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1 – 15 of 109 results
1

Cytiva Whatman™ Qualitative Filter Paper: Grade 595 ½ Pleated Circles

Pleated to save time and achieve optimal fit in conical filter funnels. Whatman™ Qualitative Filter Paper: Grade 595 ½ Pleated Circles provide extra surface area to increase total loading capacity.

EDGE
Thickness (Metric) 150 μm
Pore Size 7 μm
Flow Rate Medium fast
Particle Retention 7 μm
Quantity 100 Pk.
Grade Grade 595 ½
Material Cellulose
Filtration Speed Approx. 80 s
For Use With (Application) A prepleated filter used for many routine analytical applications in different industries (e.g., particle separation from food extracts or filtration of solids from digested environmental samples, e.g., for ICP/AAS analysis).
2

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.

EDGE
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.
3

Cytiva Whatman™ Qualitative Grade Plain Circles and Sheets - Grade 3

Used for high precipitate capacity and increased wet strength. Whatman™ Qualitative Grade Plain Circles and Sheets - Grade 3 provide double the thickness of Whatman Grade 1.

EDGE
Thickness (Metric) 390 μm
Grade Grade 3
Material Cellulose
For Use With (Application) A standard grade filter used in qualitative analytical techniques to determine and identify materials. For use in büchner funnels.
4

Cytiva Whatman™ Quantitative Filter Paper: Grade 541 Circles

Recommended when fast filtration of a gelatinous precipitate for gravimetric analysis is performed on a strongly acidic or alkali solution. Whatman™ Quantitative Filter Paper: Grade 541 Circles are acid hardened cellulose filters, which reduces ash to an extremely low level.

Thickness (Metric) 155 μm
Particle Retention 22 μm
Type Quantitative Filter Paper
Format Disc
Airflow Rate 3 s/100 mL/in2
Quantity 100/Pk.
Grade Grade 541
Material Cotton Linters
Filter Type Hardened Ashless
Porosity Coarse
Filtration Speed ASTM, 12 seconds; Herzberg, 34 seconds
5

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
Pore Size 20 μm
Flow Rate Fast
Particle Retention 20 μm
Type Quantitative Filter Paper
Format Disc
Quantity 100 Pk.
Material Cotton Linters
Porosity Coarse
Filtration Speed ASTM, 12 seconds; Herzberg, 54 seconds
6

Cytiva Whatman™ Grade 54 Quantitative Filter Paper

Supports collection of coarse and gelatinous precipitates with minimal fiber shredding, even when wet. Whatman™ Grade 54 Quantitative Filter Paper has a hard, smooth surface to sustain vacuum and suction filtration.

Thickness (Metric) 185 μm
Pore Size 22 μm
Flow Rate Fast
Particle Retention 22 μm
Type Quantitative Filter Paper
Airflow Rate 3 s/100 mL/in2
Grade Grade 54
Material Cotton Linters
Filter Type Hardened Low Ash
Porosity Coarse
Filtration Speed ASTM, 10 seconds; Herzberg, 39 seconds
7

Cytiva Whatman™ Quantitative Filter Papers: Grade 542 Circles

Enables high retention of fine particles in chemically harsh conditions. Whatman™ Quantitative Filter Papers: Grade 542 Circles are well suited for use in capturing fine precipitates in applications such as metal determinations and hydroxide collection.

Thickness (Metric) 150 μm
Particle Retention 2.7 μm
Type Quantitative Filter Paper
Format Disc
Airflow Rate 64 s/100 mL/in2
Quantity 100/Pk.
Grade Grade 542
Material Cotton Linters
Filter Type Hardened Ashless
Porosity Fine
Filtration Speed ASTM, 250 seconds; Herzberg, 2510 seconds
For Use With (Application) Used in gravimetric metal determinations.
8

Cytiva Whatman™ Grade 2V Folded Qualitative Filter Papers

Saves time required to fit circles into conical funnels. Whatman™ Grade 2V Folded Qualitative Filter Papers provide medium flow and nominal particle retention rating of 8μm at a higher filtration speed.

