Feature(may vary by option.)

●GRADE 4 Q : 24cm - Equivalent to Whatman qualitative grade 4 FF, quadrant folded filter paper (240mm)
●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)

[24 cm diameter]

Description

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 : ⌀ 240 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 ST004-240v 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.