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Qualitative Filter Paper 15 cm Quadrant Folded Filter Paper, Qualitative Grade 4 - ZENPORE Fast Flow 150 mm (50 Discs)

4.7 (4) Write Review
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$10.50

$ 4 .99 $4.99

In Stock

1.Size:12.5 Cm Diameter


  • GRADE 4 Q : 15cm - Equivalent to Whatman qualitative grade 4 FF, quadrant folded filter paper (150mm)
  • PREFOLDED - No more folding! These pre-folded Quadrant filters are ready for the funnel
  • FAST PRE-FILTER - Quickly clean-up biological samples and organic extracts, routine clarification
  • WINE MAKING - Filtration of musts
  • COARSE RETENTION / FAST FLOW - Retains coarse and gelatinous precipitates (20~25 micron)


GRADE 4 Q QUADRANT Qualitative Filter Paper
Equivalent to Whatman grade 4 FF, this very fast laboratory filter paper is used for coarse filtration when you need to separate a solid or precipitate from the filtrate.
Made from high alpha-cellulose cotton, this standard lab filter is not intended for ashing.

APPLICATIONS

  • science : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labs
  • food : Determination Sodium Chloride in foodstuffs
  • beverage : Filtration of musts in wine
  • metalurgy : Determination of silicon impurities in pig iron and steel
  • environment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical.

  • COARSE RETENTION
    Retains coarse particles and gelatinous precipitates like:

    • Metal hydroxides (Al, Cr, Fe, Mg) , Be Oxide
    • Insoluble iron and ore, precipitated Silicates
    • Culture media, and colloidal sediments

      • paper : pure cotton cellulose
      • flow : fast
      • retention : 20~25 μm (coarse)
      • speed : 15~20 s (10ml DIN 53137)
      • size : ⌀ 150 mm
      • thickness : 140 μm
      • weight : 86 g/m²
      • ash : 0.1%
      • qty : 50 discs

        PRE-FOLDED
        These         Quadrant Folded Filters saves folding time when filtration is done repetitively.
        Use our pleating equivalent         ST004-150v for even faster filtration.
        Suitable for gravity filtration in standard funnels, not vacuum.

        EQUIVALENCE & SIZE
        See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.


Carlos T.
Reviewed in the United States on December 27, 2023
Fits perfect on the 75 mm glass funnel. Came well packed with Styrofoam cutouts.
Carlos T.
Reviewed in the United States on December 27, 2023
Fits perfect on the 75 mm glass funnel. Came well packed with Styrofoam cutouts.
John E. Miller
Reviewed in the United States on June 24, 2021
It performed as I expected and was just what I needed!!
John E. Miller
Reviewed in the United States on June 24, 2021
It performed as I expected and was just what I needed!!