Grade 4 Qualitative Filter Paper, Standard, 580x580mm Sheet, 100/Pk SKU: 1004-930

Qualitative Filter Paper - 1004-930

Sample clarification before instrumental analysis starts with a filter paper that captures interfering particles without introducing extractable contamination. Uniform pore distribution across the sheet area ensures consistent particle capture from center to edge during gravity filtration. Consistent physical properties across the full sheet area support uniform filtration results in both gravity and vacuum applications.

Key Filter Paper Characteristics

• At 92g/m² nominal basis weight, the paper provides the mass uniformity needed for reproducible gravimetric determinations.
• Non-hardened cellulose delivers the flow rates and retention that routine methods require at practical cost per determination.
• 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.
• Standard basis weight and thickness specifications provide predictable packing density for volumetric calculations in gravity funnels.

If your teaching or research laboratory processes high volumes of routine samples, the documented flow rates above translate directly to throughput. With these demands in mind, rapid wetting and uniform pore distribution reduce the setup time your operators spend preparing each filtration run. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Dimensions

580 x 580mm

Flow Speed

Fast

Folded/ Fluted/ Pleated

No

Grade

4

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

0.06%

Nominal Basis Weight (g/ m²)

92g/m²

Particle Retention

25um

Pore Size (µm)

20.0-25.0

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Soil Extract Filtration - Clarifies soil slurries for nutrient and pH testing, removing fine particles that interfere with analysis.
• Lysate Clarification - Separates cellular debris from crude lysates before downstream chromatographic or electrophoretic analysis.
• 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.
• Teaching Laboratory - Provides consistent and economical filtration media for student exercises in analytical and general chemistry.
• Precipitation Recovery - Collects insoluble reaction products on the paper surface for subsequent washing and downstream analysis.