Quantitative Ashless Filter Paper, Grade 44, Slow, 240mm, 100/Pk
GVS SKU: FP240DSL44QANC01

Featuring a high-purity cellulose medium made from refined pulp and cotton linters, this Grade 44 quantitative ashless filter paper delivers slow flow with fine particle retention for critical analytical work. Supplied as 240mm circular discs in packs of 100, the paper is acid-washed to an extremely low ash content, making it well suited to gravimetric analysis where ash-free dry weight measurements are essential.

Key Cellulose Media Characteristics

• Ashless quantitative grade with maximum ash content of 0.007 percent for grades 40 to 44, minimizing contamination in gravimetric work.
• Slow filtration speed paired with fine retention for reliable collection of fine precipitates such as barium sulphate and finely precipitated calcium carbonate.
• Manufactured from refined pulp and pure cotton linters with a high alpha-cellulose content.
• Acid-washed construction provides high purity and consistent, reproducible filtration behavior.
• As a thin version of Grade 42 paper, the reduced thickness lowers overall ash weight per sample and supports faster filtration of fine particles than thicker papers of similar retention.

Key Construction Characteristics

• Circular disc format, 240mm diameter, for use in standard funnels.
• Quantitative ashless grade (Grade 44, slow speed).
• Nonsterile.
• Packaged 100 discs per box.
• Suitable for Buchner funnels and pressure or vacuum-assisted filtration.

This paper provides dependable separation of fine precipitates while maintaining sample integrity through its low-ash, high-purity construction. The consistent pore structure and slow, controlled flow help ensure accurate, reproducible results across demanding analytical filtration procedures.

Color

White

Diameter

240mm

Flow Speed

Slow

Grade

44

Material

Cellulose

Mesh Format

Circle

Pack Count

100

Pore Size (µm)

2

Qualitative/ Quantitative

Quantitative

Sartorius Equivalent

391

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 44

• Gravimetric Analysis The ashless, low-ash construction supports accurate ash-free dry weight measurements of collected precipitates.
• Fine Precipitate Filtration Slow flow and fine retention reliably capture fine analytical precipitates such as barium sulphate and finely precipitated calcium carbonate.
• Sample Preparation for Instrumental Analysis Clarifies and prepares samples prior to downstream instrumental measurement.
• Pressure and Vacuum Filtration Suitable for Buchner funnel and pressure-assisted setups requiring controlled, fine filtration.
• Quantitative Chemical Analysis The high-purity cellulose medium delivers reproducible results for exacting quantitative laboratory work.
• Critical Analytical Filtration The very pure, acid-washed paper supports a wide range of demanding analytical filtration procedures.