Qualitative Filter Paper 12.5cm Lab Filter Paper for Chemistry, Standard Qualitative Grade 1-Medium Flow 125mm(100 Discs)

GRADE 1 STANDARD Qualitative Filter Paper
Equivalent to Whatman grade 1, this laboratory filter paper is commonly used in labs where 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 : Routine qualitative analytical separations and liquid clarification in labs
• food : Solid foodstuffs separation and liquid extraction, fat content determination
• beverage : Analysis and filtration of dense liquids like fruit pulps, musts, syrups, oil or plant extracts
• agriculture : Soil analysis and seed testing
• environment : Medium particles collection for pollution monitoring (stain intensity)
• education : Basic qualitative separations teaching and paper chromatography

MEDIUM RETENTION
Retains medium-fine crystalline precipitates like:

• Sulfates (Pb, coarse form of Ba and Ca)
• Carbonates (Ba, Ca)
• Phosphates (Al, Pb, Struvite)
• Chromates (Fe, As, Pb)
• Ca Oxalate (hot), Pb Oxide

SPECS

• paper : pure cotton cellulose
• flow : medium
• retention : 10~15 μm (medium)
• speed : 30~35 s (10ml DIN 53137)
• diam : 125 mm
• thickness : 150 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 ST001-125q (folding) or ST001-125v (pleating).

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