Grade 8 Qualitative Filter Paper, Ruled, 45 mm Circle, 100/Pk SKU: 10347004

Qualitative Filter Paper - 10347004

Separating precipitates from analytical solutions requires a cellulose matrix with the right balance of retention and flow rate. Standard basis weight specifications provide predictable filter packing density for volumetric displacement calculations in funnel assemblies. Because of this, documented grade specifications provide laboratories with the technical data needed to select appropriate papers without preliminary testing.

Key Filter Paper Characteristics

• Rated at 4-8um particle retention, the fiber matrix provides a defined cutoff for consistent separation across analytical batches.
• Standard basis weight and thickness specifications provide predictable packing density for volumetric calculations in gravity funnels.
• Manufactured from high-purity cotton linters, qualitative filter paper provides a clean filtration surface with minimal fiber shedding.
• Smooth surface finish supports clear visual inspection of retained material and clean separation from the collected filtrate.
• Uniform fiber distribution across the sheet ensures consistent particle retention from edge to center for reproducible filtration results.

When your analytical procedure specifies a particular grade, the retention and purity characteristics documented above confirm method compliance. Here, rapid wetting and uniform pore distribution reduce the setup time your operators spend preparing each filtration run. Take control of your sample preparation variables and ensure that your data reflects the true nature of your work, rather than the quality of your consumables.

Diameter

45mm

Folded/ Fluted/ Pleated

No

Grade

8 Ruled

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

65g/m²

Pack Count

100

Particle Retention

4-8um

Pore Size (µm)

20.0-30.0

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Pigment Screening - Separates undispersed colorant particles from coating formulations during color development and QC testing.
• Polymer Filtration - Clears particulates from polymer solutions before molecular weight determination by viscometry or GPC.
• Botanical Extraction - Separates plant tissue debris from aqueous and solvent extracts during natural product preparation workflows.
• Soil Extract Filtration - Clarifies soil slurries for nutrient and pH testing, removing fine particles that interfere with analysis.
• Gelatin Clarification - Removes debris from gelatin solutions used in pharmaceutical capsule manufacturing and quality testing.
• Precipitation Recovery - Collects insoluble reaction products on the paper surface for subsequent washing and downstream analysis.