24 cm Quadrant-Folded Filter Paper, Pre-Folded disks, Qualitative Grade 4 - ZENPORE Fast Flow 240 mm (50 Discs) 24 cm diameter
24 cm Quadrant-Folded Filter Paper, Pre-Folded disks, Qualitative Grade 4 - ZENPORE Fast Flow 240 mm (50 Discs)
Size:24 cm diameter GRADE 4 Q QUADRANT Qualitative Filter PaperEquivalent 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.APPLICATIONSscience : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labsfood : Determination Sodium Chloride in foodstuffsbeverage : Filtration of musts in winemetalurgy : Determination of silicon impurities in pig iron and steelenvironment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical.COARSE RETENTIONRetains coarse particles and gelatinous precipitates like:Metal hydroxides (Al, Cr, Fe, Mg) , Be OxideInsoluble iron and ore, precipitated SilicatesCulture media, and colloidal sedimentspaper : pure cotton celluloseflow : fastretention : 20~25 μm (coarse)speed : 15~20 s (10ml DIN 53137)size : ⌀ 240 mmthickness : 140 μmweight : 86 g/m²ash : 0.1%qty : 50 discsPRE-FOLDEDThese 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 & SIZESee the cross- reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.
Product Features
- 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)