Cellulose Filter Paper, Grade 41, Ashless Fast, 240mm, Quantitative, Nonsterile, 100/Pk
GVS SKU: FP240DFA41QANC01

Featuring an ashless quantitative cellulose medium made from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100%, this Grade 41 (DFA41) filter paper delivers the fastest filtration speed in the quantitative ashless range. The 240mm disc carries a nominal particle retention of 20 to 25 micrometers and a nominal thickness of 190 micrometers, making it well suited to coarse particles and gelatinous precipitates such as iron or aluminum hydroxides. With an ash content below 0.007%, it maintains the purity required for accurate gravimetric analysis. Each box contains 100 discs.

Key Cellulose Media Characteristics

• Hydrophilic cellulose medium made from refined pulp and pure cotton linters with virtually 100% alpha-cellulose content.
• Nominal particle retention range of 20 to 25 micrometers for fast, high-throughput quantitative filtration.
• Ashless construction with an ash content below 0.007% to avoid introducing contaminants during gravimetric work.
• Coarse porosity and fast flow rate ideal for coarse particles and gelatinous precipitates.
• Nominal basis weight of 85 g/m squared and a nominal thickness of 190 micrometers.

Key Construction Characteristics

• Quantitative ashless grade (DFA41), the fast flow option in the GVS quantitative range.
• 240mm circular disc format suitable for Buchner funnels and filtration under pressure.
• Nonsterile, supplied 100 discs per box.

This filter paper provides consistent, reliable performance for routine and analytical filtration where maximum throughput is a priority. Its very low ash content supports accurate gravimetric measurements and preserves sample integrity. The fast flow rate makes it an efficient choice for processing heavily loaded samples without sacrificing quantitative-grade cleanliness.

Diameter

240mm

Flow Speed

Fast

Grade

DFA41 (Grade 41 equivalent)

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

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 41

• Gravimetric Analysis Its ashless construction and very low ash content support accurate weight measurements of combusted samples.
• Coarse Precipitate Filtration The 20 to 25 micrometer retention and fast flow rate suit coarse and gelatinous precipitates such as iron and aluminum hydroxides.
• Air Pollution Monitoring Used in quantitative air pollution analysis for high flow rate collection of gaseous compounds.
• Environmental Sample Prep Suited to preparation of solid environmental samples such as soils and sludges for downstream metals analysis.
• High-Throughput Quantitative Filtration The fast flow rate enables rapid routine quantitative filtration where moderate retention is acceptable.
• Buchner Funnel Filtration Compatible with Buchner funnels and filtration under pressure for general analytical work.