Quantitative Filter Papers

Microclar quantitative filter papers have been designed for their use in techniques that allow quantification of particles suspended in a liquid. They are ashless and show a very high resistance in humid state. They are manufactured using reverse osmosis water and are treated with diluted acids in order to eliminate all organic and inorganic impurities.

CN-541 Series

Features

Filtration capacity: Fast (9 s).
Weight: 85 g/m2.
Thickness: 0,20 mm.
Average retention capacity: 7-12 μ.
Residual ash content: 0,01%.

Uses

General quantitative analysis, especially for gravimetric determinations of flocculent or gelatinous precipitates as
iron hydroxide, zirconium, aluminum and cobalt sulfur. It can also be used in atmospheric contamination controls to determine gaseous components. Its use is also recommended for fast analytical methods of unstable precipitates as silica.
Other uses include bauxite analysis, alkaline metals in varnish or enamels and in paper analysis.

CN-542 Series

Features

Filtration capacity: Slow (140 s).
Weight: 85 g/m2.
Thickness: 0,17 mm.
Average retention capacity: 2-4 μ.
Residual ash content: 0,01%.
Band: Blue.

Uses

Special for gravimetric determinations of very fine particle precipitates as those from barium and lead sulfate,
copper oxide, zinc and nickel sulfide, calcium oxalate and fluoride. Specific for quantitative determination of
alkaline metals in enamel and varnish, determinations of stain assays with stains (from reactive strips) and fine
crystals coming from sulfates.

CN-544 Series

Features

Filtration capacity: Medium-Slow (100 s).
Weight: 70 g/m2.
Thickness: 0,16 mm.
Average retention capacity: 4-7 μ.
Residual ash content: 0,01%.
Band: Red.

Uses

General quantitative analysis, special for gravimetric determinations of precipitates such as (hot) barium
sulfate, barium chromate or calcium oxalate.