Filter Paper
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
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 13 Ashless Medium Filtering Quantitative Filter Paper
Used for fine precipitates such as magnesium ammonium phosphate and calcium oxalate.
Thickness (Metric) | 0.16 mm |
---|---|
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.
Fisherbrand™ Grade 1101 Cellulose Technical Filter Paper
Used for filtration of fatty products and suitable for hot filtrations.
Thickness (Metric) | 0.55 mm |
---|---|
Pore Size | 38 to 75 μm |
Particle Retention | 38 to 75 μm |
Quantity | 100 Pack |
Grade | 1101 |
Material | Cellulose |
For Use With (Application) | For syrups, essential oils, varnish, resinous solutions, paints, sweetened juices, wines |
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.
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 |
Cytiva Whatman™ Quantitative Filter Paper: Grade 42 Sheets
Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Sheets are suitable for processes that require ashing.
Thickness (Metric) | 200 μm |
---|---|
Pore Size | 2.5 μm |
Particle Retention | 2.5 μm |
Type | Ashless |
Format | Sheet |
Airflow Rate | 96 s/100 mL/in2 |
Grade | Grade 42 |
Material | Cotton Linters |
Filtration Speed | 1870 sec. |
For Use With (Application) | Designed for gravimetric analysis and the preparation of samples for instrumental analysis.For critical gravimetric analysis with the finest particle retention. |
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.
Thickness (Metric) | 0.15 mm |
---|---|
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 General Purpose Filter Papers
A general purpose filter paper used for all general works in the laboratory for excellent and consistent filtration.
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 |
---|---|
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 600 Cellulose General Purpose Filter Paper
Used in schools and as bench protective paper. Fisherbrand™ Grade 600 Cellulose General Purpose Filter Paper is economical.
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 |
---|---|
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 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 |
---|---|
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 |
---|---|
Pore Size | 17 to 30 μm |
Particle Retention | 17 to 30 μm |
Grade | 122 |
Material | Cellulose |
Fisherbrand™ Grade 602 Medium Filtering Special Filter Paper
Suitable for all works in laboratories. Fisherbrand™ 602 Medium Filtering Special Filter Paper is used in filtration of various products, pharmaceutical wrapping (pills, powders, dressing bandages and tablets).
Length (Metric) | 520 mm |
---|---|
Grade | 602 |
For Use With (Application) | All works in laboratories - filtration of various products, pharmaceutical wrapping (pills, powders , dressing bandages and tablets) |
Width (Metric) | 420 mm |
Dimensions (L x W) | 520 x 420mm |