VGKL Laboratory Catalogue Issue 15


Main -> Separating systems -> Filtration -> Filter papers

Round Filters, IDL

1 Round filters for qualitative analysis, type Basic

Slow filtering.

Filtering speed acc. to Herzberg:	130 sec.
Grammage:	75 g/m2
Pore size:	ca. 8 μm
Packaging unit:	100

2 Round filters for quantitative analysis, type Blue

Very slow filtering, for very fine precipitations.

Filtering speed acc. to Herzberg:	180 sec.
Grammage:	80 g/m2
Ash content:	0.007%
Pore size:	ca. 2 to 3 μm
Packaging unit:	100

3 Round filters for quantitative analysis, type White

Quick filtering, for medium-coarse precipitations.

Filtering speed acc. to Herzberg:	20 sec.
Grammage:	80 g/m2
Ash content:	0.007%
Pore size:	ca. 15 μm
Packaging unit:	100

4 Round filters for quantitative analysis, type Black

Very quick filtering, for coarse precipitations.

Filtering speed acc. to Herzberg:	10 sec.
Grammage:	80 g/m2
Ash content:	0,007%
Pore size:	ca. 20 to 25 μm
Packaging unit:	100