Filterpapper
Filterpapper tillverkat av ren cellulosa behandlad med saltsyra och fluorvätesyra är ett kvantitativt papper som används för filtrering med höga flödeshastigheter och god retention. Det skapar en semipermeabel barriär vinkelrät mot vätske- eller luftflöde för att separera fina ämnen från vätskor eller luft. Olika kvaliteter av filterpapper finns tillgängliga för rutinmässigt laboratoriearbete, från grov till fin partikelfiltrering.
VWR®, Filterpapper för fasseparering, klass 511
Supplier: VWR Collection
Hydrofobt filterpapper för separation av vattenfasen från organfasen.
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VWR® Low Nitrogen Content Filters, Grade 521
Supplier: VWR Collection
Low nitrogen content filters for determination of nitrogen content in steel and iron samples dissolved in acid. Filtration of fine precipitates to dissolve according Kjeldahl method.
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VWR®, Kvantitativa filterpapper
Supplier: VWR Collection
424: Används för filtrering av blysulfid, järnsulfid, silversulfid, alkalikarbonat, blykromat, arsenik, antimon, kadmium och livsmedel. Bestämning av sandhalt i mejeriprodukter. Bestämning av opacitet hos massa på pappersbruk.
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VWR®, Filterpapper, kvalitativa
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 3 qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
A standard grade filter used in qualitative analytical techniques to determine and identify materials. For use in büchner funnels.
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Grade shark skin filter papers for technical use, Whatman™
Supplier: Whatman products (Cytiva)
Whatman Grade Shark Skin filter papers are a creped filter paper that is commonly used to remove impurities in a variety of applications.
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Grade 5 qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
A standard grade clarifying filter excellent for cloudy suspensions and for water and soil analysis.
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Grade 520 a ½ qualitative filter papers, 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, grade 201, Whatman™
Supplier: Whatman products (Cytiva)
A general qualitative filter for less critical routine analysis. Widely used in industrial laboratories and students laboratories for routine filtration.
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Qualitative filter papers, standard grades, grade 591, Whatman™
Supplier: Whatman products (Cytiva)
These cellulose filters are used in qualitative analytical techniques to determine and identify materials.
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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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Grade 602 h qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
A standard grade filter esed in sample preparation, e.g., in the beverage industry for residual sugar determination, acidic spectra, refractometric analysis, and HPLC.
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Grad 8 härdat filterpapper, Whatman™
Supplier: Whatman products (Cytiva)
These white cotton linter cellulose filters are ideal for routine investigations of foreign substances in a variety of sample types.
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Qualitative filter papers, high-purity
Supplier: Sartorius
These paper grades are used for analytical purposes that require a low ash content. They are essentially used for qualitative analyses.
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Qualitative filter papers, wet strengthened grades, grade 1574 and 1574 ½, Whatman™
Supplier: Whatman products (Cytiva)
Medium fast cellulose filter paper with high wet strength. This paper has the same chemical resistance characteristics as Grade 1573.
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Grade 2589 D filter papers for technical use, Whatman™
Supplier: Whatman products (Cytiva)
A very thick filter with high wet strength. Offers medium to slow flow rate and retains very fine precipitates.



