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 600 Cellulose General Purpose Filter Paper: Discs
Used in schools and as bench protective paper. Fisherbrand™ Grade 600 Cellulose General Purpose Filter Paper is economical.
Thickness (Metric) | 0.15 mm |
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Pore Size | 10 to 20 μm |
Quantity | 100/Pk. |
Grade | 600 |
Material | Cellulose |
For Use With (Application) | Economical filter Paper used in schools and as bench protective Paper |
Fisherbrand™ Grade 14 Ashless Slowly Filtering Quantitative Filter Paper
Used for fine precipitates such as lead dioxide, calcium fluoride.
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 601 General Purpose Filter Papers
A filter paper used in analytical works in laboratories with medium filtration velocity.
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 |
Fisherbrand™ Grade 122 General Purpose Filter Papers
A general purpose filter paper used for all general works in the laboratory for excellent and consistent filtration.
Fisherbrand™ Grade 11 Ashless Fast Filtering Quantitative Filter Paper
Used for coarse and voluminous precipitates such as iron, aluminum and chromium hydroxides, Si-determination in steel and pig iron analysis.
Thickness (Metric) | 0.18 mm |
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Pore Size | 12 to 15 μm |
Particle Retention | 12 to 15 μm |
Type | Ashless Quantitative Filter Paper |
Description | Ash Content: 0.007% |
Quantity | 100/Pk. |
Grade | 11 |
Material | Cotton Linters |
Filtration Speed | 10 sec. |
For Use With (Application) | Used for coarse and voluminous precipitates such as Iron, Aluminum and Chromium Hydroxide, Si determination in Steel and Pig Iron analysis |
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.
Thickness (Metric) | 0.17 mm |
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Pore Size | 17 to 30 μm |
Particle Retention | 17 to 30 μm |
Grade | 122 |
Material | Cellulose |
Cytiva Whatman™ Quantitative Filter Paper: Grade 589/1 Circles
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.
Thickness (Metric) | 190 μm |
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Flow Rate | High |
Particle Retention | 12 to 15 μm |
Type | Ashless |
Format | Disc |
Color Code | Black |
Grade | Grade 589/1 |
Material | Cotton Linters |
Filtration Speed | 25 s |
For Use With (Application) | Designed for gravimetric analysis and the preparation of samples for instrumental analysis.For the filtration of coarse precipitates.For many quantitative standard methods, especially for gravimetric applications (e.g., determination of the ash content |
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.
Cytiva Whatman™ Qualitative Filter Paper: Grade 1 Circles
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.
Thickness (Metric) | 180 μm |
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Flow Rate | 57mL/min. (water) |
Particle Retention | >11 μm |
Basis Weight | 87 g/m2 |
Format | Disc |
Airflow Rate | 13sec./100mL/sq. in. |
Grade | Grade 1 |
Material | Cellulose |
Porosity | Medium |
Filtration Speed | 150 sec. |
For Use With (Application) | A widely used standard grade filter paper for routine applications with medium retention and flow rate. It covers a wide range of laboratory applications and is frequently used for clarifying liquids. |
Fisherbrand™ Grade 601 Cellulose General Purpose Filter Paper
Used in analytical works in laboratories. Fisherbrand™ Grade 601 Cellulose General Purpose Filter Paper has medium filtration velocity.
Thickness (Metric) | 0.16 mm |
---|---|
Pore Size | 5 to 13 μm |
Particle Retention | 5 to 13 μm |
Quantity | 100/Pk. |
Grade | 601 |
Material | Cellulose |
For Use With (Application) | Filter Paper used in analytical works in laboratories, medium filtration velocity |
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 |
Munktell Filtrak™ Grade 00H Quantitative Ashless Filter Papers
Recommended for use where a high purity is required for quantitative analysis.
Particle Retention | 1 to 2 μm |
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Format | Disc |
Grade | 00H |
Material | Cellulose |
Filtration Speed | 160s/10 mL |
Cytiva Whatman™ Qualitative Filter Paper: Grade 2 Circles
Retains and absorbs more than Grade 1 filters, with a corresponding increase in filtration time. Whatman™ Qualitative Filter Paper: Grade 2 Circles are used for monitoring specific contaminants in the atmosphere and in soil testing.
Thickness (Metric) | 190 μm |
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Flow Rate | Medium |
Particle Retention | >8 μm |
Format | Disc |
Quantity | 100 Pack |
Grade | Grade 2 |
Material | Cellulose |
Porosity | Medium Fine |
Filtration Speed | 240 sec. |
For Use With (Application) | A standard grade filter used for monitoring specific contaminants in the atmosphere and in soil testing. |
Cytiva Whatman™ Qualitative Grade Plain Circles and Sheets - Grade 3
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.
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Thickness (Metric) | 390 μm |
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Grade | Grade 3 |
Material | Cellulose |
For Use With (Application) | A standard grade filter used in qualitative analytical techniques to determine and identify materials. For use in büchner funnels. |
Cytiva Whatman™ Grade 589/2 Quantitative Filter Paper
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.
Thickness (Metric) | 180 μm |
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Flow Rate | Medium |
Particle Retention | 4 to 12 μm |
Type | Ashless |
Color Code | White |
Material | Cotton Linters |
Filtration Speed | 70 s |