Filter Paper
Pleated to save time and achieve optimal fit in conical filter funnels. Whatman™ Qualitative Filter Paper: Grade 595 ½ Pleated Circles provide extra surface area to increase total loading capacity.
Use for a wide range of general laboratory filtrations. MN 615 Grade Round Format Cellulose Qualitative Filter Paper provides medium fast filtration.
Covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman™ Qualitative Filter Paper: Grade 1 Circles are widely used standard grade filter papers for routine applications with medium retention and flow rates.
Captures tiny particles without becoming weak. Whatman™ Glass Microfiber Filter Paper Grade 6 may also be used for determination of filterable substances and residue upon ignition or analysis of aggressive media.
Provides excellent absorption for spilled liquids. Macherey Nagel™ Surface Protection Paper is filter paper coated on one side with polyethylene.
Filters carbon dioxide and turbidity during beverage analysis. Whatman™ Grade 597 Qualitative Filter Circles may also be used to determine fat content in food analysis.
Very fast filtration velocity. Fisherbrand™ Grade 122 Cellulose General Purpose Filter Paper is used for all general works in laboratories.
Covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman™ Qualitative Filter Paper: Grade 1 Sheets are widely used standard grade filter paper for routine applications with medium retention and flow rates.
Retains medium fine precipitates using material with virtually no ash content. Whatman™ Grade 589/2 Quantitative Filter Paper is used when medium fine precipitates are being collected and papers must be ashed to support analysis.
These filter papers are used for quantitative and gravimetric analyses as well as for pressure or vacuum filtration. They are made out of 100 % cotton linters with an α-cellulose content of > 98 % and are acid-washed to make the papers ashless and achieve high purity.
Used in schools and as bench protective paper. Fisherbrand Grade 600 Cellulose General Purpose Filter Paper is economical.
Filters and retains course particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
A thick filter paper with high loading capacity. Combines medium retention with medium-fast to fast filtration speed.
These filter papers are used for quantitative and gravimetric analyses as well as for pressure or vacuum filtration. They are made out of 100 % cotton linters with an α-cellulose content of > 98 % and are acid-washed to make the papers ashless and achieve high purity.
Manufactured under strictly controlled conditions. Whatman™ Cellulose Nitrate Membrane Filters have a noticeably improved flexibility and are made to tolerate abuse during handling, loading, and autoclaving without sacrificing integrity.
Designed for fast filtration of coarse precipitate. Whatman™ Grade 589/1 Quantitatve FIlter Paper Circles support tests such as cement fineness measurement in a standard Blaine test or determination of the ash content in foodstuffs.
Cover tables, benchtops and shelves to absorb spilled/splashed liquids. Macherey-Nagel™ MN 713 Grade Filter Paper, Folded is a smooth, thick technical filter paper with medium filtration speed for use in general lab applications and to protect surfaces from a range of substances.
A filter paper used in analytical works in laboratories with medium filtration velocity.
For fast filtering of particulates.
Cytiva Whatman Qualitative Grade Plain Circles - Grade 1, Diameter: 150 mm, for general-purpose use, air-pollution monitoring and soil chemical analysis
Suitable for qualitative analyses that require low ash content
Improves performance and longevity of equipment. Whatman™ Grade 92 Glass Microfiber Filter Paper can be used for a wide range of applications.
Captures very fine particulate samples such as insoluble molecules in fats or oils. Whatman™ Grade 589/3 Quantitative Filter Paper Circles provide accurate measurement of ash-free dry mass.
Retains and absorbs more than Grade 1 filters, with a corresponding increase in filtration time. Whatman™ Qualitative Filter Paper: Grade 2 Sheets are used for monitoring specific contaminants in the atmosphere and in soil testing.
Used for high precipitate capacity and increased wet strength. Whatman™ Qualitative Grade Plain Circles and Sheets - Grade 3 provide double the thickness of Whatman Grade 1.
Supports accurate analysis in applications sensitive to very low levels of background contamination. Whatman™ Quantitative Filter Paper: Grade 40 Circles are additionally useful in gravimetric analysis where ash content might affect weight measurements of combusted samples.
Use for chemical analysis in waste water treatment. Pleated Filter MN 615 1/4 is perfect for determination of dry matter.
Very fast filtration velocity. Fisherbrand™ Grade 122 Cellulose General Purpose Filter Paper is used for all general works in laboratories.
A general purpose filter paper used for all general works in the laboratory for excellent and consistent filtration.
Very fast filtration velocity. Fisherbrand™ Grade 122 Cellulose General Purpose Filter Paper is used for all general works in laboratories.
Filter papers are familiar consumables in the laboratory normally used with a conical funnel or similar device for the filtering and retention of solids, particulates and other contaminants from aqueous solutions, suspensions, solvents and other liquids. Filter papers are manufactured from natural cellulose linters or from glass or quartz fibres. They are available in various diameters as pre-cut plain circles, or as discs ready-folded into pleats, quadrants or pyramids for convenience and to maintain optimal, clog-free flow rates. Filter paper is also sold as sheets or rolls that can be cut to size as required.
Filter papers are described either as qualitative or quantitative. Qualitative filter papers are used for general purpose filtration applications where subsequent analytical outcomes are not critical.
Quantitative filter papers (ashless papers), are intended for more exacting analytical work. They are made from low-linting fibres that are typically acid-hardened during their manufacture to give high wet strength and chemical resistance, and are pre-rinsed with demineralised water for extra purity.
Most filter paper is also graded numerically according to pore size, which in turn infers other parameters such as flow rate, retention, thickness, weight, burst strength, and hence their nominal application.
What is filter paper used for?
- General applications in research laboratories, clinics and education
- In the analytical laboratory for removal of precipitants and particulates prior to further analysis or assay
- Industrial applications in foods, beverages, cosmetics and gravimetric analysis of cements, clays, iron and steel products
- Environmental analysis of water, soil or atmospheric samples