11 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 110 mm (Set of 3 x 100 Discs)

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About 11 Cm Lab Filter Paper, Standard Qualitative Grade

GRADE 4 STANDARD Qualitative Filter Paper Equivalent to Whatman grade 4, 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 RETENTIONRetains 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 : ⌀ 110 mm thickness : 140 μm weight : 86 g/m² ash : 0.1% qty : 300 discs PLAIN-DISCSThese Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.The same affordable filters are also available funnel-ready as ST004-110q (folding) or ST004-110v (pleating). EQUIVALENCE & SIZESee the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.