Whatman™ Qualitative Filter Papers: Grade 4 Sheets
Filters and retains course particles for monitoring air pollution. Whatman™ Qualitative Filter Papers: Grade 4 Sheets are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
Manufacturer: Whatman™ 1004917
Paper, Filter; Whatman; Qualitative; Circles and sheets; Grade 4; Retains coarse particles; Gelatinous precipitates; Particle retention: 20-25um; Surface: Smooth; Coarse; Filtration speed: Herzberg, 37 seconds; 460 x 570mm dia.
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
|Coarse particles and gelatinous precipitates|
|20 to 25μm|
|570 x 460mm|