18.5 cm Quadrant-Folded Filter Paper, Pre-Folded disks, Qualitative Grade 2 - ZENPORE Slow Flow 185 mm (50 discs)

GRADE 2 Q QUADRANT Qualitative Filter Paper
Equivalent to Whatman grade 2 FF, 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 : ⌀ 185 mm
• thickness : 160 μm
• weight : 86 g/m²
• ash : 0.1%
• qty : 50 discs

PRE-FOLDED
Those Quadrant Folded Filters saves folding time when filtration is done repetitively.
Use our pleating equivalent ST002-185v for even faster filtration.
Suitable for gravity filtration in standard funnels, not vacuum.

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