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    50B

    What is Grade 50B?

    Johnson Test Papers grade 50B is a very thick filter with fine particle filter and good loading capacity. It offers a smaller pore size than 50A with high wet strength. 50B filters are particularly useful for liquid clarification of suspensions loaded with fine particulates and liquid scintillation counting.

    • Nominal pore size of 1.0 µm
    • Appropriate for liquid clarification and/or liquid scintillation
    Johnson Test Papers offer a wide range of glass microfiber filters to support your analyses. See our range of glass, binder-free filters to find the thickness and particle retention for your application.
    50B fine particle filter benefits

    Liquid scintillation counting (LSC) requires a fine particle filter, preferably with a high loading capacity. Grade 50B filters from Johnson Test Papers are ideal for this and similar applications requiring filtration of large volumes such as:

    • Membrane pre-filtration
    • Quantification of solids
    • Waste water analysis
    • liquid clarification for suspended solids analysis.

    Whatman Cross Reference = No.GFB
    Speed class Medium / Fast, very high loading
    Thickness (mm) 0.70
    Pore size (μM) 1.0
    Weight (g/m²) 143
    Filtration Speed (sec*) 200
    Burst Strength (Kg/cm²) 50
    *According to DIN 53137
    Diameter (mm) Product Code
    21 50B021
    24 50B024
    25 50B025
    47 50B047
    55 50B055
    90 50B090
    110 50B110
    125 50B125