Ashless filter papers

For quantitative analysis and filtration with low blank values 
Ashless filter papers are particularly suited for quantitative routine  analysis and are manufactured from refined pulp and linters. They are acid-washed and have an extremely low ash content of 0.01%. The amount of a-cellulose is about 95%.

Ashless filter paper grades
Medium fast filtration, ashless, for example for magnesium-ammonium-phosphate and zinc sulfide.

Filter Papers – Filtrierpapiere
Grade / Sorte                                            MN 640 m
Weight / Gewicht [g/m2]                            85
Thickness / Dicke [mm]                              0,2
Filtration speed / Filtriergeschwindigkeit       27
[s]
Surface / Oberfläche                                   smooth / glatt
Ash content / Aschegehalt (%)                     < 0,01
Average retention capacity /                         4 – 12
mittleres Rückhaltevermögen
[μm]
Applications and properties /                        Ashless, medium fast
filtration, e.g. for sulphides,
lead chromate, calcium
oxalate /
Anwendungen und Eigenschaften                  Aschefrei, mittelschnell
filtrierend, z.B. für Sulfide,
Bleichchromat,
Calciumoxalat