Whatman
0903 450x450mm 500/Pk SKU: 10334885

Qualitative Filter Paper - 10334885

Sample clarification before instrumental analysis starts with a filter paper that captures interfering particles without introducing extractable contamination. Controlled fiber density produces documented flow rate and retention characteristics that remain consistent across production lots. Certificate of conformance documentation accompanies each lot, providing traceability for quality systems and regulatory audit requirements.

Key Filter Paper Characteristics

• Standard qualitative cellulose filter paper provides reliable particle retention for gravity and vacuum filtration across routine laboratory workflows.
• Wet strength sufficient for gentle handling during precipitate transfer while maintaining the rapid flow rates of qualitative grades.
• Rated at Small Particles particle retention, the fiber matrix provides a defined cutoff for consistent separation across analytical batches.
• Medium porosity cellulose matrix captures suspended solids while maintaining the throughput needed for efficient batch processing.
• Available in precut circles and sheet stock to match funnel sizes and custom cutting requirements across laboratory applications.

If your teaching or research laboratory processes high volumes of routine samples, the documented flow rates above translate directly to throughput. To address this, standard qualitative construction integrates into your existing funnel hardware, requiring no new equipment investment for reliable results. 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.

Dimensions

450 x 450mm

Flow Speed

Medium Slow

Folded/ Fluted/ Pleated

No

Grade

903

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Basis Weight (g/ m²)

65g/m²

Pack Count

500

Particle Retention

Small Particles

Pore Size (µm)

4.0-7.0

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• General Clarification - Removes suspended solids from aqueous solutions by gravity filtration for routine sample preparation.
• Precipitation Recovery - Collects insoluble reaction products on the paper surface for subsequent washing and downstream analysis.
• 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.
• Gelatin Clarification - Removes debris from gelatin solutions used in pharmaceutical capsule manufacturing and quality testing.
• Pigment Screening - Separates undispersed colorant particles from coating formulations during color development and QC testing.