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BRANCHIA ashless quantitative filter paper, medium-low flow rate

Ashless paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 40

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BRANCHIA ashless quantitative filter paper, high flow rate

Ashless paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 41

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BRANCHIA ashless quantitative filter paper, very low flow rate

Ashless paper (< 0.007%) made of cotton fibers. Very low flow rate, adequate for fine particles retention. Suitable for precipitate filtration of cold barium sulphate, lead sulphate, zinc and nickel sulphides, etc. Weight 100 g / m², thickness 160 μm, filtration time 300 s, retention 2 - 3 μm, wet bursting strength > 20 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 42

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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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BRANCHIA hardened quantitative filter paper, slow flow rate

Hardened low ash paper ( 30 kPa. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 50

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BRANCHIA hardened quantitative filter paper, medium flow rate

Hardened low ash paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 52

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BRANCHIA hardened quantitative filter paper, high flow rate

Hardened low ash paper ( 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 54

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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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