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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.

Properties
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
Available Sizes
Diameter (mm) Product Code
21 50B021
24 50B024
25 50B025
47 50B047
55 50B055
90 50B090
110 50B110
125 50B125