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Qualitative filter paper

Full description

Ashless hardened filter paper for qualitative analysis


Qualitative filters are made of refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100%, which gives them a number of diverse filtration properties.
The ash content of less than 0,06% is not reduced by post-treatment.
Qualitative filter papers are available in sheets, discs and folded filters.

F1001 GRADE - Medium filtration

The most widely used filter paper in the CHM® range.

Medium retention and flow rate. This grade covers a wide range of laboratory applications and is frequently used for clarifying liquids. Traditionally this grade is used in qualitative analytical separations for routine laboratory work as well as rapid filtration of fine precipitates such as lead sulphate, calcium oxalate (hot) and calcium carbonate. In agriculture, it is used for soil analysis and seed testing procedures.

In the food industry, Grade F1001 is used for numerous routine techniques to separate solid foodstuffs from associated liquid or extracting liquid.
It is widely used in education for teaching simple qualitative analytical separations.

In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain-intensity measured photometrically.
For gas detection, the paper is impregnated with a chromogenic reagent and colour formation quantified by optical reflectance.

F1002 GRADE - Medium-slow filtration

Slightly more retentive and absorbent than Grade F1001 and therefore with a moderate to slow filtration speed.

In addition to general filtration this grade F1002 is used for monitoring specific contaminants in the atmosphere, filtration of fine precipitates, soil testing, it is often used as folded filter in an analytical funnel.

F1003 GRADE - Medium-slow filtration (thick)

Medium to low rate of filtration with double the thickness comparing with CHM® Grade F1001.

Fine particle retention and excellent loading capacity.

The extra thickness gives increased wet strength and allows a higher solute loading.

Preferably used for liquids hard to clarify, essences, oils, tinctures, particularly useful for use in Buechner-funnels.

F1004 GRADE - Very fast filtration

Very high rate of filtration with excellent retention of coarse precipitates such as metal hydroxides and sulphides or gelatinous substances.
Preferably used as rapid filter for various organic metal precipitates, routine cleanup of biological fluids, food industry analysis, air pollution monitoring (high rates and the fine particles collection is not critical).

F1005 GRADE - Very slow filtration

Lowest rate of filtration in the CHM® qualitative range and maximum degree of fine particle filtration or retention. Preferably used as clarifying filter for cloudy suspensions and for water and soil analysis. Particularly used in difficult filtration conditions and extra fine-grained precipitates, barium sulphate, cuprous oxide, often specified for clarification of wine.

F1006 GRADE - Slow filtration

Similar particle retention as Grade F1005 with higher filtration speed.

Often used for boiler water analysis.
Product specification
GRADE PROPERTIES WEIGTH,           g/m2 THICKNESS, µm RETENTION RANGE, µm ASH CONTENT,%
F1001 Medium 85 180  10-13 <0.06
F1002 Medium-slow 100 190  7-8 <0.06
F1003 Medium-slow/Thick 200 320  5-7 <0.06
F1004 Very fast 85 210 15-20 <0.06
F1005 Very slow 85 170  3-5 <0.06
F1006 Slow 85 150  2-4 <0.06
Order information
DIAMETER (mm) F1001 F1002 F1003 F1004 F1005 F1006
                                CIRCLES (1000/box)
25 F1001-025 F1002-025 F1003-025 F1004-025 F1005-025 F1006-025
                                   CIRCLES (*) (100/box)
37 F1001-037 F1002-037 F1003-037 F1004-037 F1005-037 F1006-037
40.5 F1001-040 F1002-040 F1003-040 F1004-040 F1005-040 F1006-040
42.5 F1001-042 F1002-042 F1003-042 F1004-042 F1005-042 F1006-042
47 F1001-047 F1002-047 F1003-047 F1004-047 F1005-047 F1006-047
50 F1001-050 F1002-050 F1003-050 F1004-050 F1005-050 F1006-050
55 F1001-055 F1002-055 F1003-055 F1004-055 F1005-055 F1006-055
70 F1001-070 F1002-070 F1003-070 F1004-070 F1005-070 F1006-070
80 F1001-080 F1002-080 F1003-080 F1004-080 F1005-080 F1006-080
90 F1001-090 F1002-090 F1003-090 F1004-090 F1005-090 F1006-090
100 F1001-100 F1002-100 F1003-100 F1004-100 F1005-100 F1006-100
110 F1001-110 F1002-110 F1003-110 F1004-110 F1005-110 F1006-110
125 F1001-125 F1002-125 F1003-125 F1004-125 F1005-125 F1006-125
150 F1001-150 F1002-150 F1003-150 F1004-150 F1005-150 F1006-150
185 F1001-185 F1002-185 F1003-185 F1004-185 F1005-185 F1006-185
200 F1001-200 F1002-200 F1003-200 F1004-200 F1005-200 F1006-200
240 F1001-240 F1002-240 F1003-240 F1004-240 F1005-240 F1006-240
270 F1001-270 F1002-270 F1003-270 F1004-270 F1005-270 F1006-270
320 F1001-320 F1002-320 F1003-320 F1004-320 F1005-320 F1006-320
SIZE (mm) SHEETS (100/pack)
460x570 F1001-460570 F1002-460570 F1003-460570 F1004-460570 F1005-460570   F1006-460570
580x580 F1001-580580 F1002-580580 F1003-580580 F1004-580580 F1005-580580   F1006-580580
(*) Add an F at the end of the reference for folded circles (e.g. F1001-150F) 
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ПРИЛОЖЕНИЯ.pdf

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