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Thumbnail Filmstrip of Cellulose Filter Paper Discs, Grade 44 Ashless, 2-4um, 150mm, Quantitative, Slow, 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%, these Grade 44 ashless quantitative filter paper discs deliver fine particle retention for critical gravimetric work. Each 150mm disc provides a nominal retention range of 2 to 4 microns at a slow flow rate, with a nominal thickness of 160um and a basis weight of 85 g/m2. Supplied 100 discs per pack.
Key Cellulose Media Characteristics
- Ashless construction with a nominal ash content below 0.007%, supporting accurate ash-free dry weight measurements.
- Manufactured from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100% for high purity.
- Slow flow rate paired with a 2 to 4 micron nominal retention range for capturing fine precipitates.
- Naturally hydrophilic medium suited to quantitative analysis and sample preparation for instrumental methods.
- Thin profile (160um) that lowers the ash weight per sample compared with thicker papers of similar retention.
Key Construction Characteristics
- Cellulose filter paper in a 150mm circular disc format.
- Quantitative, ashless grade designation (Grade 44 equivalent).
- Nonsterile, supplied in packs of 100 discs.
- Suitable for Buchner funnels and filtration under pressure.
These discs maintain consistent retention and low background ash, helping preserve sample integrity through gravimetric separations and analytical preparation. The high alpha-cellulose composition provides reliable mechanical strength and reproducible performance across repeated filtrations.
- Color
- White
- Diameter
- 150mm
- Dimensions
- 150mm diameter
- Flow Speed
- Slow
- Grade
- DSL44
- Material
- Cellulose
- Mesh Format
- Circle
- Nominal Ash Content (%)
- <0.007
- Nominal Basis Weight (g/ m²)
- 85
- Nominal Thickness (µm)
- 160
- Pack Count
- 100
- Particle Retention
- 2-4 um
- Pore Size (µm)
- 2
- Qualitative/ Quantitative
- Quantitative
- Sartorius Equivalent
- 5C
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 44
- Gravimetric Analysis The ashless construction with less than 0.007% ash content supports accurate determination of ash-free dry weight in quantitative gravimetric work.
- Fine Precipitate Collection The 2 to 4 micron nominal retention range captures fine crystalline precipitates during analytical separations.
- Buchner Funnel Filtration The paper is suitable for Buchner funnels and filtration under pressure or vacuum for precipitate recovery.
- Sample Preparation for Instrumental Analysis The high-purity cellulose medium clarifies samples ahead of instrumental analytical methods.
- Quantitative Chemical Analysis The slow flow rate and fine retention make the discs well suited to critical quantitative analytical procedures.