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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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 |
Sartorius™ Smooth Folded Filters, Grade 3-HW
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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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 |
---|---|
Particle Retention | 8 to 12 μm |
Type | Qualitative Filter Paper |
Format | Folded |
Quantity | 100 Pk. |
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™ Ash-free Quantitative Filter Papers, Grade 391
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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Used for quantitative and gravimetric analyses as well as for pressure or vacuum filtration.
Thickness (Metric) | 0.15 mm |
---|---|
Particle Retention | 2 to 3 μm |
Type | Quantitative Filter Paper |
Quantity | 100 Pk. |
Grade | 391 |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 180μm/sec. |
For Use With (Application) | Suitable for quantitative analysis, Buchner funnels, pressure or vacuum filtration |
Sartorius Stedim Biotech™ Grade 1289 Qualitative Papers, Discs
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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Sartorius Stedim Biotech™ Grade 1289 Quantitative Papers, Discs are suitable for analytical purposes and routine analyses whenever no gravimetric analyses are required.
Thickness (Metric) | 0.21 mm |
---|---|
Particle Retention | 8 to 12 μm |
Basis Weight | 84 g/m2 |
Format | Disc |
Quantity | 100/Pk. |
Grade | 1289 |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 20 sec. |
Sartorius™ Smooth Filter Paper Discs, Grade 3-HW
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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Use for routine qualitative analyses and technical applications. Sartorius™ Smooth Filter Paper Discs, Grade 3-HW can be used for pressure and vacuum filtration. Ultra-pure filters are available in filter disc format in a variety of diameters.
Thickness (Metric) | 0.14 mm |
---|---|
Particle Retention | 8 to 12 μm |
Type | Qualitative Filter Paper |
Format | Disc |
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 Quantitative Grade 391 Filter Papers
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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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 |
---|---|
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 Stedim Biotech™ Grade 1291 Qualitative Papers, Folded
Sartorius Stedim Biotech™ Grade 1291 Qualitative Papers, Folded are suitable for analytical purposes and routine analyses whenever no gravimetric analyses are required.
Sartorius™ Grade 1291 Wet-strengthened Folded Filter Qualitative Filter Papers
Used for analytical purposes and routine analyses, whenever no gravimetric analyses are required
Thickness (Metric) | 0.16 mm |
---|---|
Particle Retention | 2 to 3 μm |
Type | Qualitative Filter Paper |
Format | Folded |
Quantity | 100/Pk. |
Grade | 1291 |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 180μm/sec. |
For Use With (Application) | Used for analytical purposes and routine analyses, whenever no gravimetric analyses are required |
Fisherbrand™ Grade 115 Cellulose Very Slowly Filtering Qualitative Filter Paper
Fisherbrand™ Grade 115 Cellulose Very Slowly Filtering Qualitative Filter Paper are made of cellulose fibers.
Thickness (Metric) | 0.14 mm |
---|---|
Pore Size | 2 to 3 μm |
Quantity | 100/Pk. |
Fisherbrand™ Grade 55 Ashless Hardened Quantitative Filter Paper
Suitable for wide range of analytical applications.
Thickness (Metric) | 0.14 mm |
---|---|
Pore Size | 2 to 3 μm |
Particle Retention | 2 to 3 μm |
Type | Quantitative Filter Paper |
Format | Disc |
Description | Ash Content: 0.007% |
Quantity | 100/Pk. |
Grade | 55 |
Material | Refined Cellulose, Cotton Linters |
Filter Type | Hardened Ashless |
Filtration Speed | 180 sec. |
For Use With (Application) | Used for Acid solutions analysis and for filtration under high pressure |
Sartorius Quantitative Grade 388 Filter Papers
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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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.
Thickness (Metric) | 0.21 mm |
---|---|
Particle Retention | 10 to 15 μm |
Format | Disc |
Color Code | Black |
Quantity | 100/Pk. |
Grade | 388 |
Filtration Speed | 10 sec. |
Sartorius Quantitative Grade 1289 Filter Papers
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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These qualitative filter papers are essentially used for analytical purposes and routine analyses, whenever no gravimetric analyses are required. They are wet-strengthened and can be used for pressure and vacuum filtration.
Thickness (Metric) | 0.21 mm |
---|---|
Format | Disc |
Quantity | 100/Pk. |