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Whatman™ Qualitative Filter Paper: Grade 4 Circles
Filters and retains coarse particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
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| Catalog Number | Diameter (Metric) |
|---|---|
| 1004-055 | 55 mm |
| 1004-070 | 70 mm |
| 1004-090 | 90 mm |
| 1004-110 | 110 mm |
| 1004-240 | 240 mm |
Catalog number 1004-055
Price (USD)
-
Diameter (Metric):
55 mm
Filters and retains coarse particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
These cellulose filters are used in qualitative analytical techniques to determine and identify materials and for clarifying liquids.
- Particle Retention: 25μm
- Porosity: Coarse
- Filtration speed: Herzberg, 37 sec.
- Surface: smooth
- Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide
- Useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis
Specifications
DescriptionGrade 4 Qualitative Filter Paper Standard Grade, circle, 55 mm
Diameter (English)2.16 in.
Diameter (Metric)55 mm
Filtration Speed37 sec.
Flow RateFast
For Use With (Application)A standard grade filter used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
GradeGrade 4
PorosityMedium
Quantity100 Pk.
Thickness (Metric)210 μm
TypeQualitative Filter Paper
FormatDisc
MaterialCellulose
Particle Retention25 μm
Pore Size20 to 25 μm
Unit SizeEach