Qualitative Filter Paper 7cm Lab Filter Paper for Chemistry, Standard Qualitative Grade 2-Slow Flow 70mm(100 Discs)

GRADE 2 STANDARD Qualitative Filter Paper
Equivalent to Whatman grade 2, this laboratory filter paper is widely used for standard fine 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.

APPLICATIONS

• science : General filtration in the 8 ?m range, clarification of cloudy suspension in labs
• food : Determination of total fat content in foodstuff and dairy, unsaponifiable fraction in fats and oils (fluted)
• beverage : Beer and malt analysis, removal of turbidity from wort and removal of yeast after fermentation (fluted)
• agriculture : Prefiltration of soil, hold nutrient in plant growth trials
• environment : Air polution monitoring of specific atmospheric contaminants and black smoke

HIGH RETENTION
Retains fine crystalline and organic precipitates around 8μm like:

• Metal Sulfides (Cd, Ni, Zn, Fe, Pb, Mn, Ag, As)
• Ba Sulfate, Pb Chromate, Mg oxide
• Ca Oxalate (cold), Ca Fluoride, Pb Dioxide

SPECS

• paper : pure cotton cellulose
• flow : slow
• retention : 5~10 μm (fine)
• speed : 40~45 s (10ml DIN 53137)
• size : ⌀ 70 mm
• thickness : 160 μm
• weight : 86 g/m²
• ash : 0.1%
• qty : 100 discs

PLAIN-DISCS
Those Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.
The same affordable filters are also available funnel-ready as ST002-70q (folding) or ST002-70v (pleating).

EQUIVALENCE & SIZE
See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.