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Thumbnail Filmstrip of Quantitative Ashless Filter Paper, Grade 43, 14-17um Retention, Medium, 70mm, 100/Pk Images
Featuring a high-purity cellulose depth medium made from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100%, this quantitative ashless filter paper delivers the medium flow rate and 14 to 17 micron particle retention of Grade 43. Each 70mm disc captures particulate within the random matrix of cellulose fibers, providing an intermediate balance of retention and speed that suits routine, high-volume analytical filtration. With an ash content of less than 0.007%, the paper can be ashed during gravimetric analysis without contributing substantially to the measured weight.
Key Cellulose Media Characteristics
- Naturally hydrophilic cellulose depth medium that wets readily with aqueous samples
- Medium flow rate with 14 to 17 micron nominal particle retention, intermediate within the quantitative family
- Ashless purity with less than 0.007% ash content for accurate gravimetric and inorganic analysis
- Manufactured from refined pulp and pure cotton linters with near 100% alpha-cellulose content
- Approximately 180 micron thickness and 85 g/m2 basis weight for consistent loading capacity
Key Construction Characteristics
- 70mm diameter circle format
- Quantitative ashless grade, suitable for Buchner funnels and filtration under pressure
- Nonsterile
- Supplied 100 per pack
This filter paper maintains consistent retention and flow across repeated filtrations, supporting reproducible gravimetric results. Its low ash content preserves sample integrity through combustion steps, making it dependable for soil analysis, water testing, and air sample preparation.
- Color
- White
- Diameter
- 70mm
- Flow Speed
- Medium
- Grade
- DME43 (Grade 43)
- Material
- Filter Paper
- Mesh Format
- Circle
- Nominal Ash Content (%)
- <0.007
- Nominal Basis Weight (g/ m²)
- 85
- Nominal Thickness (µm)
- 180
- Pack Count
- 100
- Particle Retention
- 14-17 µm
- Pore Size (µm)
- 14-17
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 43
- Gravimetric Analysis The less than 0.007% ash content allows the paper to be combusted with minimal residue for accurate weight-based quantitative measurements.
- Inorganic Sample Preparation Medium retention and ashless purity make it well suited to preparing inorganic samples for instrumental analysis.
- Soil Analysis The 14 to 17 micron retention captures particulate from soil extracts for routine agricultural and environmental testing.
- Surface Water Testing Clarifies aqueous samples by entrapping suspended solids during water quality procedures.
- Air Sample Monitoring Collects airborne particulate on a high-purity matrix for subsequent gravimetric or fluorescence analysis.
- Buchner Funnel Filtration The quantitative grade withstands filtration under vacuum or pressure for recovery of medium-coarse precipitates.