Filter Paper
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Filter Paper
Qualitative and quantitative filter papers for the clarification and purification of samples for analysis. Available in a range of sizes, counts, grades, and formats such as circles and sheets, they are often made from cellulose or nylon.
Filter papers are familiar laboratory consumables often used with a conical funnel or similar device to filter and retain solids, particulates, and other materials from aqueous solutions, suspensions, solvents, and other liquids. Filter papers may be manufactured from natural cellulose, nylon, or glass or quartz fibers. They are typically available as pre-cut circles of various diameters, which may be folded into pleats, quadrants, or pyramids. Some filter papers are also sold as sheets or rolls that can be cut to size as needed.
Filter papers may be categorized as qualitative or quantitative. Qualitative filter papers are used for general purpose filtration applications where subsequent analysis is not critical. Quantitative filter papers (ashless papers) are intended for more exacting analytical work and may be weighed or otherwise processed after use. They are made from low-linting fibers that are typically acid-hardened during their manufacture to provide high wet strength and chemical resistance, and are pre-rinsed with demineralized water for extra purity.
Most filter papers are also graded numerically according to pore size, which in turn infers other parameters such as flow rate, retention, thickness, weight, and burst strength, that constrain and prescribe their application.
What is Filter Paper Used for?
• General applications: research laboratories, clinics, and educational settings
• Analytical applications: precipitant and particulate removal prior to further analysis or assay
• Industrial applications: foods and beverages, cosmetics, and gravimetric analysis of cements, clays, and iron and steel products
• Environmental applications: water, soil, or atmospheric sample analysis
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Filtered Search Results
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Fisherbrand™ Grade 14 Ashless Slowly Filtering Quantitative Filter Paper
Used for fine precipitates such as lead dioxide, calcium fluoride.
![EDGE](/content/dam/fishersci/glyphs/edge.png)
Thickness (Metric) | 0.15 mm |
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Pore Size | 3 to 5 μm |
Particle Retention | 3 to 5 μm |
Type | Ashless Quantitative Filter Paper |
Format | Disc |
Description | Ash Content: 0.007% |
Quantity | 100/Pk. |
Material | Cotton Linters |
Filtration Speed | 100 sec. |
Fisherbrand™ Grade 600 Cellulose General Purpose Filter Paper: Sheets
Used in schools and as bench protective paper. Fisherbrand Grade 600 Cellulose General Purpose Filter Paper is economical.
![EDGE](/content/dam/fishersci/glyphs/edge.png)
Thickness (Metric) | 0.15 mm |
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Pore Size | 10 to 20 μm |
Particle Retention | 10 to 20 μm |
Grade | 600 |
Material | Cellulose |
For Use With (Application) | Economical filter Paper used in schools and as bench protective Paper |
Fisherbrand™ Grade 122 Cellulose General Purpose Filter Paper
Very fast filtration velocity. Fisherbrand™ Grade 122 Cellulose General Purpose Filter Paper is used for all general works in laboratories.
![EDGE](/content/dam/fishersci/glyphs/edge.png)
Fisherbrand™ Grade 13 Ashless Medium Filtering Quantitative Filter Paper
Used for fine precipitates such as magnesium ammonium phosphate and calcium oxalate.
![EDGE](/content/dam/fishersci/glyphs/edge.png)
Thickness (Metric) | 0.16 mm |
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Pore Size | 5 to 8 μm |
Particle Retention | 5 to 8 μm |
Type | Ashless Quantitative Filter Paper |
Description | Ash Content: 0.007% |
Quantity | 100/Pk. |
Grade | 13 |
Material | Cotton Linters |
Filtration Speed | 50 sec. |
Thermo Scientific™ Western Blotting Filter Papers, 0.83 mm thick, 8 x 10.5 cm
Pre-cut cotton sheets for wet or semi-dry, passive or electrophoretic transfer of proteins from polyacrylamide gels to PVDF, nitrocellulose, or other membranes.
