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 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 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. |
Thickness (Metric) | 0.3 mm |
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Pore Size | 12 to 16 μm |
Particle Retention | 12 to 16 μm |
Quantity | 100 Pack |
Grade | 1103 |
Material | Cellulose |
For Use With (Application) | For dyes, Ether, Alcoholic solutions, Eaux de Cologne, salted solutions, vegetal extracts, hair solutions, perfumes, tinctures, saccharine juices, vinegar |
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 |
Sartorius Quantitative Grade 391 Filter Papers
Used for quantitative and gravimetric analyses, as well as for pressure or vacuum filtration. Sartorius Qualitative Grade 391 Filter Papers are made of 100% cotton linters with an α-cellulose content of >98%.
Thickness (Metric) | 0.15 mm |
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Particle Retention | 2 to 3 μm |
Basis Weight | 84 g/m2 |
Color Code | Blue |
Quantity | 100/Pk. |
Grade | 391 |
Material | Cotton Linters |
Filtration Speed | 180 sec. |
For Use With (Application) | quantitative and gravimetric analyses, pressure or vacuum filtration |
Sartorius™ Smooth Folded Filters, Grade 3-HW
Use for routine qualitative analyses in the lab. Sartorius™ Smooth Folded Filters, Grade 3-HW are wet-strengthened for use in pressure and vacuum filtration. Ultra-pure filter paper is available as a folded filter cone in a variety of diameters.
Thickness (Metric) | 0.14 mm |
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Particle Retention | 8 to 12 μm |
Type | Qualitative, Technical, Smooth |
Format | Folded |
Quantity | 100 Pack |
Grade | 3HW |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 20μm/sec. |
For Use With (Application) | For qualitative-technical analyses, used for routine analyses like clarification, determination of substances, but also as discs with a center hole for technical applications |
Sartorius Stedim Biotech™ Grade 388 Quantitative Papers, Folded
Sartorius Stedim Biotech™ Grade 388 Quantitative Papers, Folded are suitable for quantitative and gravimetric analyses as well as for pressure or vacuum filtration.
Thickness (Metric) | 0.21 mm |
---|---|
Particle Retention | 12 to 15 μm |
Basis Weight | 84 g/m2 |
Format | Folded |
Quantity | 100/Pk. |
Grade | 388 |
Material | 100% Cotton Linters (>98%alpha-cellulose, Ash-free) |
Filtration Speed | 10 sec. |
Macherey-Nagel™ MN 615 Grade Round Format Cellulose Qualitative Filter Paper
Use for a wide range of general laboratory filtrations. MN 615 Grade Round Format Cellulose Qualitative Filter Paper provides medium fast filtration.
Thickness (Metric) | 0.16 mm |
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Type | Filter Paper |
Format | Disc |
Quantity | 100 Pack |
Grade | MN 615 |
Material | Cellulose |
Filtration Speed | Medium fast |
For Use With (Application) | Qualitative analysis |
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™ QM-C Quartz Filter Paper, Circles
For heavy metal analysis of particulate matter and air quality monitoring
Thickness (Metric) | 475 μm |
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Type | Quartz Filter Paper |
Basis Weight | 85 g/m2 |
Format | Disc |
Airflow Rate | 19 s/100 mL/in2 |
Temperature (Metric) Max | 1200°C |
Grade | Grade QM-C |
Material | Silica |
Macherey-Nagel™ MN 640 w Grade Ashless Filter Papers, Round
Acid-washed with an extremely low ash content of <0.01% for quantitative analysis and gravimetric applications. Macherey-Nagel™ MN 640 w Ashless Filter Papers, Round are smooth-surface filter papers that perform fast filtrations of coarse particulates.
Fisherbrand™ Grade 113 Cellulose Medium Filtering Qualitative Filter Paper
Filters fine particulates.
Thickness (Metric) | 0.16 mm |
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Pore Size | 5 to 8 μm |
Particle Retention | 5 to 8 μm |
Description | Ash Content: 0.06% |
Quantity | 100 Pack |
Grade | 113 |
Material | Cellulose |
For Use With (Application) | Suitable for fast filtration of liquids with fine particle |
Thickness (Metric) | 0.2 mm |
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Pore Size | 12 to 15 μm |
Particle Retention | 12 to 15 μm |
Description | Ash Content: 0.06% |
Quantity | 100 Pack |
Grade | 111 |
Material | Cellulose |
For Use With (Application) | For coarse and voluminous precipitates like Hydroxides and Sulphides |
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.
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. |