Hai cercato: Carta da filtro
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. VWR offers a wide range of qualitative and quantitative filter papers with varying pore size, particle retention, flow rate and filtration times.
Quantitative filter papers, ashless grades, grade 43, Whatman™
Supplier: Whatman products (Cytiva)
Cytiva's Whatman Grade 43 filters support inorganic analysis and other forms of instrumental analyses. The low ash content also makes Grade 43 appropriate for gravimetric analyses requiring sample combustion.
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Quantitative filter papers, hardened low ash grades, grade 52, Whatman™
Supplier: Whatman products (Cytiva)
Cytiva's Whatman Grade 52 is a general-purpose filter paper for quantitative analysis in Büchner funnel and other vacuum filtrations. The acid-hardened surface and low ash content enable efficient precipitate recovery.
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Grade 595 ½ qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
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).
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Application specific filter papers, grade 287 ½, Whatman™
Supplier: Whatman products (Cytiva)
Kieselguhr paper with a medium to slow flow rate. Additional adsorption effect, e.g., for the separation of very fine semi-colloidal turbidity, for clarifying milk serum, starch solutions, soil suspensions or sugar-containing solutions prior to polarimetry or refractometry.
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Filter papers for soil analysis
Supplier: Ahlstrom-Munksjö
These papers are used to determine the presence of trace elements and nutrients in soil samples to optimise plant growth.
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Carta da filtro quantitativa
Supplier: Sartorius
Queste carte da filtro sono ottenute da pasta di legno raffinata e linter di cotone con una percentuale di alfa-cellulosa superiore al 98%. Sono garantite esenti da acidi residui e hanno un contenuto di ceneri estremamente basso. Pertanto, questi filtri sono praticamente privi di ceneri. Tutte le carte da filtro Sartorius prive di ceneri si caratterizzano per un'elevata resistenza al bagnato e un'elevata purezza e sono quindi particolarmente adatte per analisi quantitative, imbuti di Büchner, filtrazione a pressione o sotto vuoto.
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Filter papers for breweries
Supplier: Ahlstrom-Munksjö
Ahlstrom-Munksjö offers filters for malt analysis and malt filtration according to MEBAK, ASBC and EBC standards.
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Application specific filter papers, grade 3459, Whatman™
Supplier: Whatman products (Cytiva)
Creped cellulose filter papers with good retentivity at a relatively high filtration speed. They are used for the clarifying filtration of dried beet pulp extracts or beet juice after the addition of lead acetate for subsequent polarimetric sugar determination. They are specifically designed for the Venema unit (lead acetate method).
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Quantitative filter papers, hardened ashless grades, grade 391
Supplier: Ahlstrom-Munksjö
These quantitative ashless hardened filter papers are recommended for use where a high purity is required for quantitative analysis.
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Quantitative filter papers, ashless grades, grade 44, Whatman™
Supplier: Whatman products (Cytiva)
Cytiva's Whatman Grade 44 quantitative paper is a thin version of Grade 42 ashless paper. The thinness reduces the overall ash content, making Grade 44 well suited for analyses relying on ash-free dry weight.
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Industrial filter boards, Munktell
Supplier: Ahlstrom-Munksjö
Boards which by their filtration properties are keyed to specific applications as well as to industrial filtration processes.
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Carte da filtro in farina fossile, grado 470
Supplier: Sartorius
Grade 470 papers are made of cellulose and diatomaceous earth and offer a much better separating capability than pure cellulose papers at the same rate of filtration.
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Quantitative filter papers, hardened ashless grades, grade 392
Supplier: Ahlstrom-Munksjö
These quantitative ashless hardened filter papers are recommended for use where a high purity is required for quantitative analysis.
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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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Qualitative filter papers, technical, smooth, grade 3 m/N
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%. They are used for routine analyses like clarification, determination of substances, but also as discs with a centre 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, technical, smooth, grade 3 hw
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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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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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 100/N
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, Munktell
Supplier: Ahlstrom-Munksjö
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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Carta per separazione di fase, grado 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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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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Industrial Filter Papers
Supplier: Ahlstrom-Munksjö
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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Quantitative filter papers
Supplier: GERBER FUNKE
Carta da filtro per analisi quantitative
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Qualitative and technical filter papers, grade MN 514 ¹/₄
Supplier: MACHEREY-NAGEL
Carta da filtro per analisi qualitative, Grade MN 514 ¹/₄, 320 mm
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Ashless quantitative filter papers
Supplier: Ahlstrom-Munksjö
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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Filter boards
Supplier: Sartorius
Filter boards are used for filtration of cooking oils, transformer oils and as base paper for impregnation with certain reagents.
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Filter paper for breweries
Supplier: MACHEREY-NAGEL
Filter papers used in beverage industries. Available in plain and folded form.
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Qualitative filter papers, technical
Supplier: MACHEREY-NAGEL
Grade MN 651, creped.
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Filter papers for fat analysis
Supplier: MACHEREY-NAGEL
Smooth folded filter papers for fat analysis.