Cytiva Whatman™ Grade 54 Quantitative Filter Paper
Supports collection of coarse and gelatinous precipitates with minimal fiber shredding, even when wet. Whatman™ Grade 54 Quantitative Filter Paper has a hard, smooth surface to sustain vacuum and suction filtration.
Thickness (Metric) | 185 μm |
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Pore Size | 22 μm |
Flow Rate | Fast |
Particle Retention | 22 μm |
Type | Hardened Low Ash |
Airflow Rate | 3 s/100 mL/in2 |
Grade | Grade 54 |
Material | Cotton Linters |
Porosity | Coarse |
Filtration Speed | ASTM, 10 seconds; Herzberg, 39 seconds |
Cytiva Whatman™ Quantitative Filter Paper: Grade 41 Circles
Use for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates or for quantitative air pollution analysis. Whatman™ Quantitative Filter Paper: Grade 41 Circles are commonly used in preparing samples for metal analysis after nitric acid digestion.
![EDGE](/content/dam/fishersci/glyphs/edge.png)
Thickness (Metric) | 215 μm |
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Pore Size | 20 μm |
Flow Rate | Fast |
Format | Disc |
Quantity | 100 Pack |
Material | Cotton Linters |
Porosity | Coarse |
Filtration Speed | ASTM, 12 seconds; Herzberg, 54 seconds |
Thickness (Metric) | 350 μm |
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Flow Rate | 12 s/100mL/1.56cm2 |
Material | Glass Microfiber |
Cytiva Whatman™ Glass Microfiber Filter Paper Grade 6
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.
Thickness (Metric) | 350 μm |
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Flow Rate | Slow |
Particle Retention | <1 μm |
Grade | GF 6 |
Material | Borosilicate Glass |
Filtration Speed | 40 s/100mL/in2 |
Cytiva Whatman™ Cellulose Nitrate Membrane Filters
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.
Thickness (Metric) | 105 to 140 μm |
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Format | Disc |
Quantity | 100 Pack |
Material | Cellulose Nitrate |
Cytiva Whatman™ Glass Microfiber Filter Paper Grade 10
Strengthened with an organic binder to provide high mechanical stability. Whatman™ Glass Microfiber Filters with Binder, Grade GF 10 can be used for various applications from fine and coarse particle analysis to prefilter membranes for crop protection residues.
Thickness (Metric) | 350 μm |
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Basis Weight | 70 g/m2 |
Airflow Rate | 12 s/100mL/1.56cm2 |
Grade | GF 10 |
Material | Borosilicate Glass |
Filtration Speed | Medium |
Cytiva Whatman™ Grade 92 Glass Microfiber Filter Paper
Improves performance and longevity of equipment. Whatman™ Grade 92 Glass Microfiber Filter Paper can be used for a wide range of applications.
Thickness (Metric) | 350 μm |
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Format | Disc |
Grade | GF 92 |
Material | Borosilicate Glass |
Porosity | Medium |
Fisherbrand™ Grade 601 General Purpose Filter Papers
A filter paper used in analytical works in laboratories with medium filtration velocity.
![EDGE](/content/dam/fishersci/glyphs/edge.png)
Thickness (Metric) | 0.16 mm |
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Pore Size | 5 to 13 μm |
Format | Disc |
Quantity | 100/Pk. |
For Use With (Application) | General works, hospitals, research laboratories, schools, chemical industries, cosmetics, food and beverage industries |
Cytiva Qualitative Filter Paper: Grade 6 Circles
Filters particles twice as fast as Qualitative Filter Paper Grade 5. Qualitative Grade 6 Filters provide fine particle retention for boiler water analysis.
Thickness (Metric) | 350 μm |
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Flow Rate | 27 s/100mL/1.56cm2 |
Format | Disc |
Grade | GF 9 |
Material | Glass Microfiber |