Cellulose Quantitative Filter Paper Discs, Ashless, Slow, 110mm, Grade 44, 100/Pk
GVS SKU: FP110DSL44QANC01

Featuring a high-purity ashless cellulose medium engineered for critical gravimetric analysis, these 110mm quantitative filter paper discs deliver a slow flow rate with a fine 2 to 4 micron nominal particle retention. The Grade 44 (DSL44) construction measures 160 microns (0.16mm) thick with a nominal basis weight of 85 g/m2, and carries a nominal ash content below 0.007 percent so it leaves virtually no residue after ashing. As a thin, fine-retention paper, it captures very fine crystalline precipitates while providing faster filtration than thicker papers of comparable retention.

Key Cellulose Media Characteristics

• Ashless purity: nominal ash content below 0.007 percent supports accurate ash-free dry mass measurements.
• Fine retention: 2 to 4 micron nominal particle retention captures very fine crystalline precipitates such as barium sulfate.
• Slow flow rate: the slow-speed structure favors high retention for difficult, fine-particle filtrations.
• Thin profile: 160 micron thickness reduces overall ash weight per sample and speeds filtration versus thicker papers of similar retention.
• Hydrophilic medium: naturally wettable cellulose for aqueous sample handling.

Key Construction Characteristics

• Material: high-purity ashless cellulose.
• Format: 110mm diameter circles.
• Grade: DSL44 (Grade 44), quantitative ashless, slow speed.
• Basis weight: 85 g/m2.
• Packaging: 100 discs per pack, nonsterile.

These discs provide consistent, repeatable retention for demanding analytical workflows where gravimetric accuracy is paramount. The low ash content and fine porosity maintain sample integrity through ashing and weighing steps. Suitable for Buchner funnel use and filtration under vacuum, the medium supports reliable separation of fine precipitates from solution.

Diameter

110mm

Flow Speed

Slow

Grade

DSL44 (Grade 44)

Material

Cellulose

Membrane Thickness (µm)

160

Mesh Format

Circle

Nominal Ash Content (%)

<0.007

Nominal Basis Weight (g/ m²)

85

Nominal Thickness (µm)

160

Pack Count

100

Particle Retention

2-4 µm

Pore Size (µm)

2-4

Qualitative/ Quantitative

Quantitative

Sartorius Equivalent

5C

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 44

• Gravimetric Analysis The ashless cellulose medium with under 0.007 percent ash supports accurate ash-free dry mass determinations.
• Fine Precipitate Retention The 2 to 4 micron fine retention captures very fine crystalline precipitates such as barium sulfate and metastannic acid.
• Buchner Funnel Filtration The paper is suited to vacuum-assisted filtration on Buchner and three-piece funnels.
• Sample Preparation for Instrument Analysis Clean-up filtration of solutions prior to spectroscopic or instrumental analysis.
• Quantitative Inorganic Analysis Reliable retention and low residue support inorganic gravimetric determinations.
• Difficult Slow Filtrations The slow flow rate and high retention handle demanding fine-particle separations.