VWR® Filter papers offer a wide range of ash-less filter paper for qualitative and quantitative analysis.

• Made of 100 % cotton linters
• Ash-free (ash content ≤0,01% according to DIN 54370)
• Wet-strengthened apart from S1 grade
• Colour-coded box for easy selection
• Supplied in rolls, sheets, discs, and folded filters

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%.

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 acid-washed to make the papers ashless and achieve high purity.