Thickness (Metric) 190 μm
Pore Size >8 μm
Flow Rate Medium
Format Pre-pleated Circle
Quantity 100 Pk.
Grade Grade 2V
Material Cellulose
Porosity Medium Fine
Filtration Speed 240 sec.
For Use With (Application) Certified for cereal analysis methods. Normal loading capacity, limited wet strength.
10

Cytiva Whatman™ Qualitative Filter Paper: Grade 597½ Pleated Circles

Pleated to save time and achieve optimal fit in conical filter funnels. Whatman™ Qualitative Filter Paper: Grade 597½ Pleated Circles provide extra surface area to increase total loading capacity.

Thickness (Metric) 180 μm
Pore Size 4 to 7 μm
Flow Rate Medium Fast
Particle Retention 7 μm
Format Pre-pleated Circle
Quantity 100 Pk.
Grade Grade 597 ½
Material Cellulose
Filtration Speed Approx. 70 s
For Use With (Application) A prepleated filter used for a wide variety of analytical routine applications in different industries like food testing (e.g., determination of fat content) or removal of carbon dioxide and turbidity from beverages (e.g., beer analysis).
11

Cytiva Whatman™ Quantitative Filter Paper: Grade 42 Circles

Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Circles are suitable for processes that require ashing.

Thickness (Metric) 200 μm
Pore Size 2.5 μm
Flow Rate Slow
Type Quantitative Filter Paper
Format Disc
Airflow Rate 96 s/100 mL/in2
Quantity 100 Pk.
Grade Grade 42
Material Cotton Linters
Filter Type Ashless
Porosity Fine
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.
12

Cytiva Whatman™ Qualitative Filter Paper: Grade 113 Circles

Strengthened with chemically stable resin additive. Whatman™ Qualitative Filter Paper: Grade 113 Circles boast the fastest flow rate of the qualitative grades. Crepe surface promotes ultra high loading capacity.

Thickness (Metric) 420 μm
Particle Retention 30 μm
Format Disc
Quantity 100 Pk.
Grade Grade 113
Material Cellulose
Filtration Speed 1.3 s/100 mL/in2
13

Cytiva Whatman™ Grade 597 Qualitative Filter Circles

Filters carbon dioxide and turbidity during beverage analysis. Whatman™ Grade 597 Qualitative Filter Circles may also be used to determine fat content in food analysis.

Thickness (Metric) 180 μm
Pore Size 4 to 7 μm
Flow Rate Medium Fast
Particle Retention 7 μm
Format Disc
Grade Grade 597
Material Cellulose
Filtration Speed Approx. 140 s
For Use With (Application) A standard grade filter used for a wide variety of analytical routine applications in different industries like food testing (e.g., determination of fat content) or removal of carbon dioxide and turbidity from beverages (e.g., beer analysis).
14

Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles

Filters and retains coarse particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

Thickness (Metric) 210 μm
Pore Size 20 to 25 μm
Flow Rate Fast
Particle Retention 25 μm
Format Disc
Grade Grade 4
Material Cellulose
Porosity Medium
Filtration Speed 37 sec.
15

Cytiva Whatman™ Grade 44 Quantitative Filter Paper

Reduces overall ash content and the amount of time required for filtration. Whatman™ Grade 44 Quantitative Filter Paper provides faster gravimetric analysis with filter thinner material.

Thickness (Metric) 176 μm
Pore Size 3 μm
Flow Rate Medium
Particle Retention 3 μm
Type Quantitative Filter Paper
Format Disc
Airflow Rate 56 s/100 mL/in2
Quantity 100 Pk.
Grade Grade 44
Material Cotton Linters
Filter Type Ashless
Porosity Fine
Filtration Speed 995 sec.