Filter paper, qualitative

Very smooth surface, very strong, with enhanced wet strength. Chemically stable against acids and weak alkalis, especially suited to vacuum and pressure filtration.

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%

Hardened highly pure filter papers (approx. 0.05%) with extremely high chemical and mechanical resistance, especially recommended for vacuum and pressure filtration, and for the use of acidic and alkaline solutions.

• High wet strength, easy to scrape off or wash off precipitates, no fibre release
• High resistance to aggressive chemical components, like sulphuric and nitric acids (up to 40 % at 50 °C) and alkalis (up to 10 % at 20 °C).

Hardened highly pure filter papers (approx. 0.05%) with extremely high chemical and mechanical resistance, especially recommended for vacuum and pressure filtration, and for the use of acidic and alkaline solutions.

• High wet strength, easy to scrape off or wash off precipitates, no fibre release
• High resistance to aggressive chemical components, like sulphuric and nitric acids (up to 40 % at 50 °C) and alkalis (up to 10 % at 20 °C).

Smooth, strong when wet and thick.
For relatively large volumes of liquid which are difficult to purify.

Creped, strong when wet, thin.
For viscous solutions and emulsions, such as anthracenes, gelatines, paints, thick juices and syrups.

Recommended for preparation of ordinary samples. Clarification of alcohols, essences, vinegar, essential oils, extracts, electroplating baths, flotation sludge, gelatin, glycerol, paints, lacquers, hair tonics, perfumes, tinctures, beer wort, spirits, syrups, salt solutions.

Hardened highly pure filter papers (approx. 0.05%) with extremely high chemical and mechanical resistance, especially recommended for vacuum and pressure filtration, and for the use of acidic and alkaline solutions.

• High wet strength; easy to scrape off or wash off the precipitates, no fibre release
• High resistance to aggressive chemical components, like sulphuric and nitric acids (up to 40% at 50° Celsius) and alkalis (up to 10% at 20° Celsius) and alkalis (up to 10% at 20° Celsius)

Smooth, wet strength, medium rate of filtration, eg for soil analysis.

Creped, very fast, very high wet strength, e.g. for electroplating baths.

Filter papers in a flat, pyramidal folded format. Easy and time-saving handling.

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.

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

• Hydrophilic
• Air / Gas Filtration
• 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.

• Very low ash content (0.007 % ash concentration maximum)
• Intermediate particle retention rating of 16 µm
• Herzberg filtration speed of 155 s
• Particle collection between that of Grades 40 and 41

• Accurate ash free dry mass measurements
• Fine nominal particle retention rating of 3 µm
• Filtration speed (Herzberg 995 s)
• Typical thickness of 180 µm

• Acid treated for high wet-strength and chemical resistance
• Large nominal particle retention rating of 22 µm
• Fast filtration speed (Herzberg filtration speed 39 s)
• High purity (0.015 % ash maximum)
• Compatible with Büchner funnel or Hirsch funnel applications

• High wet-strength
• High chemical resistance to strong acid and alkali suspensions
• Retention of gelatinous precipitate
• 22 µm nominal particle retention rating
• Fast flow rate (Herzberg filtration speed 34 s)
• Maximum of 0.006 % ash concentration

Suitable for Mettler-Toledo HX/HS, HC and HE series moisture analysers.

MF-Millipore™ Membranes have a biologically inert mixture of cellulose acetate and cellulose nitrate. The MF-Millipore™ filters without Triton® surfactant have a lower water extractable content compared to the standard MF-Millipore™ filters and contain a minimal amount of wetting agent.

Features & Benefits:

• Manifold filter for biological and environmental monitoring applications
• available in various pore sizes
• white or black coloured
• Freely selectable whether with or without grid surface
• Compatible with ethylene oxide, gamma irradiation and autoclave sterilization methods

White, individually sterile packed. Very low content of extractable materials. Weight constant after 60 minutes of drying at 105 °C. Suitable for residue analysis, microscopic viewing in incident or transmitted light, chemotaxis, x-ray fluorescence, spectrometry and gravimetric analysis. Autoclavable at 121 °C. Other pore sizes and formats are available on request.

White membrane with green grid, for detection of bacteria with dyed media, particle count and microscopy, individually, sterile packaged / non sterile.