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

Suitable for analytical methods in breweries to filter and analyse, based upon recommended procedures of the EBC (European Brewery Convention).

• Medium fast
• Grained surface

Highly pure filter paper (approx. 0.08% ash) recommended for precise identification of materials and for sample preparation prior to sensitive detection methods. These filter papers are perfectly qualified for food control according to LFBG paragraph 64 para. 1 and 2, beverage analysis and environmental monitoring.

• Made of the same raw materials (super-refined cotton linters and cellulose) like quantitative filter papers
• High stability and durability due to alpha-Cellulose content above 95%

Ashless filters (approx. 0.004%), recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.

• Acid-washed and rinsed with water to neutralise
• Free of minerals and metallic ions, ideal for the detection of metallic ions
• For analytical applications, routine quantitative and /or gravimetric procedures
• These filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring

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

Recommended for the seperation of very fine semi-colloidal turbidities.

• Weight 196 g/m²
• High adsorption rate
• Minimum content of activated carbon 35 %
• Filtration speed acc. to Herzberg 360 s
• Thickness 0.52 mm

Recommended for the detection of very fine traces of light-coloured particles and precipitates.

• Made of pure celluloses and with constriction of black additives
• White and light-coloured particles can be detected easily by the strong contrast to the black filter paper
• Weight 95 g/m²
• Thickness 0,2 mm
• Filtration speed acc. to Herzberg 850 s

Recommended for identification of pathogens of infectious diseases by determination of the degree of resistance against antibiotics

• Made from ultrapure raw materials, entirely without additives to ensure that no inhibition will occur during the incubation
• Consistent thickness and absorption volume
• Available as small circles, even individually printed on one or both sides
• Meet the directive for carriers for active agents acc. to DIN 58940-2
• Further sizes on request

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 for blotting techniques with gels, like Southern, Northern and Western Blots, even Semidry-Blots of proteins

• Made from ultrapure cotton linters and cellulose, entirely without additives to ensure that no contamination will occur during the transfer steps
• Tested specifically for chromatographic and blotting techniques to ensure high and uniform capillary actions
• High wet strength for safe handling