• Very high resistance to almost all kinds of chemicals
• Temperature-resistant up to 500 °C
• Autoclavable up to 134 °C

• Thickness: 0.26 mm
• Weight: 53 g/m²

The glass fibre filters from LABSOLUTE® are made of borosilicate glass without binder and are thus biologically inert. The filters provide a high retention power and simultaneously enable elevated flow rates, which makes them applicable for almost every area of laboratory filtration. Among other things, they are used for clarification of protein solutions, air or water monitoring and for gravimetric and waste water analyses. Furthermore, they can be ideally used as prefilters for membranes.

• Very high resistance to almost all kinds of chemicals
• Temperature-resistant up to 500 °C
• Autoclavable up to 134 °C

• Thickness: 0.45 mm
• Weight: 75 g/m²

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.

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.

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.

Suitable for analytical and gravimetric analyses, as well as a pre-filter.

• Hydrophilic
• Liquid Filtration
• Non-sterile

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.

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.

Can be used up to a maximum of 200 °C. With organic binder.

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.

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.

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.

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.

Recommended filters for environmental analysis and controlling both air and water pollution.

• Made of 100 % borosilicate glass fibres with binders
• Glass fibre filters capture fine particles down to 1 µm from liquids, in air, gases and aerosols with even 0.3 to 0.5 µm being absorbed
• Extremely low content in alkali-earth metals
• Chemical stability: It keeps all its properties in contact with acid solutions (except hydrofluoric acid) and basic solutions at moderate concentrations
• Stabile at temperatures up to 500 °C
• Gravimetrical analysis of organic and inorganic impurities in water and waste water according to DIN 38409 and EN 872 (suspended particles)
• Measurement of immission, measurement of dust in air and gases, monitoring of the efficiency of filtration and dedusting, monitoring the combustion air of power plants and of the steel and iron industry
• Measurement of dust release in workplace and production processes and the purification of compartment air
• Measurement of scintillation

Recommended filters for controlling both air and water pollution.

• Made of 100 % borosilicate glass fibres without binders
• Extremely low content in alkali-earth metals
• Chemical stability: It keeps all its properties in contact with acid solutions (except hydrofluoric acid) and basic solutions at moderate concentrations
• Usable as a pre-filter for membranes to prevent the membranes from silting up
• Deposition of (radioactive) aerosols and monitoring of nuclear power plants
• Gravimetrical analysis of organic and inorganic impurities in water and waste water according to DIN 38409 and EN 872 (suspended particles)
• Measurement of immission, measurement of dust in air and gases, monitoring of the efficiency of filtration and dedusting, monitoring the combustion air of power plants and of the steel and iron industry
• Measurement of dust release in workplace and production processes and the purification of compartment air
• Stability at high temperatures: It keeps its properties up to 500 °C
• High flow speed and high permeability to air

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.

• Gas-/air-monitoring
• Water and waste water determination

The standard glass fibre pre-filter, placed directly on top of the membrane filter. With acrylic latex binder (4% to 6%, determined by ashing).

Type
A: standard glass fiber filter
B: extra thick glass fiber filter
C: binder-free glass fiber filter

This binder free paper offers fine particle retention, high flow rate and good loading capacity. it is used for high efficiency laboratory filtration as well as air sampling. This filter is stable up to +500 °C.

Can be used up to a maximum of 500 °C. Without binders.

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.

Recommended filters for atmospheric pollution control and for particles determination at high temperatures.

• Filters made of pure quartz microfibre (SiO₂), free of binding elements or additives
• Extremely low content in alkali-earth metals
• Determination of suspended particles (SPM and TSP) in ambient air acc. to the directive of the US EPA (Environmental Protection Agency) and the EN 23210
• Retention: Excellent retention of very fine particles through the adsorption mechanisms of quartz fibres
• Chemical stability: excellent stability with hardly any loss of filter-material due to chemical reactions under extreme conditions with acid gases (HCl, SO₂, SO₃, H₂SO₄, NO and NO₃)
• Resistance to chemical reagents: excellent resistance to solvents, acids (except HF) and alkaline substances
• Stability at high temperatures: higher resistance than glass microfiber, up to 1000 °C
• Weight: 85 g/m²
• Thickness: 0.45 mm

Recommended filters for environmental analysis and controlling both air and water pollution.

• Made of 100 % borosilicate glass fibres with binders
• Extremely low content in alkali-earth metals
• Chemical stability: It keeps all its properties in contact with acid solutions (except hydrofluoric acid) and basic solutions at moderate concentrations
• Measurement of dust release in workplace and production processes and the purification of compartment air
• Stable up to 180 °C for GF 10
• High flow speed and high permeability to air
• Suitable as filter belt measuring instruments and automats for air filtration and analysis
• Separation of soot, oil mist and suspended particles

The glass fiber filters are available with and without binder resins and can be sterilized by ethylene oxid, gamma irridation or in the autoclave.

