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Thumbnail Filmstrip of Qualitative Filter Paper Discs, Grade 04, 20um Retention, 150mm, Extra Fast, 100/Pk Images
Featuring a hydrophilic cellulose depth medium, these Grade 04 qualitative filter paper discs deliver extra fast filtration with a 20um nominal particle retention. The 150mm diameter circles are well suited to coarse and gelatinous precipitates, providing very high flow rates where the collection of fine particles is not critical. Each pack contains 100 nonsterile discs for routine laboratory work.
Key Cellulose Media Characteristics
- Naturally hydrophilic cellulose structure wets out quickly for fast sample uptake
- 20um nominal particle retention targets coarse particles and gelatinous precipitates such as iron, aluminum, and chromium hydroxides
- Extra fast flow rate provides very high throughput for rapid clarification
- Depth-filtration structure offers excellent loading capacity for heavily laden samples
- Qualitative grade optimized for general-purpose identification and clean-up applications
Key Construction Characteristics
- Diameter: 150mm circles
- Grade: 04 (qualitative, extra fast)
- Format: Nonsterile
- Pack: 100 discs per pack
These discs deliver consistent, reproducible filtration across routine laboratory workflows. The high flow rate and generous loading capacity maintain sample throughput when processing coarse or gelatinous material. Reliable retention performance helps protect downstream steps and supports sample integrity in everyday analytical preparation.
- Diameter
- 150mm
- Flow Speed
- Extra Fast
- Grade
- Qualitative
- Material
- Cellulose
- Mesh Format
- Circle
- Pack Count
- 100
- Particle Retention
- 20um
- Pore Size (µm)
- 20
- Qualitative/ Quantitative
- Qualitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 4
- Coarse Precipitate Filtration Captures coarse and gelatinous precipitates such as iron hydroxide, aluminum hydroxide, and chromium hydroxide.
- Biological Fluid Clean-Up Provides rapid routine clean-up of biological fluids and organic extracts during sample preparation.
- Food Analysis Supports separation of solid foodstuffs from associated liquids in food industry testing.
- Air Pollution Monitoring Suitable for monitoring air pollution where collection of fine particles is not critical.
- Silica Determination Useful for silica determination in steel and iron analysis.
- General Liquid Clarification Delivers fast clarification of liquids that require high flow with coarse retention.