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
- (3)
- (1,181)
- (9)
- (1)
- (376)
- (11)
- (121)
- (4)
- (1)
- (2)
- (1)
- (37)
- (1)
- (3)
- (17)
- (1)
- (1)
- (17)
- (97)
- (163)
- (1)
- (1)
- (1)
- (2)
- (1)
- (7)
- (8)
- (3)
- (33)
- (1)
- (2)
- (866)
- (1)
- (1)
- (15)
- (2)
- (10)
- (1)
- (2)
- (1)
- (11)
- (266)
- (9)
- (1)
- (4)
- (471)
- (2)
- (4)
- (2)
- (6)
- (4)
- (1)
- (1)
- (1)
- (3)
- (5)
- (1)
- (1)
- (2)
- (2)
- (11)
- (11)
- (1)
- (2)
- (3)
- (3)
- (7)
- (7)
- (1)
- (2)
- (10)
- (7)
- (2)
- (3)
- (1)
- (1)
- (1)
- (3)
- (8)
- (1)
- (5)
- (1)
- (6)
- (2)
- (3)
- (2)
- (20)
- (1)
- (6)
- (1)
- (4)
- (7)
- (1)
- (6)
- (3)
- (3)
- (4)
- (3)
- (2)
- (8)
- (25)
- (6)
- (1)
- (1)
- (2)
- (3)
- (10)
- (18)
- (14)
- (6)
- (12)
- (4)
- (2)
- (1)
- (2)
- (5)
- (41)
- (1)
- (3)
- (1)
- (22)
- (12)
- (41)
- (1)
- (1)
- (9)
- (1)
- (27)
- (3)
- (1)
- (109)
- (13)
- (1)
- (2)
- (25)
- (4)
- (1)
- (29)
- (3)
- (1)
- (3)
- (77)
- (1)
- (15)
- (26)
- (20)
- (10)
- (6)
- (23)
- (21)
- (12)
- (1)
- (15)
- (3)
- (62)
- (2)
- (9)
- (1)
- (13)
- (1)
- (13)
- (2)
- (4)
- (30)
- (1)
- (8)
- (1)
- (41)
- (10)
- (16)
- (131)
- (12)
- (4)
- (3)
- (14)
- (11)
- (6)
- (47)
- (10)
- (3)
- (3)
- (1)
- (30)
- (10)
- (132)
- (1)
- (1)
- (2)
- (1)
- (5)
- (25)
- (1)
- (7)
- (5)
- (5)
- (8)
- (2)
- (3)
- (1)
- (1)
- (7)
- (1)
- (1)
- (16)
- (42)
- (8)
- (8)
- (60)
- (13)
- (9)
- (1)
- (11)
- (5)
- (29)
- (2)
- (37)
- (27)
- (12)
- (15)
- (24)
- (4)
- (11)
- (7)
- (24)
- (2)
- (2)
- (6)
- (1)
- (13)
- (2)
- (1)
- (24)
- (11)
- (50)
- (63)
- (1)
- (2)
- (12)
- (4)
- (1)
- (17)
- (4)
- (1)
- (21)
- (1)
- (32)
- (3)
- (1)
- (1)
- (1)
- (1)
- (1)
- (1)
- (21)
Filtered Search Results
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 14 Ashless Slowly Filtering Quantitative Filter Paper
Used for fine precipitates such as lead dioxide, calcium fluoride.
Thickness (Metric) | 0.15 mm |
---|---|
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. |
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 |
---|---|
Format | Disc |
Quantity | 100 Pack |
Material | Cellulose Nitrate |
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 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 |
Munktell Filtrak™ Grade 00A Quantitative Ashless Filter Papers
These ashless filter papers are particularly suited for the fast filtration of fine precipitates such as calcium oxalate, magnesium ammonium phosphate and coarser forms of barium sulfate.
Particle Retention | 4 to 5 μm |
---|---|
Type | Quantitative Filter Paper |
Basis Weight | 80 g/m2 |
Format | Disc |
Description | Ashless |
Quantity | 100/Pk. |
Grade | 00A |
Material | Pure Cellulose |
Filtration Speed | 48 s/10 mL |
For Use With (Application) | Fast filtration of fine particulates |
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 |
---|---|
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 |
Cytiva Whatman™ Grade 1575 Wet-Strengthened Qualitative Filter Paper: Circle
Slow filter paper with high wet strength
Cytiva Whatman™ Glass Microfiber Filter Paper Grade 6
Captures tiny particles without becoming weak. Whatman™ Glass Microfiber Filter Paper Grade 6 may also be used for determination of filterable substances and residue upon ignition or analysis of aggressive media.
Thickness (Metric) | 350 μm |
---|---|
Flow Rate | Slow |
Particle Retention | <1 μm |
Grade | GF 6 |
Material | Borosilicate Glass |
Filtration Speed | 40 s/100mL/in2 |
Cytiva Whatman™ Nylon Membrane
For filtering aqueous solutions and most organic solvents
Sartorius Smooth Technical Filter Papers
This Smooth Technical Filter Paper grade is generally used for analytical and technical purposes.
Type | Smooth Filter Paper |
---|---|
Material (Membrane) | Cellulose |
Material | Cotton Linters, Refined Pulp |
Fit for Purpose | Certified Quality |
Sartorius Smooth Technical Filter Papers, Discs
This Smooth Technical Filter Paper grade is generally used for analytical and technical purposes.
Material (Membrane) | Cellulose |
---|---|
Material | Cotton Linters, Refined Pulp |
Munktell Filtrak™ Grade 00K Quantitative Ashless Filter Papers
These ashless filter papers are the typical grade for quantitative tasks with coarser precipitates such as lead-, iron- and silver-sulfide and calcium oxalate.
Flow Rate | Medium to slow |
---|---|
Particle Retention | 5 to 6 μm |
Type | Quantitative Filter Paper |
Basis Weight | 80 g/m2 |
Format | Disc |
Description | Ashless |
Quantity | 100/Pk. |
Grade | 00K |
Material | Pure Cellulose |
Filtration Speed | 29 s/10 mL |
For Use With (Application) | Filtration of coarser precipitates |
Munktell Filtrak™ Grade 120H Qualitative Filter Papers
These qualitative filter papers are suited for the filtration of very fine precipitates such as barium sulfate, metastannic acid and cuprous oxide.
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 |
---|---|
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. |