Quantitative Filter Papers vs Qualitative Filter Papers

Quantitative Filter Papers vs Qualitative Filter Papers

Quantitative Filter Papers – these are used for gravimetric analyses or filtrations where the preipitate is to be recovered, for example from a Buchner funnel filtration under vacuum.

Qualitative Filter Papers – these are used in qualitative techniques to identify materials. They do not offer the same level of precipitate recovery as quantitative filter papers.

Ahlstrom's qualitative grades of filter paper are, by definition, 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.