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1 – 15 of 25 results
1

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.

EDGE
Thickness (Metric) 190 μm
Flow Rate High
Particle Retention 12 to 15 μm
Type Quantitative Filter Paper
Format Disc
Color Code Black
Grade Grade 589/1
Material Cotton Linters
Filter Type Ashless
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
2

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.

EDGE
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
3

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.

EDGE
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
4

Cytiva Whatman™ Quantitative Filter Paper: Grade 40 Circles

Supports accurate analysis in applications sensitive to very low levels of background contamination. Whatman™ Quantitative Filter Paper: Grade 40 Circles are additionally useful in gravimetric analysis where ash content might affect weight measurements of combusted samples.

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EDGE
Pore Size 8 μm
Particle Retention 8 μm
Airflow Rate 21 s/100 mL/in2
Quantity 100 Pk.
Grade Grade 40
Material Cotton Linters
Filtration Speed ASTM, 75 seconds; Herzberg, 340 seconds
For Use With (Application) Designed for gravimetric analysis and the preparation of samples for instrumental analysis.Gravimetric analysis for numerous components in cements, clays, iron, and steel products.As a primary filter for separating solid matter from aqueous extracts in
Thickness (Metric) 210 μm
Flow Rate Medium
Type Quantitative Filter Paper
Format Disc
Filter Type Ashless
Porosity Medium
5

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.

EDGE
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.
6

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.

EDGE
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.
7

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.

EDGE
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
8

Cytiva Whatman™ Ashless Clippings

Enhance filtration speed by coagulating precipitates or suspensions to form thick retentive prefilter layer on top of normal filter paper.

9

Cytiva Whatman™ Grade 589/2 Quantitative Filter Paper

Retains medium fine precipitates using material with virtually no ash content. Whatman™ Grade 589/2 Quantitative Filter Paper is used when medium fine precipitates are being collected and papers must be ashed to support analysis.

EDGE
Thickness (Metric) 180 μm
Flow Rate Medium
Particle Retention 4 to 12 μm
Type Quantitative Filter Paper
Color Code White
Material Cotton Linters
Filter Type Ashless
Filtration Speed 70 s
10

Sartorius Quantitative Grade 388 Filter Papers
BIOPHARMA

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.
11

Cytiva Whatman™ Quantitative Filter Paper: Grade 50 Circles

Enables strong retention for very fine crystalline precipitates. Whatman™ Quantitative Filter Paper: Grade 50 Circles withstand shredding, wet handling, and precipitate removal by scraping.

Thickness (Metric) 115 μm
Pore Size 2.7 μm
Flow Rate Slow
Type Quantitative Filter Paper
Format Disc
Airflow Rate 144 s/100 mL/in2
Quantity 100 Pk.
Grade Grade 50
Material Cotton Linters
Filter Type Hardened Low Ash
Porosity Fine
Filtration Speed ASTM, 250 seconds; Herzberg, 2685 seconds
12

Cytiva Whatman™ Grade 52 Quantitative Filter Paper

Enables efficient precipitate recovery with acid-hardened surface and low ash content. Whatman™ Grade 52 Quantitative Filter Paper prevents fiber shredding during vacuum filtration or precipitate collection.

Thickness (Metric) 175 μm
Pore Size 7 μm
Flow Rate Medium
Particle Retention 7 μm
Type Quantitative Filter Paper
Format Disc
Airflow Rate 15 s/100 mL/in2
Quantity 100 Pk.
Grade Grade 52
Material Cotton Linters
Filter Type Hardened Low Ash
Porosity Medium
Filtration Speed ASTM, 55 seconds; Herzberg, 235 seconds
13

Cytiva Whatman™ Quantitative Filter Paper: Grade 540 Circles

Use as a gravimetric filter during analysis of metals in acidic or alkaline solutions and in the collection of hydroxides. Whatman™ Quantitative Filter Paper: Grade 540 Circles acid-treated surface prevents tearing during filtration and allows the user to scrape precipitates from the paper.

EDGE
Thickness (Metric) 160 μm
Particle Retention 8 μm
Type Quantitative Filter Paper
Format Disc
Airflow Rate 13 s/100 mL/in2
Quantity 100/Pk.
Grade Grade 540
Material Cotton Linters
Filter Type Hardened Ashless
Porosity Medium
Filtration Speed ASTM, 55 seconds; Herzberg, 200 seconds
For Use With (Application) Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis.
14

Cytiva Whatman™ Grade 43 Quantitative Filter Paper

Contains very low ash content appropriate for gravimetric analyses requiring sample combustion. Whatman™ Grade 43 Quantitative Filter Paper can be ashed during gravimetric analysis without contributing substantially to the measured weight.

Thickness (Metric) 220 μm
Pore Size 16 μm
Flow Rate Medium
Type Quantitative Filter Paper
Format Disc
Quantity 100 Pk.
Material Cotton Linters
Porosity Medium
Filtration Speed 155 sec.
15

Sartorius Quantitative Grade 389 Filter Papers
BIOPHARMA

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) 0.19 mm
Particle Retention 8 to 12 μm
Format Disc
Color Code White
Quantity 100/Pk.
Grade 389
Filtration Speed 20 sec.