Cellulose Quantitative Filter Paper Discs, Ashless, Fast, 20-25um, 110mm, 100/Pk
GVS SKU: FP110DFA41QANC01

Featuring an ashless cellulose depth medium made from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100%, this 110mm quantitative filter paper disc delivers fast filtration with a 20-25um particle retention range. The 190um thick paper combines high throughput with the purity required for gravimetric work, exhibiting an ash content of less than 0.007% so that filter blank contributions stay negligible. Each disc draws distilled water through in approximately 21 seconds, making it the fast end of the quantitative ashless range.

Key Cellulose Media Characteristics

• Ashless purity: Ash content of less than 0.007% supports accurate gravimetric and quantitative analysis with minimal blank correction.
• Fast flow: Coarse 20-25um retention range provides high-throughput filtration of coarse particles and gelatinous precipitates.
• High-purity construction: Made from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100%.
• Naturally hydrophilic: Cellulose matrix wets readily with aqueous samples for consistent filtration.
• Mechanical strength: Wet bursting strength of 40 kPa supports filtration under vacuum or pressure.

Key Construction Characteristics

• Format: 110mm diameter circular disc.
• Thickness: 190um.
• Grade: Quantitative ashless, fast (DFA41), equivalent to Whatman Grade 41 and Sartorius Grade 5A.
• Nonsterile, packaged 100 discs per box.
• Suitable for Buchner funnels and filtration under pressure.

The defined 20-25um retention profile delivers consistent separation across analytical batches while maintaining rapid flow. With its high-purity cellulose construction and very low ash content, this paper preserves sample integrity and supports reproducible gravimetric results in routine and environmental laboratory workflows.

Burst Pressure (psi)

40 kPa wet bursting strength

Color

White

Diameter

110mm

Flow Speed

Fast

Grade

DFA41

Material

Cellulose

Mesh Format

Circle

Nominal Ash Content (%)

<0.007

Nominal Basis Weight (g/ m²)

85

Nominal Thickness (µm)

190

Pack Count

100

Particle Retention

20-25 µm

Pore Size (µm)

20-25

Qualitative/ Quantitative

Quantitative

Sartorius Equivalent

5A

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 41

• Gravimetric Analysis Collects coarse precipitates for ignition and weighing with negligible filter blank contribution thanks to the <0.007% ash content.
• Coarse Precipitate Filtration Rapidly retains gelatinous precipitates such as iron or aluminum hydroxides at the 20-25um retention range.
• Air Pollution Analysis Serves as a fast quantitative medium for collecting particulate and gaseous compounds at high flow rates.
• Environmental Sample Prep Filters soils and sludges for metals analysis after acid digestion where throughput is a priority.
• Pressure and Vacuum Filtration Withstands Buchner funnel and pressure filtration with a 40 kPa wet bursting strength.
• High-Throughput Clarification Provides fast clarification of heavily loaded aqueous samples where moderate retention is acceptable.