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Thumbnail Filmstrip of Cellulose Quantitative Ashless Filter Paper, 125mm, Medium-Slow, 7-9um Retention, 100/Pk Images
Featuring a high-purity alpha-cellulose depth medium made from refined pulp and pure cotton linters, this 125mm quantitative ashless filter paper disc delivers medium-slow flow with a 7-9um particle retention range for critical gravimetric and analytical work. With a nominal thickness of 170um, a basis weight of 85 g/m2, and an ash content below 0.007%, it minimizes background contamination in procedures where weight measurements of combusted samples must remain accurate. Each pack contains 100 discs.
Key Cellulose Media Characteristics
- Manufactured from refined pulp and pure cotton linters with a virtually 100% alpha-cellulose content for high purity.
- Ashless designation with ash content below 0.007%, preserving the integrity of weight measurements after combustion.
- Medium-slow filtration speed paired with a 7-9um retention range for reliable capture of fine precipitates.
- Hydrophilic structure provides consistent wetting and uniform flow across the disc.
- Depth structure offers dependable retention for difficult quantitative filtrations.
Key Construction Characteristics
- 125mm diameter circular disc format suited to Buchner funnels and pressure-assisted filtration.
- Nominal thickness of 170um with a basis weight of 85 g/m2.
- Nonsterile, supplied 100 discs per pack.
- Quantitative ashless grade equivalent to Whatman Grade 40.
This filter paper provides repeatable retention and low background contamination across gravimetric and quantitative separations. Its medium-slow flow and fine particle retention support accurate recovery of analytical precipitates while maintaining sample integrity throughout demanding laboratory workflows.
- Diameter
- 125mm
- Flow Speed
- Medium-Slow
- Grade
- DMS40
- Material
- Cellulose
- Mesh Format
- Circle
- Nominal Ash Content (%)
- <0.007
- Nominal Basis Weight (g/ m²)
- 85
- Nominal Thickness (µm)
- 170
- Pack Count
- 100
- Particle Retention
- 7-9 um
- Pore Size (µm)
- 7
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 40
- Gravimetric Analysis The ashless construction with under 0.007% ash content ensures weight measurements of combusted samples remain accurate.
- Fine Precipitate Recovery The 7-9um retention range and medium-slow flow reliably capture fine analytical precipitates.
- Soil Analysis Suited to separating solid matter from aqueous extracts in quantitative soil testing.
- Buchner Funnel Filtration The 125mm disc format supports vacuum and pressure-assisted filtration setups.
- AA Spectrophotometry Prep Functions as a high-purity clean-up filter for solutions prior to atomic absorption analysis.
- Quantitative Determination of Sediments Provides dependable retention for trace and sediment recovery in analytical procedures.