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7 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 70 mm (100 Discs)
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7 cm Lab Filter Paper, Standard Qualitative Grade 4 Features
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GRADE 4 : 7cm - Equivalent to Whatman qualitative grade 4, standard lab filter paper (70mm)
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FAST PRE-FILTER - Quickly clean-up biological samples and organic extracts, routine clarification
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WINE MAKING - Filtration of musts
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HIGH AIR FLOW COLLECTION - Collect large particulate in fast moving air or fumes
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COARSE RETENTION / FAST FLOW - Retains coarse and gelatinous precipitates (20~25 micron)
About 7 Cm Lab Filter Paper, Standard Qualitative Grade 4
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.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 : ⌀ 70 mmthickness : 140 μmweight : 86 g/m²ash : 0.1%qty : 100 discsPLAIN-DISCSThese Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.The same affordable filters are also available funnel-ready as ST004-70q (folding) or ST004-70v (pleating).EQUIVALENCE & SIZESee the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.
