Grade 8 Qualitative Filter Paper, Ruled, 90mm Circle, 100/Pk SKU: 10347009

Qualitative Filter Paper - 10347009

Sample clarification before instrumental analysis starts with a filter paper that captures interfering particles without introducing extractable contamination. Medium retention grades capture suspended solids while maintaining flow rates suitable for routine laboratory sample throughput requirements. With this in mind, lot-level verification of retention, thickness, and ash content ensures predictable performance when scaling from method development to routine analysis.

Key Filter Paper Characteristics

• At 4-8um rated retention, the fiber matrix captures particles above the threshold while allowing smaller materials to pass through.
• Smooth surface finish supports clear visual inspection of retained material and clean separation from the collected filtrate.
• Pure cellulose fiber construction without hardening treatment ensures minimal chemical background in filtered samples.
• Manufactured from high-purity cotton linters, qualitative filter paper provides a clean filtration surface with minimal fiber shedding.
• Pure cellulose fiber construction delivers consistent flow rates and predictable retention for general sample clarification and preparation.

Whether your method requires simple clarification or precise gravimetric determination, the documented specifications above define what this paper delivers. For exactly this reason, sheet-to-sheet consistency means your training investment carries forward as new staff learn the same predictable filtration behavior. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

90mm

Folded/ Fluted/ Pleated

No

Grade

8 Ruled

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

65g/m²

Particle Retention

4-8um

Pore Size (µm)

20.0-30.0

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Lysate Clarification - Separates cellular debris from crude lysates before downstream chromatographic or electrophoretic analysis.
• Teaching Laboratory - Provides consistent and economical filtration media for student exercises in analytical and general chemistry.
• Paint and Coatings QC - Removes gels and undispersed pigment from coating samples prior to color measurement and viscosity testing.
• Soil Extract Filtration - Clarifies soil slurries for nutrient and pH testing, removing fine particles that interfere with analysis.
• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.
• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.