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

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Catalog No. 09-825P

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    Width (Metric) 460mm
    Dimensions (L x W) 570 x 460mm
    Length (Metric) 570mm
    Pore Size (Metric) 20 to 25μm
    Particle Retention Coarse particles and gelatinous precipitates
    Quantity 100Pack
    Thickness (Metric) 210μm
    Flow Rate Fast
    Format Sheet
    Grade 4


    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

  • Description & Specifications

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