Whatman qualitative filter paper, Grade 4 sheets, pack of 100

SKU:
WHA1004917
  • $337.00

    • Description

    Whatman qualitative filter paper, Grade 4 sheets, W × L 460 mm × 570 mm, pack of 100

    Synonym(s):
    Whatman filter, Whatman filters, Whatman paper, Z695246, filter paper, filter papers, paper filter
    NACRES:
    NB.24

    PROPERTIES

    material

    cellulose
    sheets

    feature

    Grade 4

    packaging

    pack of 100

    manufacturer/tradename

    Whatman 1004-917
    Whatman Article No. 28414029 (US reference)

    parameter

    0.22 psi wet burst
    37 sec/100 mL speed (Herzberg)

    W × L

    460 mm × 570 mm

    thickness

    205 μm

    ash

    ≤0.06%

    pore size

    20-25 μm (Particle retention)

    basis weight

    92 g/m2

    DESCRIPTION

    General description

    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 4: 20-25 μm, (very fast filter paper)
    Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

    Other Notes

    Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.

    Legal Information

    Whatman is a registered trademark of Cytiva