Qualitative Filter Paper
Made of pure cellulose treated with hydrochloric and hydrofluoric acid, filter papers are used for straining with good retention and flow rates. These cellulose filters create a semi-permeable barrier perpendicular to a liquid or airflow in order to separate fine substances from liquids or air. Different grades of filter paper are available for performing various laboratory applications including routine lab work, ranging from coarse to fine filtration of particulates. Avantor offers a wide range of qualitative and quantitative filter papers with varying pore size, particle retention, flow rate and filtration times.
Qualitative filter papers, standard grades, grade 604 ½, Whatman™
Supplier: Whatman products (Cytiva)
Grade 604½ Qualitative Filter Papers for coarse precipitates. Maintains flow rate due to the reduction in filter paper contact with funnel side and the self-supporting shape of the filter itself.
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Qualitative filter papers, wet strengthened grades, grade 91, Whatman™
Supplier: Whatman products (Cytiva)
A general purpose creped cellulose filter for less critical routine analysis. Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration.
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Grade 520 a filter papers for technical use, Whatman™
Supplier: Whatman products (Cytiva)
A thin paper with great wet strength and a very high flow rate. Frequently used in technical applications such as the filtration of viscous liquids and emulsions (e.g., sweetened juices, spirits and syrups, resin solutions, oils, or plant extracts).
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Application specific filter papers, grade 0790 ½, Whatman™
Supplier: Whatman products (Cytiva)
Acid washed cellulose filter paper with ash content of approximately 0,01%, low magnesium, for the determination of trace elements (Mg, Mn, Co, Cu, Mo, B).
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Grade 113V qualitative filter papers, fluted, Whatman™
Supplier: Whatman products (Cytiva)
Cytiva's Whatman Grade 113V creped filter paper, for use with a conical filter funnel, offers fast filtration and high loading capacity for analysis involving coarse particles or gelatinous precipitates.
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Qualitative filter papers, standard grades, grade 602 eh and 602 eh ½, Whatman™
Supplier: Whatman products (Cytiva)
Grade 602EH and 602EH½ Qualitative Filter Papers for very fine precipitates.
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Grade 602 h ½ qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
A dense prepleated filter paper for collecting very small particles and removing fine precipitates.
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VWR®, Qualitative Filter Papers
Supplier: VWR Collection
These highly pure filter paper grades are produced from cellulose fibers with an alpha-cellulose content of nearly 100%, in accordance with precise quality standards. The ash content is approximately 0.06%.
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Grade 4 qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
Whatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper. They are useful in qualitative analytical separations when fast flow is required and the collection of fine particles is not critical.
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Grade 2 qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.
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Qualitative filter papers, wet strengthened grades, grade 1573 and 1573 ½, Whatman™
Supplier: Whatman products (Cytiva)
A fast filter paper with high wet strength. It has a very smooth surface making it easy to scrape or wash off precipitate.
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Grade 1V qualitative filter paper, fluted, Whatman™
Supplier: Whatman products (Cytiva)
Whatman Grade 1V lab filter paper from Cytiva business is a widely used pre-folded filter for many general filtration applications.
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Qualitative filter papers, technical, creped
Supplier: Sartorius
These filter papers are used for routine analyses like clarification, determination of substances, but also as discs with a center hole for technical applications. Grades with a wet burst resistance >30 kPa are referred to as wet-strengthened and are therefore
suitable for pressure or vacuum filtration.
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Qualitative filter papers, Grade 2555 ½, Whatman™
Supplier: Whatman products (Cytiva)
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.
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Application specific filter papers, grade 0048, Whatman™
Supplier: Whatman products (Cytiva)
Filter mat made from a mixture of cellulose and polyester. This mat is used for optically testing baby food (artificial milk) for textile fibers.
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Grade 520 bII ½ filter papers for technical use, Whatman™
Supplier: Whatman products (Cytiva)
Grade 520bll ½ thick, pleated filter paper with high wet strength offering a very high flow rate.
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