Whatman® Qualitative Filter Paper
    In Columbia

    Columbia Whatman,Whatman Qualitative Filter Paper, Whatman Filter Paper

These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.

Grade 1: 11 µm
The most widely used filter paper for routine applications with medium retention and flow rate. Extended range of sizes includes 10 mm to 500 mm diameter circles and 460 mm x 570 mm sheets. This filter is also available in the FilterCup , this is a convenient, disposable 70 mm filter funnel with a 250 mL capacity molded from polypropylene with an integral, heat bonded filter (catalog number 1600-001).

This grade covers a wide range of laboratory applications and is frequently used for clarifying liquids. Traditionally the grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot) and calcium carbonate.

In agriculture, it is used for soil analysis and seed testing procedures. In the food industry, Grade 1 is used for numerous routine techniques to separate solid foodstuffs from associated liquid or extracting liquid and 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 color formation quantified by optical reflectance.

Grade 2: 8 µm
Slightly more retentive than Grade 1 with a corresponding increase in filtration time (i.e. slightly slower filtration speed). More absorbent than Grade 1. In addition to general filtration in the 8 µm particle size range, the extra absorbency is utilized, for example, to hold soil nutrient in plant growth trials. Also used for monitoring specific contaminants in the atmosphere and in soil testing. Also available prepleated as Grade 2V.

Grade 3: 6 µm
Double the thickness of Grade 1 with still finer particle retention and excellent loading capacity; more precipitate can be held without clogging. The extra thickness gives increased wet strength and makes this grade highly suitable for use in Büchner funnels. The high absorbency is particularly valuable when the paper is used as a sample carrier. This filter is also available in the FilterCup. This is a convenient, disposable 70 mm filter funnel with a 250 mL capacity molded from polypropylene with an integral, heat bonded filter (catalog number 1600-003).

Grade 4: 20-25 µm
Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

Grade 5: 2.5 µm
The maximum degree of fine particle filtration in the qualitative range. Capable of retaining the fine precipitates encountered in chemical analysis. Slow flow rate. Excellent clarifying filter for cloudy suspensions and for water and soil analysis. Also available prepleated as Grade 5V

Grade 6: 3 µm
Twice as fast as Grade 5 with similar fine particle retention. Often specified for boiler water analysis applications.

Grade 591: 7-12 µm
A thick filter paper with very high loading capacity for fast filtration of medium to coarse precipitates. Offers high absorbency and increased wet strength. Also available prepleated as Grade 591 ½.

Grade 595: 4-7 µm
Very popular, thin filter paper, medium-fast with medium to fine particle retention. Used for many routine analytical applications in different industries, (e.g., particle separation from food extracts or filtration of solids from digested environmental samples, e.g., for ICP/AAS analysis). Also available prepleated as Grade 595 ½.

Grade 597: 4-7 µm
A medium fast filter paper with medium to fine particle retention. Used for a wide variety of analytical routine applications in different industries like food testing (e.g., determination of fat content acc. to Section 35 LMBG*) or removal of carbon dioxide and turbidity from beverages (e.g., beer analysis). Available prepleated as Grade 597 ½.
* German law for food and consumer products

Grade 598: 8-10 µm
A thick filter paper with high loading capacity. Combines medium retention with medium-fast to fast filtration speed.
Also available prepleated as Grade 598 ½.

Grade 602 h: < 2 µm
A dense filter paper for collecting very small particles and removing fine precipitates. Used in sample preparation, e.g., in the beverage industry for residual sugar determination, acidic spectra, refractometric analysis and HPLC.
Available prepleated as Grade 602 h ½ 

For qualitative wet strengthened papers see Qualitative Filter Papers - Wet Strengthened Grades

 

Typical Properties - Qualitative Standard Filter Grades
Grade Description Particle
Retention
in Liquid (µm)
Filtration Speed
(approx.)
Herzberg (s)
Air Flow
(s/100 mL/in2)
Typical
Thickness
(µm)
Basis Weight
(g/m2)
1 Medium Flow 11* 150 10.5 180 88
2 Medium Flow 8* 240 21 190 103
3 Medium Flow, Thick 6* 325 26 390 187
4 Very Fast 20-25* 37 3.7 205 96
5 Slow 2.5* 1420 94 200 98
6 Medium to Slow 3* 715 35 180 105
591 Medium Fast, Thick 7-12** 45 5.9 360 165
595 Medium Fast, Thin 4-7** 80 - 160 68
597 Medium Fast 4-7** 140 - 190 85
598 Medium Fast, Thick 8-10** 50 - 320 140
602 h Slow, Dense < 2** 750 - 150 85

* Particle Retention Rating at 98% efficiency
** Approximate values


Ordering Information - Qualitative Filter Papers - Standard Grades
Catalog Number Description

