Macherey-Nagel glass fibre filter circles MN GF-3, binder-free, 0.6 µm (Ø 25–270 mm), 150 mm
€224.40
% Manufacturer's RRP: €272.00 17% below manufacturer's RRP
- MN GF-3 high-purity glass fibre filter circles for demanding ultra-fine filtration in the laboratory
- Binder-free borosilicate non-woven fabric reduces sample contamination and extractable residues
- Fine retention capacity of 0.6 µm, suitable for suspended solids analysis according to DIN EN 872
- Thermally resistant up to 500 °C, suitable for ashing and sterilisation
- A wide range of sizes, from 25 mm to 270 mm in diameter, for various funnel and suction filter geometries
- Cost-effective laboratory pack containing 100 filters per pack for continuous routine use
Product information "Macherey-Nagel glass fibre filter circles MN GF-3, binder-free, 0.6 µm (Ø 25–270 mm), 150 mm"
Macherey-Nagel MN GF-3 glass fibre filter circles represent a materials science-optimised and extremely high-performance system solution for demanding clarification, ultra-fine filtration and sample preparation in day-to-day laboratory work. Available in a wide range of diameters, from 25 mm for smaller syringe-top systems up to large-area 270 mm for high-volume funnel filtration, this filter series covers all scales of modern analytical work. Whether for the process-related monitoring of environmental parameters, the precise determination of suspended solids in wastewater analysis or biochemical separation processes, the structural purity of the filter medium is the primary criterion for ensuring gentle handling of materials, contamination-free operation and process reliability.
Retention and filtration kinetics thanks to binder-free borosilicate
The technological foundation of the MN GF-3 filters is based on pure borosilicate glass fibres, which are processed into a homogeneous non-woven fabric without any organic or inorganic binders. This mechanical structure achieves an extremely fine nominal retention capacity of 0.6 µm (micrometres). Despite this high retention rate for the finest precipitates and microparticles, the three-dimensional depth filtration structure is characterised by an excellent fluid-mechanical flow rate (filtration time) and a remarkable loading capacity. The risk of transient filter clogging (blockage of the flow path) in highly particulate-laden sample media is significantly minimised compared with conventional membrane filters.
Chemical resistance and thermal stability
From a chemical perspective, the pure glass fibres are largely inert towards a wide range of highly aggressive media, organic solvents, acids and alkalis (with the exception of hydrofluoric acid and highly concentrated, hot alkalis). The non-porous surface structure of the fibres prevents irreversible adsorption effects of sample components and ensures excellent gravimetric stability. Advantageous for thermal analysis: the filters remain dimensionally stable up to a temperature of 500 °C. This allows for the reliable ashing of filter residues or intensive hot-air sterilisation cycles in a drying oven.
Use in environmental analysis
The infrastructural validity of the MN GF-3 filter paper circles is particularly evident in their suitability for standardised test procedures. The quality is tailored to the demanding determination of filterable substances (suspended solids) in water and wastewater in accordance with the European standard DIN EN 872. For laboratory managers and quality management officers in a regulated environment, the specification according to DIN EN 872 provides a basis for documentation in GLP and GMP environments.
Technical details
Material science & filter structure
- Filter type: Glass fibre depth filter / filter paper circle
- Material composition: 100 % purest borosilicate glass fibres
- Binder status: 100 % binder-free (free from organic additives)
- Nominal retention capacity: 0.6 µm (micrometres)
- Grammage: approx. 50 g/m² (grams per square metre)
- Filter thickness: approx. 0.28 mm (millimetres)
Dimensions & scalability
- Available diameter range: 25 mm to 270 mm
- Common intermediate sizes in the range: 25 mm, 37 mm, 45 mm, 47 mm, 55 mm, 70 mm, 90 mm, 110 mm, 125 mm, 142 mm, 150 mm, 185 mm, 240 mm, 270 mm
- Cutting: Geometrically precise, fibre-free circular cut
Resilience & kinetics
- Thermal resistance: Up to 500 °C
- Chemical resistance: Largely inert to organic solvents, acids and typical laboratory chemicals
- Filtration speed: Very fast whilst maintaining high particle retention
- Sterilisability: Autoclavable (up to 121 °C) and suitable for hot-air sterilisation
Standards & compliance
- Environmental analysis: Ideally suited for the determination of suspended solids according to DIN EN 872
- Quality management: Supports residue-free gravimetric analyses in GLP environments
Scope of delivery
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1 x pack of Macherey-Nagel glass fibre filter circles, grade MN GF-3 (standard contents: 100 pieces per box) in the diameter selected by the customer (25 mm to 270 mm).
Individual requirements & accessories
For optimal integration of Macherey-Nagel glass fibre filters into your daily analytical routine, we offer a comprehensive range of complementary laboratory equipment. For traditional vacuum or Büchner filtration, we offer suitable porcelain Büchner funnels, robust suction flasks made of borosilicate glass, and complete multiple vacuum filtration units. For gentle, contamination-free handling of wet or dry filter discs, our range includes flat, rounded filter tweezers made from high-alloy stainless steel. For subsequent drying until a constant weight is achieved, we also offer chemically inert desiccators and Petri dishes. Please make use of our technical procurement service to design your filtration workstations to suit your specific requirements.
| Diameter: | 150 mm |
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