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.

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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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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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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, 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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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 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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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 0858 ½ qualitative filter papers, Whatman™

Supplier: Whatman products (Cytiva)

Grained, with medium fast flow rate and medium retention. A universal filter paper, used for the filtration of extracts, oils, beer, syrups etc. Also applied in filter presses or for the aspiration of liquids.

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Application specific filter papers, grade 72, Whatman™

Supplier: Whatman products (Cytiva)

Grade 72 activated carbon air filter paper is designed for air pollution monitoring of radioactive iodine in medical and nuclear installations.

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Qualitative filter papers, wet strengthened grades, grade 93, Whatman™

Supplier: Whatman products (Cytiva)

These cellulose filter papers are intermediate in speed and retention between grades 1 and 4.

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Grade 2294 filter papers for technical use, Whatman™

Supplier: Whatman products (Cytiva)

A very thick filter card with high wet strength. Offers very high flow rate and retains medium to coarse particles.

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Qualitative filter papers, technical, smooth, grade 3 S/h

Supplier: Sartorius

These smooth filter papers are made of refined pulp and linters with more than 95% alpha-cellulose content. The ash content of these filter papers is between 0,1 and 0,15%.

Sustainable Options Available

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Filter papers for healthcare applications, grade 470, Whatman™

Supplier: Whatman products (Cytiva)

These filter papers can be used for the absorption of culture media, as a blotting paper, for electrophoresis and amino acid chromatography.

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Grade 4V qualitative filter papers, fluted, Whatman™

Supplier: Whatman products (Cytiva)

Whatman Grade 4V filter paper is well suited for qualitative analysis or general filtration of coarse particles. The fluted filter design increases filtration speed, flow rate, and loading capacity.