Filter Papers
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Filter Papers   for the Laboratory and Industry

Filter papers – An Introduction Product Overview Ash-free Filter Papers for Quantitative and Gravimetric Analyses Wet-strengthened Filter Papers for Qualitative Analyses High-purity Filter Papers for Qualitative Analyses Smooth Filter Papers for Qualitative & Technical Analyses Crêped Filter Papers for Qualitative & Technical Analyses Paper Boards for the Filtration and Absorption of Liquids Seed Testing Papers Filter Papers for the Sugar Industry Diatomaceous Earth Filter Paper Phase Separating Paper Nonwovens Surface Protection Paper Blotting Papers Blotting Membranes Chromatography...

Filter Papers – An Introduction High-grade filter papers are indispensable for routine work in laboratory and industrial applications. Sartorius supplies you with a broad range of filter papers for myriad filtration tasks and supports you in solving all your filtration challenges. With this catalog, we invite you to familiarize yourself with our broad product range. Here, you will find typical examples intended to help you quickly select the filter paper that is right for your application. Our Product range covers: Quantitative, qualitative filter papers Technical papers and boards Blotting...

Product Overview Fine crystalline Very fine crystalline Medium-fine crystalline Coarse crystalline Very fine crystalline Fine crystalline Medium-fine crystalline Coarse crystalline Quantitative Filter Papers 388 Fast filtering, wide-pore, loose structure, ash-free, wet-strengthened 389 Slow filtering, narrow-pore, dense, ash-free, wet-strengthened Medium fast filtering, medium- to wide-pore, low-fat content, ash-free, wet-strengthened Blue dot Very slow filtering, fine-pore, very dense, ash-free, wet-strengthened Medium fast filtering, medium density Very slow filtering, very fine-pore,...

Ash-free Filter Papers for Quantitative and Gravimetric Analyses These filter papers are used for quantitative and gravimetric analyses as well as for pressure or vacuum filtration. They are made out of 100 % cotton linters with an α-cellulose content of > 98 % and are acidwashed to make the papers ashless and achieve high purity. Application Examples For some quantitative analyses, the cake layer has to be mechanically removed from the filter (for example, with a water jet or a spatula). The filter must be wet-strengthened so that it doesn’t break when the cake layer is removed....

Technical Specifications Grade Coarse crystalline Wide-pore, loose structure, fast filtering Medium-fine crystalline Medium- to wide-pore, medium fast filtering Fine crystalline Medium dense, medium fast filtering Fine crystalline Narrow-pore, dense, slow filtering Very fine crystalline Fine-pore, dense, very slow filtering Very fine crystalline Very fine-pore, very dense, very slow filtering * See test methods, page 33 Ordering Information Filter Discs, 100 pieces Folded Filters, 100 pieces

Wet-strengthened Filter Papers for Qualitative Analyses These qualitative filter papers are essentially used for analytical purposes and routine analyses, whenever no gravimetric analyses are required. They are wet-strengthened and can be used for pressure and vacuum filtration. They are made of refined pulp and linters with an > 95 % α-cellulose content, are very pure with an ash content < 0.1 %. Application Examples Application Must analysis Routine filtration for malt analysis Rapid filtration of fine precipitates Analysis of coffee extracts Tannin solutions Made of refined pulp and...

Technical Specifications Grade Coarse crystalline Wide-pore, loose structure, fast filtering Medium-fine crystalline Medium- to wide-pore, medium fast filtering Fine crystalline Medium dense, medium fast filtering Fine crystalline Narrow-pore, dense, slow filtering Very fine crystalline Fine-pore, dense, very slow filtering Very fine crystalline Very fine-pore, very dense, very slow filtering * See test methods, page 33 Ordering Information Filter Discs, 100 pieces Folded Filters, 100 pieces

High-Purity Filter Papers for Qualitative Analyses These paper grades are used for analytical purposes that require a low ash content. Grades 292 and 292a are especially suitable for soil analyses because they are low in nitrogen. For phosphate or sodium determination, we recommend grades 131 and 132. Application Examples Application Malt filtration according to EBC standards Determination of nitrogen content in soils Determination of phosphate and sodium content in soils Pure cotton linters or cotton linters with refined pulp additives, such as wet-strengthening No agents Supplied in...

Ordering Information Filter Discs, 100 pieces Folded Filters, 100 pieces Other dimensions are available on req

Smooth Filter Papers for Qualitative & Technical Analyses 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. White and bright particles can be easily detected with the black paper grade 918, due to the color contrast for example for the detection of fluorine or silicon in water or the detection of mycelium in mildews. Application Examples...

Ordering Information Filter Discs Folded Filters, 100 pieces Other dimensions are available on

Crêped Filter Papers for Qualitative & Technical Analyses Crêped filter papers are mostly used for the rapid filtration of relatively coarse precipitates; because of their crêped structure they provide a larger filtration area than smooth filter papers. Grades with a wet burst resistance > 30 kPa are referred to as wet-strengthened and are therefore suitable for pressure or vacuum filtration. Below you will find an overview of the most commonly used grades. Application Examples Application Cooking oils Vinegar filtration Galvanic baths Filtration of sugar solutions Filtration of essential...