Qualitative Filter Paper, Grade 04, 20um Retention, 90mm, Cellulose, 100/Pk
GVS SKU: FP090DXF04QALC01

Featuring a hydrophilic cellulose depth medium with a very fast flow rate, these 90mm qualitative filter paper discs deliver 20um nominal particle retention for rapid clarification of routine laboratory samples. The Grade 04 medium is made from refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100%, providing dependable mechanical strength and consistent performance across general filtration tasks.

Key Cellulose Media Characteristics

• Naturally hydrophilic cellulose structure wets out readily for fast, uniform filtration of aqueous samples.
• 20um nominal particle retention captures coarse particles and gelatinous precipitates such as iron, aluminum, and chromium hydroxides.
• Extra fast flow rate speeds throughput where fine particle collection is not critical.
• High loading capacity handles heavily loaded samples and routine clean-up of biological fluids or organic extracts.
• Refined pulp and cotton linter construction with near 100% alpha-cellulose for reliable wet strength.

Key Construction Characteristics

• Format: 90mm circular discs for standard funnels.
• Grade: Qualitative Grade 04, the fastest qualitative grade.
• Sterility: Nonsterile.
• Pack: 100 discs per pack.

The medium maintains consistent retention and flow across the batch, supporting reproducible results in everyday filtration. Its high particulate loading capacity protects downstream steps when processing turbid or heavily laden samples, helping preserve sample integrity throughout the workflow.

Color

White

Diameter

90mm

Flow Speed

Very Fast

Grade

Qualitative Grade 04

Material

Cellulose

Mesh Format

Circle

Pack Count

100

Particle Retention

20um

Pore Size (µm)

20

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wettability

Hydrophilic

• Coarse Precipitate Filtration Captures gelatinous precipitates such as iron, aluminum, and chromium hydroxides during routine analytical work.
• Biological Fluid Clean-Up Provides rapid filtration of biological fluids and organic extracts where fine particle collection is not critical.
• Food Analysis Separates solid foodstuffs from associated liquids in routine food testing procedures.
• Air Pollution Monitoring Suits monitoring of air pollution when the collection of fine particles is not required.
• General Laboratory Clarification Clarifies cloudy or heavily loaded samples quickly thanks to the extra fast flow rate.
• Silica Determination Supports silica determination in steel and iron analysis as a fast qualitative medium.