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Whatman™ Glass Microfiber Prefilter, 1μm Particle Retention Rating

Multilayer graded density filters for rapid and efficient filtration of samples with high solids content. Whatman™ Glass Microfiber Prefilters are designed with a coarse glass filter top layer (10μm) meshed with a finer layer. The multigrade glass filter traps larger particles in its pores of the coarse layer, medium-sized particles in the interface meshing, and smaller particles in the interstices of the fine layer.

Manufacturer:  Whatman™ 1841047

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Catalog No. 09-874-82




Prefilter, glass microfiber; Whatman; Grade GMF 150; Borosilicate glass; Multilayer; Binder-free; Flow rate: 3.1s/100ml/1.56cm2; Basis weight: 139; Coarse top layer: 10mm; Particle retention in liquid: 1.2um; Diameter: 47mm

  • Can filter nearly twice as much sample volume as that of a single-density prefilter
  • Compared to an unprotected membrane, three to seven times greater sample volume can be filtered
  • Higher particulate loading capacity and faster flow rates than uniform prefilters
  • Excellent particle retention (both large and small particles)
  • 100% borosilicate glass, binder-free
  • Extends life of final filter membrane
Description & Specifications


3.1 s/100 ml/1.56 cm2
1.5 sec./100mL/1.56cm2
GMF 150
Ideal as prefilters, nearly double filtration volume compared to single-density prefilters
1.8 in.
0.029 in.
Borosilicate glass