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LABORATORY FILTER PAPERS
BOECO FILTER PAPERS
QUANTITATIVE FILTERS
quantitative ashless filter papers are recommended for quantitative
analysis. As quantitative analysis requires a high purity, these filters are
being washed out with acid
388 -
black
spot -
fast filtering, wide pores, ashless hardened
For coarse and voluminous precipitates such as iron-aluminium and
chromium hydroxide; Si-determination in steel and pig iron analysis
Basis weight:
84 g/m
2
Filtration velocity:
10 ml / 10 seconds
Typical pore size:
12 - 15 µm
Similar to:
S&S 589/1, M-N 640w
Diam.
Code
Grade/Description
Pack of
55 mm FTR 3.101.055 388 / Filter discs. Black dot
100
70 mm FTR 3.101.070 388 / Filter discs. Black dot
100
90 mm FTR 3.101.090 388 / Filter discs. Black dot
100
110 mm FTR 3.101.110 388 / Filter discs. Black dot
100
125 mm FTR 3.101.125 388 / Filter discs. Black dot
100
150 mm FTR 3.101.150 388 / Filter discs. Black dot
100
185 mm FTR 3.101.185 388 / Filter discs. Black dot
100
240 mm FTR 3.101.240 388 / Filter discs. Black dot
100
146
FILTER PAPERS
392
-
red
spot
- medium to slowly filtering, medium tight,
ashless hardened
Fast filtration of fine precipitates such as calcium oxalate, magnesium
ammonium phosphate, coarser forms of barium sulphate
Basis weight
84 g/m
2
Filtration velocity:
10 ml / 50 seconds
Typical pore size:
5 - 8 µm
Similar to
Whatman 43, S&S 589/5, M-N 640md
Diam.
Code
Grade/Description
Pack of
55 mm FTR 3.105.055 392 / Filter discs. Red dot
100
70 mm FTR 3.105.070 392 / Filter discs. Red dot
100
90 mm FTR 3.105.090 392 / Filter discs. Red dot
100
110 mm FTR 3.105.110 392 / Filter discs. Red dot
100
125 mm FTR 3.105.125 392 / Filter discs. Red dot
100
150 mm FTR 3.105.150 392 / Filter discs. Red dot
100
185 mm FTR 3.105.185 392 / Filter discs. Red dot
100
240 mm FTR 3.105.240 392 / Filter discs. Red dot
100
389
-
spot
- medium fast filtering, medium wide pores,
ashless hardened
Typical grade for quantitative tasks, coarser precipitates, such as lead-, iron
and silver sulphide alcali carbonates, food stuff and soil analysis
Basis weight:
84 g/m
2
Filtration velocity:
10 ml / 20 seconds
Typical pore size:
8 - 12 µm
Similar to:
Whatman 41, S&S 589/2, M-N 640m
Diam.
Code
Grade/Description
Pack of
55 mm FTR 3.102.055 389 / Filter discs. White dot
100
70 mm FTR 3.102.070 389 / Filter discs. White dot
100
90 mm FTR 3.102.090 389 / Filter discs. White dot
100
110 mm FTR 3.102.110 389 / Filter discs. White dot
100
125 mm FTR 3.102.125 389 / Filter discs. White dot
100
150 mm FTR 3.102.150 389 / Filter discs. White dot
100
185 mm FTR 3.102.185 389 / Filter discs. White dot
100
240 mm FTR 3.102.240 389 / Filter discs. White dot
100