Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles

Description

• 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