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Thumbnail Filmstrip of Quantitative Filter Paper, 240mm, 7-9um Retention, Medium-Slow, Ashless, 100/Pk Images
Featuring an ashless quantitative cellulose medium made from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100%, this 240mm filter paper disc delivers medium-slow filtration with a 7-9 um retention range. The paper carries an ash content of less than 0.007%, a nominal thickness of 170 um, and a basis weight of 85 g/m2, making it well suited to critical gravimetric and quantitative analysis where residual ash must be minimized.
Key Cellulose Media Characteristics
- Ashless construction with an ash content of less than 0.007%, supporting accurate gravimetric and quantitative results.
- Medium-slow filtration speed paired with a 7-9 um retention range for capturing fine precipitates.
- Manufactured from refined pulp and pure cotton linters with an alpha-cellulose content near 100% for high purity.
- Hydrophilic cellulose structure with a nominal thickness of 170 um and a basis weight of 85 g/m2.
- Enhanced mechanical strength suitable for Buchner funnels and filtration under pressure.
Key Construction Characteristics
- 240mm diameter disc format for use with large funnels and high-volume filtration setups.
- Quantitative ashless grade designation DMS40 (Whatman Grade 40 equivalent).
- Nonsterile, supplied 100 discs per pack.
This filter paper maintains consistent retention and flow performance across repeated quantitative procedures, helping preserve sample integrity. Its low ash content and high-purity cellulose composition reduce the risk of contamination during ashing and weighing steps. The medium-slow speed balances throughput with the fine particle capture needed for reliable analytical work.
- Color
- White
- Diameter
- 240mm
- Flow Speed
- Medium-Slow
- Grade
- DMS40
- Material
- Cellulose
- Mesh Format
- Disc
- Nominal Ash Content (%)
- <0.007
- Nominal Basis Weight (g/ m²)
- 85
- Nominal Thickness (µm)
- 170
- Pack Count
- 100
- Particle Retention
- 7-9 µm
- Pore Size (µm)
- 7
- Qualitative/ Quantitative
- Quantitative
- Sartorius Equivalent
- 5B
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 40
- Gravimetric Analysis The ashless construction with less than 0.007% ash content supports accurate weighing after ashing for quantitative determinations.
- Fine Precipitate Filtration The 7-9 um medium-slow retention captures finely precipitated analytes such as calcium carbonate.
- Quantitative Sample Preparation High-purity cellulose minimizes contamination during the preparation of samples for analytical methods.
- Buchner Funnel Filtration Enhanced mechanical strength makes the paper suitable for vacuum filtration in Buchner funnels.
- Pressure Filtration The reinforced cellulose structure withstands filtration under pressure for difficult separations.
- General Analytical Clarification The 240mm format handles large-volume clarification of solutions in analytical laboratories.