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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.
Thickness (Metric) | 150 μm |
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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). |
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 |
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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). |
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 |
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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 |
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 |
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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. |
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.
Thickness (Metric) | 190 μm |
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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. |
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 |
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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 |
Cytiva Whatman™ Qualitative Filter Paper: Grade 2 Sheets
Retains and absorbs more than Grade 1 filters, with a corresponding increase in filtration time. Whatman™ Qualitative Filter Paper: Grade 2 Sheets are used for monitoring specific contaminants in the atmosphere and in soil testing.
Thickness (Metric) | 190 μm |
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Flow Rate | Medium |
Particle Retention | >8 μm |
Format | Sheet |
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. |
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 |
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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 |
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.
Thickness (Metric) | 390 μm |
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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. |
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.
Pore Size | 8 μm |
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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 |
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 |
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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. |
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 |
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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 |
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.
Thickness (Metric) | 0.04 mm |
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Format | Sheet |
Quantity | 500 Pk. |
Grade | B-2 |
Material | Parchment Paper |
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 |
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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. |
Cytiva Whatman™ Qualitative Filter Papers: Grade 2555½ Pleated Circles
Maintains flow rate with reduced contact between filter and funnel. Whatman™Grade 2555½ Pleated Circles are medium fast filter papers used for the filtration of the mash for the determination of the extract in malt and wort and for removing carbon dioxide from beer.
Thickness (Metric) | 170 μm |
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Particle Retention | 12 μm |
Type | Qualitative Filter Paper |
Format | Pre-pleated Circle |
Grade | Grade 2555 ½ |
Material | Cellulose |
Filtration Speed | Approx. 55 s |
For Use With (Application) | A medium fast filter paper used for the filtration of the mash for the determination of the extract in malt and wort and for removing carbon dioxide from beer. |