VWR®, Quantitative Filter Papers
424: Filtration of lead sulphide, iron sulphide, silver sulphide, alkali carbonate, lead chromate, arsenic, antimony, cadmium and foodstuffs. Determination of sand content in dairy products. Determination of whiteness of pulp in paper mills.
434: Analysis of very fine precipitates such as lead dioxide, calcium fluoride, nickel sulphide, zinc sulphide, cold barium sulphate and cuprous oxide. Determination of insoluble impurities in greases, animal and vegetable oils.
454: Retention of zirconium hydroxide, aluminium hydroxide, cobalt sulphide and other coarse or gelatinous precipitates.
474: General quantitative analyses. Also for filtration of aluminium phosphate, zinc ammonium phosphate and silver chromate.
- Grade:434
- Seq:12
- Size:185 mm
- Thickness:0,14 mm
- Cat. No.:516-0275
- Min. pore size:9 µm
- Wet burst strength:3,5 psi
- Filtration speed:2500 s (Herzberg)
- Particle retention:2 - 3 µm
- Dry burst strength:18 psi
- Max. pore size:20 µm
- Weight:84 g/m²
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