Grade 1

1001-6508 Grade 1 circles, 10 mm, 500/pk
1001-0155 Grade 1 circles, 15 mm, 500/pk
1001-018 Grade 1 circles, 18 mm, 400/pk
1001-020 Grade 1 circles, 20 mm, 400/pk
1001-325 Grade 1 circles, 25 mm, 100/pk
1001-025 Grade 1 circles, 25 mm, 400/pk
1001-329 Grade 1 circles, 30 mm, 100/pk
1001-030 Grade 1 circles, 30 mm, 400/pk
1001-032 Grade 1 circles, 32 mm, 100/pk
1001-042 Grade 1 circles, 42.5 mm, 100/pk
1001-047 Grade 1 circles, 47 mm, 100/pk
1001-055 Grade 1 circles, 55 mm, 100/pk
1001-070 Grade 1 circles, 70 mm, 100/pk
1001-085 Grade 1 circles, 85 mm, 100/pk
1001-090 Grade 1 circles, 90 mm, 100/pk
1001-110 Grade 1 circles, 110 mm, 100/pk
1001-125 Grade 1 circles, 125 mm, 100/pk
1001-150 Grade 1 circles, 150 mm, 100/pk
1001-185 Grade 1 circles, 185 mm, 100/pk
1001-240 Grade 1 circles, 240 mm, 100/pk
1001-270 Grade 1 circles, 270 mm, 100/pk
1001-320 Grade 1 circles, 320 mm, 100/pk
1001-385 Grade 1 circles, 385 mm, 100/pk
1001-400 Grade 1 circles, 400 mm, 100/pk
1001-500 Grade 1 circles, 500 mm, 100/pk
1001-813 Grade 1 sheets, 26 x 31 mm, 1000/pk
1001-824 Grade 1 sheets, 75 x 100 mm, 500/pk
1001-917 Grade 1 sheets, 460 x 570 mm, 100/pk
1001-918 Grade 1 sheets, 460 x 570 mm, 500/pk
1001-931 Grade 1 sheets, 580 x 680 mm, 100/pk
1001-932 Grade 1 sheets, 580 x 680 mm, 500/pk
1001-929 Grade 1 sheets, 600 x 600 mm, 100/pk
1600-001 FilterCup 70 (requires FilterCup stem, catalog number 1600-900), 25/pk

Grade 2

1002-325 Grade 2 circles, 25 mm, 100/pk
1002-042 Grade 2 circles, 42.5 mm, 100/pk
1002-047 Grade 2 circles, 47 mm, 100/pk
1002-055 Grade 2 circles, 55 mm, 100/pk
1002-070 Grade 2 circles, 70 mm, 100/pk
1002-090 Grade 2 circles, 90 mm, 100/pk
1002-094 Grade 2 circles, 90 mm, 1000/pk
1002-110 Grade 2 circles, 110mm, 100/pk
1002-125 Grade 2 circles, 125 mm, 100/pk
1002-150 Grade 2 circles, 150 mm, 100/pk
1002-185 Grade 2 circles, 185 mm, 100/pk
1002-240 Grade 2 circles, 240 mm, 100/pk
1002-270 Grade 2 circles, 270 mm, 100/pk
1002-320 Grade 2 circles, 320 mm, 100/pk
1002-385 Grade 2 circles, 385 mm, 100/pk
1002-500 Grade 2 circles, 500 mm, 100/pk
1002-6691 Grade 2 sheets, 430 x 680 mm, 500/pk
1002-917 Grade 2 sheets, 460 x 570 mm, 100/pk
1002-931 Grade 2 sheets, 580 x 680 mm, 100/pk
1002-929 Grade 2 sheets, 600 x 600 mm, 100/pk

Grade 3

1003-323 Grade 3 circles, 23 mm, 100/pk
1003-042 Grade 3 circles, 42.5 mm, 100/pk
1003-055 Grade 3 circles, 55 mm, 100/pk
1003-070 Grade 3 circles, 70 mm, 100/pk
1003-090 Grade 3 circles, 90 mm, 100/pk
1003-110 Grade 3 circles, 110 mm, 100/pk
1003-125 Grade 3 circles, 125 mm, 100/pk
1003-150 Grade 3 circles, 150 mm, 100/pk
1003-185 Grade 3 circles, 185 mm, 100/pk
1003-240 Grade 3 circles, 240 mm, 100/pk
1003-270 Grade 3 circles, 270 mm, 100/pk
1003-320 Grade 3 circles, 320 mm, 100/pk
1003-500 Grade 3 circles, 500 mm, 100/pk
1003-433 Grade 3 sheets, 305 x 457 mm, 100/pk
1003-917 Grade 3 sheets, 460 x 570 mm, 100/pk
1003-930 Grade 3 sheets, 580 x 580 mm, 100/pk
1600-003 FilterCup 70 (requires FilterCup stem, catalog number 1600-900), 25/pk

