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Thumbnail Filmstrip of Quantitative Ashless Filter Paper, Slow, 2-4um Retention, 185mm Circle, 100/Pk Images
Featuring an acid-washed cellulose depth medium engineered for critical gravimetric work, this quantitative ashless filter paper delivers a slow flow rate with a 2 to 4 micron retention range across a 185mm circle. The low ash construction reduces residual contamination to a maximum of 0.006 percent, so the paper can be ignited with negligible interference to combusted samples. Each disc measures approximately 160um in thickness with a nominal basis weight of 80 g/m squared, and the pack contains 100 circles.
Key Cellulose Media Characteristics
- Acid-washed cellulose construction reduces ash content to a maximum of 0.006 percent for accurate quantitative results.
- Slow flow rate paired with a 2 to 4 micron retention range captures very fine analytical precipitates.
- Hydrophilic medium wets readily for consistent gravity and vacuum filtration.
- High wet bursting strength supports handling during demanding filtrations and Buchner funnel use.
- Uniform fiber density across the sheet supports reproducible precipitate capture from center to edge.
Key Construction Characteristics
- 185mm diameter circle format suited to standard analytical funnels.
- Nominal thickness of 160um with an 80 g/m squared basis weight.
- Nonsterile, supplied 100 discs per pack.
- Quantitative ashless grade intended for gravimetric and instrumental sample preparation.
This filter paper maintains consistent retention and low blank values for analytical methods where filter contribution must be documented. The slow flow grade is well suited to fine, colloidal precipitates that pass through coarser media, helping preserve gravimetric accuracy. Reliable physical properties across the full disc area support reproducible results in both gravity and vacuum applications.
- Color
- White
- Diameter
- 185mm
- Flow Speed
- Slow
- Grade
- DSL45
- Material
- Cellulose
- Mesh Format
- Circle
- Nominal Ash Content (%)
- 0.006
- Nominal Basis Weight (g/ m²)
- 80
- Nominal Thickness (µm)
- 160
- Pack Count
- 100
- Particle Retention
- 2-4 µm
- Pore Size (µm)
- 25
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Gravimetric Analysis Captures fine analytical precipitates with a low ash blank suitable for ignition and weighing procedures.
- Fine Precipitate Recovery The 2 to 4 micron retention and slow flow collect colloidal precipitates such as barium sulphate and calcium carbonate.
- Total Ash Determination Maximum 0.006 percent ash content provides the ultra-low blank needed for accurate ash measurement.
- Instrumental Sample Preparation Removes fine particulates to protect downstream analytical instrumentation.
- Metals Analysis Recovers fine metal precipitates for gravimetric determination in acidic and slightly alkaline solutions.
- Buchner Funnel Filtration High wet bursting strength supports vacuum-assisted filtration of difficult samples.