Glass fiber filters without binding resin:

• Maintain their structural integrity to 500 °C without weight loss when heated
• For gravimetric analysis
• For the filtration of hot gases
• Type APFA/APFB/APFC/APFDAPFF/AP40

Suitable for analytical and gravimetric analyses, as well as a pre-filter.

• Hydrophilic
• Air / Gas Filtration
• Liquid Filtration
• Non-sterile

Glass microfibre filters are designed for prefiltration in order to protect against membrane fouling. Grade GF 92 is strengthened with an inorganic binder.

• Increased strength
• Temperature resistant up to 500 °C
• Medium filtration speed

The glass fiber filters are available with and without binder resins and can be sterilized by ethylene oxid, gamma irridation or in the autoclave.

Glass fiber filter with binding resin:

• Superior wet strength
• Qualitative analysis and prefiltration, especially for highly contaminated solutions
• To clarify aqueous solutions
• Type AP15/20/25

These glass microfiber filters are made from borosilicate glass and strengthened with an organic binder to provide high mechanical stability.

• Temperature resistance up to 180 °C
• Medium filtration speed
• Can be used as a roll filter in automated applications

• Hydrophilic
• Air / Gas Filtration
• Liquid Filtration
• Prefiltration
• Non-sterile

• Resistant to temperatures up to +500 °C
• Analysis of hot and acidic gases, including emission control and smoke stack gas monitoring
• Soxhlet extraction
• Analysis of pesticide residues
• Determination of oil/fat content of foods
• Analysis of oil and grease in solid wastes

Recommended filter for fast clarification of aqueous solutions and controlling water pollution.

• Made of 100 % borosilicate glass fibres with organic binder
• Chemical stability: It keeps all its properties in contact with acid solutions (except hydrofluoric acid) and basic

• High flow speed and high permeability to air
• Stabile up to 180°C
• Suitable as filter belt measuring instruments and automats for air filtration and analysis
• Fast clarification of aquous solutions and degassing of acidulous solutions

Grade GF/C is pre-rinsed and dried, grade GF/C RTU is additionally pre-treated with washing, drying, cooling (in a desiccator) and weighing steps, aligned to the requirements of EN 872. It is certified that these filters have weight loss of less than 0.017 mg/cm² after preparation, which is required by the standard. Each grade GF/C RTU ready-to-use filter is placed in an individually barcoded aluminum pan that notes the filter weight. Each box contains an additional box ID and barcode that can be used to download the weights of all 100 pans in that box.

Applications: For cell harvesting, liquid scintillation counting and binding assays, especially suitable for use in applications involving air filtration and for gravimetric analysis of volatile materials where ignition is involved.

Pre-washed, dried or ignited, cooled and weighed Glass Microfibre filters, which eliminate the pre-treating steps that are otherwise required by the US EPA Laboratory Standard Method 2540 parts C, D, and E. These glass microfiber filter papers also have fine particle retention of 1.5 µm at high flow rates to process heavy, turbid samples.
Each ready-to-use filter is placed in an individually barcoded aluminum pan that notes the filter weight. Each box contains an additional box ID and barcode that can be used to download the weights of all 100 pans in that box.

Solids: For suspended and dissolved solids. Pre-washed, dried, cooled, and weighed filters with certified mass loss between washing and drying steps of the lesser of less than 0.5 mg or 4% in accordance with US EPA Lab Standard Method 2540 parts C and D.
Solids, double weigh: As Solids additionally the drying, cooling and weighing steps are repeated twice for highest regulatory concerns.
Volatiles: For volatile substances. Pre-weighed. Aligned to US EPA Laboratory Standard Method 2540 parts C, D, and E
Volatiles, ignited: As Volatiles but pre-washed and pre-fired at 550 °C instead of pre-weighed.

Applications: To be used for solid analysis as well as a wastewater filter for a wide range of water monitorings.

For emission control.

• Hydrophilic
• Air / Gas Filtration
• Non-sterile

The stacked-disk format of Millipak® filter units eliminates the risk of fiber release from downstream support material.

Features & Benefits:

• No risk of membrane cracking as the 0.22 µm membrane is supported by a rigid plastic disc with channels
• As the membranes are welded onto the support disc, the risk of contamination is considerably reduced
• Minimum dead volume thanks to the large filter surface

• Available as a round filter or sheet
• Temperature resistance up to max. 900 °C
• Each batch is checked and certified for trace elements
• Made from micro-quartz fibers of extreme purity, binder-free
• Especially good with small amounts of particles