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1 – 15 of 109 results
1

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.
2

Cytiva Whatman™ Qualitative Filter Paper: Grade 2 Circles

Retains and absorbs more than Grade 1 filters, with a corresponding increase in filtration time. Whatman™ Qualitative Filter Paper: Grade 2 Circles are used for monitoring specific contaminants in the atmosphere and in soil testing.

EDGE
Thickness (Metric) 190 μm
Flow Rate Medium
Particle Retention >8 μm
Format Disc
Quantity 100 Pk.
Grade Grade 2
Material Cellulose
Porosity Medium Fine
Filtration Speed 240 sec.
For Use With (Application) A standard grade filter used for monitoring specific contaminants in the atmosphere and in soil testing.
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.

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™ Kjeldahl Analysis Weighing Paper, Grade B-2

Dissolves residue-free in acid solution, which is critical in applications such as Kjeldahl analysis of nitrogen in soil. Whatman Kjeldahl Analysis Weighing Paper, Grade B-2 is thin, lightweight, and low in nitrogen for accurate chemical analysis.

EDGE
Thickness (Metric) 0.04 mm
Format Sheet
Quantity 500 Pk.
Grade B-2
Material Parchment Paper
6

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
7

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
8

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).
9

Cytiva Whatman™ Qualitative Filter Paper: Grade 6 Circles

Filters particles twice as fast as Whatman Qualitative Filter Paper Grade 5. Whatman™ Qualitative Grade 6 Filters provide fine particle retention for boiler water analysis.

EDGE
Thickness (Metric) 180 μm
Flow Rate Medium to slow
Particle Retention 3 μm
Format Disc
Quantity 100 Pk.
Grade Grade 6
Material Cellulose
Porosity Fine
Filtration Speed Herzberg 715 sec.
For Use With (Application) A standard grade filter for boiler water analysis.
10

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
11

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.

EDGE
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.
12

Cytiva Grade GF/A Filter for Personal Air Samplers

These aerosol sampling and particulate monitoring filters provide high flow rates and minimal sample interference. Cytiva Whatman Grade GF/A card-mounted filters are used in static sample and personal air sampler applications.

EDGE
13

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.

EDGE
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.
14

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.
15

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.