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Thumbnail Filmstrip of Cellulose Filter Paper Discs, 90mm, Qualitative, Medium-Slow, 7-8um, Low Ash, 100/Pk Images
Featuring a low ash hardened cellulose medium made from refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100%, this 90mm qualitative filter paper disc delivers medium-slow filtration with a 7 to 8 micron particle retention. The 190um thick sheet provides increased absorbency and solute loading capacity, making it well suited to the filtration of fine precipitates and routine qualitative analytical separations. Each pack contains 100 discs.
Key Cellulose Media Characteristics
- Manufactured from refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100% for consistent, reliable filtration.
- Provides a nominal particle retention of 7 to 8 microns with a medium-slow filtration speed.
- Low ash content of less than 0.06%, not reduced by post-treatment, minimizing contamination of analytical samples.
- Slightly more retentive and absorbent than a standard medium-grade paper, with a corresponding increase in filtration time.
- Hardened construction supports use as a folded filter in analytical funnels and improves wet handling.
Key Construction Characteristics
- Disc format, 90mm diameter, for use in standard funnels and filtration setups.
- Nominal thickness of 190um with a basis weight of 100 g/m2.
- Nonsterile, supplied 100 discs per pack.
This qualitative grade delivers dependable separation of fine precipitates and clarification of routine laboratory samples. The low ash, high alpha-cellulose composition maintains sample integrity across gravimetric and analytical workflows, while the absorbent hardened sheet withstands wet handling during filtration.
- Diameter
- 90mm
- Flow Speed
- Medium-Slow
- Grade
- DMS02
- Hardened (Yes/ No)
- Yes
- Material
- Cellulose
- Membrane Thickness (µm)
- 190
- Mesh Format
- Circle
- Nominal Ash Content (%)
- <0.06
- Nominal Basis Weight (g/ m²)
- 100
- Nominal Thickness (µm)
- 190
- Pack Count
- 100
- Particle Retention
- 7-8 µm
- Pore Size (µm)
- 7-8
- Qualitative/ Quantitative
- Qualitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 2
- Fine Precipitate Filtration Captures fine precipitates such as lead dioxide, calcium fluoride, nickel sulphide and zinc sulphide with its 7 to 8 micron retention.
- Soil Analysis Supports soil testing procedures where consistent medium-slow filtration of particulate-laden samples is needed.
- Atmospheric Contaminant Monitoring Used for monitoring specific contaminants in the atmosphere via dust collection and stain measurement.
- Qualitative Analytical Separations Serves routine qualitative analytical techniques to determine and identify materials.
- Liquid Clarification Clarifies routine laboratory liquids where fine particle removal and absorbency are beneficial.
- Folded Funnel Filtration Frequently used as a folded filter in analytical funnels thanks to its hardened, absorbent structure.