Grade 4

1004-325 Grade 4 circles, 25 mm, 100/pk
1004-027 Grade 4 circles, 27 mm, 400/pk
1004-042 Grade 4 circles, 42.5 mm, 100/pk
1004-047 Grade 4 circles, 47 mm, 100/pk
1004-050 Grade 4 circles, 50 mm, 100/pk
1004-055 Grade 4 circles, 55 mm, 100/pk
1004-070 Grade 4 circles, 70 mm, 100/pk
1004-090 Grade 4 circles, 90 mm, 100/pk
1004-110 Grade 4 circles, 110 mm, 100/pk
1004-125 Grade 4 circles, 125 mm, 100/pk
1004-150 Grade 4 circles, 150 mm, 100/pk
1004-185 Grade 4 circles,185 mm, 100/pk
1004-240 Grade 4 circles, 240 mm, 100/pk
1004-270 Grade 4 circles, 270 mm, 100/pk
1004-320 Grade 4 circles, 320 mm, 100/pk
1004-400 Grade 4 circles, 400 mm, 100/pk
1004-912 Grade 4 sheets, 130 x 190 mm, 500/pk
1004-911 Grade 4 sheets, 140 x 190 mm, 500/pk
1004-922 Grade 4 sheets, 250 x 355 mm, 100/pk
1004-917 Grade 4 sheets, 460 x 570 mm, 100/pk
1004-930 Grade 4 sheets, 580 x 580 mm, 100/pk

Grade 5

1005-325 Grade 5 circles, 25 mm, 100/pk
1005-042 Grade 5 circles, 42.5 mm, 100/pk
1005-047 Grade 5 circles, 47 mm, 100/pk
1005-055 Grade 5 circles, 55 mm, 100/pk
1005-070 Grade 5 circles, 70 mm, 100/pk
1005-090 Grade 5 circles, 90 mm, 100/pk
1005-110 Grade 5 circles, 110 mm, 100/pk
1005-125 Grade 5 circles, 125 mm, 100/pk
1005-150 Grade 5 circles, 150 mm, 100/pk
1005-185 Grade 5 circles, 185 mm, 100/pk
1005-240 Grade 5 circles, 240 mm, 100/pk
1005-320 Grade 5 circles, 320 mm, 100/pk
1005-550 Grade 5 circles, 550 mm, 100/pk

Grade 6

1006-042 Grade 6 circles, 42.5 mm, 100/pk
1006-070 Grade 6 circles, 70 mm, 100/pk
1006-090 Grade 6 circles, 90 mm, 100/pk
1006-110 Grade 6 circles, 110 mm, 100/pk
1006-125 Grade 6 circles, 125 mm, 100/pk
1006-150 Grade 6 circles, 150 mm, 100/pk
1006-185 Grade 6 circles, 185 mm, 100/pk
1006-240 Grade 6 circles, 240 mm, 100/pk

Grade 591

10311387 Grade 591 sheets, 580 x 580 mm, 250/pk

Grade 595

10311610 Grade 595 circles, 110 mm, 100/pk
10311611 Grade 595 circles, 125 mm, 100/pk
10311612 Grade 595 circles, 150 mm, 100/pk
10311687 Grade 595 sheets, 580 x 580 mm, 100/pk

Grade 597

10311862 Grade 597 circles, 12.7 mm, 1000/pk
10312040 Grade 597 circles, 42.5 mm, 100/pk
10311804 Grade 597 circles, 45 mm, 100/pk
10311807 Grade 597 circles, 55 mm, 100/pk
10311808 Grade 597 circles, 70 mm, 100/pk
10311809 Grade 597 circles, 90 mm, 100/pk
10311810 Grade 597 circles, 110 mm, 100/pk
10311811 Grade 597 circles, 125 mm, 100/pk
10311812 Grade 597 circles, 150 mm, 100/pk
10311814 Grade 597 circles, 185 mm, 100/pk
10311820 Grade 597 circles, 240 mm, 100/pk
10311822 Grade 597 circles, 320 mm, 100/pk
10311897 Grade 597 sheets, 580 x 580 mm, 100/pk
10311887 Grade 597 sheets, 580 x 580 mm, 500/pk

Grade 598

10312209 Grade 598 circles, 90 mm, 100/pk
10312287 Grade 598 sheets, 580 x 580 mm, 250/pk

Grade 602 h

10312609 Grade 602 h circles, 90 mm, 100/pk
10312611 Grade 602 h circles, 125 mm, 100/pk
10312612 Grade 602 h circles, 150 mm, 100/pk
10312614 Grade 602 h circles, 185 mm, 100/pk
10312620 Grade 602 h circles, 240 mm, 100/pk

FilterCup Stem

1600-900 FilterCup stem, 1/pk

For any othe requirements of Filters & Filter Papers, please mail us at vinod@innovacorporate.com Or amavinod@bol.net.in or call us on our Mobile No. +91-9312871070 Or 9911130697.