Your Cart (0)
Thumbnail Filmstrip of Quantitative Filter Paper, Grade DMS40, 7-9um, Medium-Slow, 150mm Circle, Ashless, 100/Pk Images
Featuring an ashless cellulose depth medium made from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100%, this Grade DMS40 quantitative filter paper delivers the low background residue that accurate gravimetric analysis demands. Each 150mm circle provides a medium-slow filtration speed with a nominal particle retention range of 7 to 9 microns and a nominal thickness of 170 microns. With an ash content below 0.007%, the paper can be ashed alongside the sample without compromising weight measurements. The discs ship 100 per pack.
Key Filter Paper Media Characteristics
- Ashless construction with documented ash content below 0.007%, supporting combustion-based gravimetric methods where filter residue must remain negligible
- Nominal particle retention of 7 to 9 microns, suited to collecting medium-sized precipitates during quantitative separations
- Medium-slow filtration speed that balances retention efficiency against throughput for fine precipitates
- Built from refined pulp and pure cotton linters at virtually 100% alpha-cellulose for high purity and chemical consistency
- Nominal basis weight of 85 g/m2 and nominal thickness of 170 microns for uniform mass and reproducible results
Key Construction Characteristics
- Cellulose (cotton linter) composition with an ashless designation for quantitative analysis
- 150mm circular format suited to Buchner funnels and filtration under pressure or vacuum
- Nonsterile, supplied 100 discs per pack
- Comparable to Whatman Grade 40 and Sartorius Grade 5B references
The controlled basis weight and ultra-low ash content together maintain the mass uniformity needed for reproducible gravimetric determinations. Consistent retention and high alpha-cellulose purity preserve sample integrity throughout quantitative separations, clarifications, and precipitate collection.
- Color
- White
- Diameter
- 150mm
- Flow Speed
- Medium-Slow
- Grade
- DMS40
- Material
- Cellulose (cotton linter)
- 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 µm
- Pore Size (µm)
- 7-9
- Qualitative/ Quantitative
- Quantitative
- Sartorius Equivalent
- 5B
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 40
- Gravimetric Analysis The ashless construction with residue below 0.007% allows the filter to be combusted with the sample, protecting the accuracy of weight-based determinations.
- Quantitative Precipitate Collection Its 7 to 9 micron retention captures medium-sized analytical precipitates for accurate quantitative separations.
- Soil and Water Analysis The medium-slow speed and high purity suit separation of solid matter from aqueous extracts in environmental sample preparation.
- Pre-AA Spectrophotometry Clean-Up The high alpha-cellulose purity provides low-contamination clarification of solutions prior to atomic absorption analysis.
- Buchner Funnel and Pressure Filtration The 150mm circle withstands vacuum and pressure filtration setups for routine analytical clarification.
- Fine Precipitate Filtration The medium-slow flow and fine retention support filtration of difficult-to-clarify samples containing fine precipitates.