Products

PRAT DUMAS Qualitative filter paper, low ash, fast flow rate

Low ash paper (max 0.06%) made of cotton fibers, used for thick and sticky liquids filtration. Surface weight 85 g/m², pore 10 - 12 μm, thickness 200 μm. Available in flat disks and folded. Equivalent to: Whatman 4

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PRAT DUMAS ashless quantitative filter paper, fast flow rate

Ash-free paper (max 0.002%) made exclusively of cellulose cotton fibers. Its quick flow rate makes it recommendable for large precipitates, such as iron hydroxide and other metal sulfates. Surface weight 80 g/m², pore 12 - 16 μm, thickness 250 μm. Available in flat disks. Equivalent to: Whatman 41

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PRAT DUMAS quantitative filter paper, slow flow rate

Ash-free paper (max 0.002%) made exclusively of cellulose cotton fibers. Used for critical gravimetrical analysis. Surface weight 80 g/m², pore 7 - 9 μm, thickness 290 μm. Available in flat disks. Equivalent to: Whatman 42

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PRAT DUMAS quantitative filter paper, medium flow rate

Ash-free paper (max 0.002%) made exclusively of cellulose cotton fibers. Used for routine gravimetrical analysis. Intermediate filter in terms of flow rate and retention. Surface weight 80 g/m², pore 8 - 12 μm, thickness 270 μm. Available in flat disks. Equivalent to: Whatman 40

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PRAT DUMAS hardened quantitative filter paper, slow flow rate

Hardened low ash paper (max 0.02%), as an intermediate solution between quantatitive ash free paper (max 0.002%) and qualitative paper low ash (max 0.06%) for non critical quantitative works. Recommended for thin precipitates, such as barium, lead, zinc or nickel sulfate, barium fluoride or barium hydroxide. High wet resistance. Surface weight 80 g/m², pore 7 - 9 μm, thickness 290 μm. Available in flat disks (foiled bags of 100 disks, with no carton box), or folded (in a carton box). Equivalent to: Whatman 50

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PRAT DUMAS hardened quantitative filter paper, medium flow rate

Hardened low ash paper (max 0.02%), as an intermediate solution between quantatitive ash free paper (max 0.002%) and qualitative paper low ash (max 0.06%) for non critical quantitative works. Medium flow rate is the adequate for a general use, being the intermediate filter in terms of flow rate and retention. High wet resistance. Surface weight 80 g/m², pore 8 - 12 μm, thickness 270 μm. Available in flat disks (foiled bags of 100 disks, with no carton box), or folded (in a carton box). Equivalent to: Whatman 52

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PRAT DUMAS hardened quantitative filter paper, fast flow rate

Hardened low ash paper (max 0.02%), as an intermediate solution between quantatitive ash free paper (max 0.002%) and qualitative paper low ash (max 0.06%) for non critical quantitative works. Its flow rate makes it recommendable for large precipitates, such as iron hydroxyde and other metal sulfates. High wet resistance. Surface weight 80 g/m², pore 12 - 16 μm, thickness 250 μm. Available in flat disks (foiled bags of 100 disks, with no carton box), or folded (in a carton box). Equivalent to: Whatman 54

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Universal pH test papers, roll

Universal pH test paper in rolls 5 m long and 7 mm wide. Each roll is stored in a plastic dispenser with a printed color scale with pH intervals of 1

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Antibiotic control filter paper (antibiograms)

Very thick and absorbent cotton fiber used to determine the suitable antibiotic for a particular infection treatment. Surface weight 420 g/m². Available in flat disks

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Lens and optical elements cleaning tissue

In packs of 100 sheets

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Blaine test filter paper

Special paper for determining the fineness of cement according to EN 196-6:2010 standard. Methods of ciment testing. Determination of fineness. Available in flat disks. Diameters: 12,7 mm or 40,5 mm

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Blotting paper for germination tests

Blotting paper used in laboratory for the tests and the controls of germination. It allows to determine the capacity of germination of seeds. Good absorption capacity (300 %). Paper supplied in wrinkled bands (50 double folds) of 2 m length and 110 mm wide. Color: white, yellow or grey

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