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Grade 1 Qualitative Filter Paper

A widely used standard grade filter paper for routine applications with medium retention and flow rate. It covers a wide range of laboratory applications and is frequently used for clarifying liquids.

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 to 500 mm diameter circles and 460 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 Weight g/m2 Thickness ASH % Surface Texture LIQUID Retention
1 87 0.18 mm 0.06 Smooth 11 ?m
2 97 0.19 mm 0.06 Smooth 8 ?m
3 185 0.40 mm 0.06 Rough 5 ?m
4 92 0.21 mm 0.06 Smooth, open 20-25 ?m
5 100 0.20 mm 0.06 Smooth 2.5 ?m
CanLab No. Mfr. No. Description
29A2174 1001-6508 Grade 1 Qualitative Filter Paper, Circle, 10mm
74E2121 1001-0155 Grade 1 Qualitative Filter Paper, Circle, 15mm
84E2121 1001-020 Grade 1 Qualitative Filter Paper, Circle, 20mm
79S8980 1001-325 Grade 1 Qualitative Filter Paper, Circle, 25mm
94E2121 1001-025 Grade 1 Qualitative Filter Paper, Circle, 25mm
69S8980 1001-329 Grade 1 Qualitative Filter Paper, Circle, 30mm
05E2121 1001-030 Grade 1 Qualitative Filter Paper, Circle, 30mm
76P8121 1001-032 Grade 1 Qualitative Filter Paper, Circle, 32mm
01B2174 1001-042 Grade 1 Qualitative Filter Paper, Circle, 42.5mm
15E2121 1001-047 Grade 1 Qualitative Filter Paper, Circle, 47mm
51B2174 1001-055 Grade 1 Qualitative Filter Paper, Circle, 55mm
02B2174 1001-070 Grade 1 Qualitative Filter Paper, Circle, 70mm
86P8121 1001-085 Grade 1 Qualitative Filter Paper, Circle, 85mm
52B2174 1001-090 Grade 1 Qualitative Filter Paper, Circle, 90mm
03B2174 1001-110 Grade 1 Qualitative Filter Paper, Circle, 110mm
04B2174 1001-150 Grade 1 Qualitative Filter Paper, Circle, 150mm
54B2174 1001-185 Grade 1 Qualitative Filter Paper, Circle, 185mm
05B2174 1001-240 Grade 1 Qualitative Filter Paper, Circle, 240mm
55B2174 1001-270 Grade 1 Qualitative Filter Paper, Circle, 270mm
06B2174 1001-320 Grade 1 Qualitative Filter Paper, Circle, 320mm
56B2174 1001-385 Grade 1 Qualitative Filter Paper, Circle, 385mm
07B2174 1001-400 Grade 1 Qualitative Filter Paper, Circle, 400 mm
57B2174 1001- 500 Grade 1 Qualitative Filter Paper, Circle, 500 mm
35E2121 1001- 813 Grade 1 Qualitative Filter Paper, Sheet, 26 x 31mm
45E2121 1001- 824 Grade 1 Qualitative Filter Paper, Sheet, 75 x 100mm
22C2174 1001- 917 Grade 1 Qualitative Filter Paper, Sheet, 460 x 570mm
62C2174 1001- 918 Grade 1 Qualitative Filter Paper, Sheet, 460 x 570mm
55E2121 1001- 929 Grade 1 Qualitative Filter Paper, Sheet, 600 x 600mm
79X1121 1001- 931 Grade 1 Qualitative Filter Paper, Sheet, 580 x 680mm
65E2121 1001- 932 Grade 1 Qualitative Filter Paper, Sheet, 580 x 680mm

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