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
Sartorius™ Sartorius Ash-free Color Coded Quantitative Filter Papers, Grade 388
Used for quantitative and gravimetric analyses as well as for pressure or vacuum filtration
Thickness (Metric) | 0.21 mm |
---|---|
Particle Retention | 12 to 15 μm |
Type | Quantitative Filter Paper |
Quantity | 100/Pk. |
Grade | 388 |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 10μm/sec. |
For Use With (Application) | Suitable for quantitative analysis, Buchner funnels, 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 |
---|---|
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 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 |
---|---|
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™ Wet-Strengthened Filter Paper Discs, Grade 1289
Use for routine qualitative analyses, when no gravimetric analyses is required. Sartorius™ Wet-Strengthened Filter Paper Discs, Grade 1289 can be used for pressure and vacuum filtration. Ultra-pure filters are available in filter disc format in a variety of diameters.
Thickness (Metric) | 0.21 mm |
---|---|
Particle Retention | 8 to 12 μm |
Type | Qualitative Filter Paper |
Format | Disc |
Quantity | 100 Pack |
Grade | 1289 |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 20μm/sec. |
For Use With (Application) | Used for analytical purposes and routine analyses, whenever no gravimetric analyses are required |
Sartorius Stedim Biotech™ Grade 1289 Qualitative Papers, Discs
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 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. |
Sartorius™ Smooth Filter Paper Discs, Grade 3-HW
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, Technical, Smooth |
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 Stedim Biotech™ Grade 393 Quantitative Papers, Discs
Sartorius Stedim Biotech™ Grade 393 Quantitative Papers, Discs are suitable for quantitative and gravimetric analyses as well as for pressure or vacuum filtration.
Thickness (Metric) | 0.17 mm |
---|---|
Particle Retention | 1 μm |
Basis Weight | 100 g/m2 |
Format | Disc |
Quantity | 100/Pk. |
Grade | 393 |
Material | 100% Cotton Linters (<98% alpha-cellulose; ash-free) |
Filtration Speed | 300 sec. |
Sartorius™ Grade 6 Smooth Surface Folded Filter Qualitative Filter Papers
Used for analytical and technical purposes.
Thickness (Metric) | 0.17 mm |
---|---|
Type | Qualitative Filter Paper |
Quantity | 100 Pack |
Grade | 6 |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 15μm/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 388 Filter Papers
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
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. |
Sartorius Stedim Biotech™ Grade 292 Qualitative Papers, Discs
Sartorius Stedim Biotech™ Grade 292 Qualitative Papers, Discs are especially suitable for qualitative analyses that require a low ash content.
Thickness (Metric) | 0.18 m |
---|---|
Particle Retention | 5 to 8 μm |
Basis Weight | 87 g/m2 |
Format | Disc |
Quantity | 100/Pk. |
Grade | 292 |
Filtration Speed | 45 sec. |
Sartorius Quantitative Grade 393 Filter Papers
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) | 0.18 mm |
---|---|
Particle Retention | 1 to 2 μm |
Format | Disc |
Quantity | 100/Pk. |
Grade | 393 |
Filtration Speed | 250 sec. |
Sartorius™ Grade 293 Wet-strengthened Folded Filter Qualitative Filter Papers
Used for analytical purposes and routine analyses, whenever no gravimetric analyses are required
Thickness (Metric) | 0.15 mm |
---|---|
Particle Retention | 1 to 2 μm |
Type | Qualitative Filter Paper |
Format | Folded |
Quantity | 100/Pk. |
Grade | 293 |
Material | Cotton Linters, Refined Pulp |
Filtration Speed | 300μm/sec. |
For Use With (Application) | Used for analytical purposes and routine analyses, whenever no gravimetric analyses are required |
Sartorius Stedim Biotech™ Grade 389 Quantitative Papers, Discs
Sartorius Stedim Biotech™ Grade 389 Quantitative Papers, Discs are suitable for quantitative and gravimetric analyses as well as for pressure or vacuum filtration.