Filter Papers
Made of pure cellulose treated with hydrochloric and hydrofluoric acid, filter paper is quantitative paper used for straining with fast flow rates and good retention. It creates 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 routine laboratory work, ranging from coarse to fine filtration of particulates.
Paper boards for filtration and absorption of liquids
Supplier: Sartorius
These paper boards are used for the filtration of cooking and transformer oils, galvanic baths and as base paper for further impregnation with certain reagents. They are made of refined pulp or cotton linters.
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Qualitative filter papers, technical, smooth, grade 6
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%.
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Seed testing papers, pleated paper
Supplier: Sartorius
These papers satisfy the requirements for the determination of germination capability according to ISTA (International Seed Testing Association) and are ideal for ensuring optimal moisture content for the most diverse types of seeds and germination forms.
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Filter paper for special applications
Supplier: Ahlstrom
These filter papers for suitable for special applications.
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High purity qualitative filter paper
Supplier: Ahlstrom
These qualitative grades of filter paper are recommended for use in analytical methods which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance. These filter papers cover a wide range of laboratory applications, as liquids clarification, qualitative analytical separations for precipitates and buffers filtration, and are also used for soil analysis and in food and beverage testing. Wet-strengthened grades contain a reinforcement agent that increases their resistance to rupture when wet, such as in vacuum filtration, and their resistance when filtering acidic solutions.
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Seed testing papers, Munktell
Supplier: Ahlstrom
Seed Testing Papers are widely used by seed testing institutes and others for germination capacity testing and for health tests e.g. Jacobsen (Copenhagen tank), on top of paper and osmosis test.
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Industrial Filter Papers
Supplier: Ahlstrom
The following filter papers fulfill specific technical requirements corresponding to the requirements mentioned overleaf. Embossed filter papers have a larger surface area and, therefore, correspondingly shorter filtration times. They show a very homogenous and fine pore structure.
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Cellulose chromatography papers
Supplier: Sartorius
Chromatography papers are not only ideal for chromatography, but also for routine and repetitive separations, routine analysis of proteins in serum (e.g. human albumin) and several absorption applications like those common in the life sciences and diagnostics. They are made of cotton linters with more than 98% alpha-cellulose content and <0,04% ash content.
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Phase separating paper, grade 480
Supplier: Sartorius
This phase separating paper is impregnated with stabilised silicon, thus rendering it hydrophobic and it retains water, but allows solvents to flow through. The flow stops automatically when the entire solvent has passed through, this eliminates the need to use separating funnels.
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Qualitative filter papers, technical, smooth, grade 3 w
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%.
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Low-Ash Hardened Quantitative Filter Papers
Supplier: Ahlstrom
Ahlstrom-Munksjö manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, deionised water and are further treated with dilute acid to remove any remaining organic and inorganic impurities. All quantitative grades are manufactured in a strictly controlled environment that ensures high uniformity and high purity from filter to filter.
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General purpose qualitative filter papers
Supplier: Ahlstrom
Ahlstrom-Munksjö’s qualitative grades of filter paper are recommended for use in analytical methods which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance. These filter papers covers a wide range of laboratory applications, as liquids clarification, qualitative analytical separations for precipitates and buffers filtration, and are also used for soil analysis and in food and beverage testing. Standard qualitative filter papers are suitable for quadrant folded or gravity flow applications.
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Qualitative and technical filter papers, grade MN 514 ¹/₄
Supplier: MACHEREY-NAGEL
Filter paper, qualitative, Grade MN 514 ¹/₄, 320 mm
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Quantitative filter papers
Supplier: GERBER FUNKE
Filter paper, quantitative, 28 mm
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Qualitative filter paper, grades MN 619 eh and 619 eh 1/4, circles and folded filters
Supplier: MACHEREY-NAGEL
MN 619 eh is slightly more dense than MN 619 with high particle retention and slow flow rate.
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Qualitative filter papers, grades MN 618 and 618 1/4, circles and folded filters
Supplier: MACHEREY-NAGEL
MN 618 is a thick filter paper with medium flow rates and finer retention. It's higher loading capacity than thinner papers makes it especially useful for the filtration of large quantities of liquids.



