Quantitative Filter Paper, Grade 40, 7-9um Retention, 42mm, Ashless, 100/Pk
GVS SKU: FP042DMS40QANC01

Featuring a refined cellulose depth medium made from refined pulp and pure cotton linters with an alpha-cellulose content of virtually 100%, this DMS40 grade quantitative ashless filter paper delivers reliable performance for gravimetric and analytical work. The 42mm circles provide a medium-slow filtration speed with a nominal particle retention of 7 to 9 microns and a nominal thickness of 170 microns, making them well suited to the routine clarification and precipitate collection required in quantitative analysis.

Key Cellulose Media Characteristics

• Ashless construction with a nominal ash content of less than 0.007%, protecting accuracy in gravimetric and combustion methods
• Nominal particle retention of 7 to 9 microns for capturing medium to fine precipitates
• Medium-slow filtration speed balancing throughput with retention of finer particulates
• Manufactured from refined pulp and pure cotton linters at nearly 100% alpha-cellulose for high purity and chemical resistance
• Nominal basis weight of 85 g/m2 and 170 micron thickness for consistent mass uniformity

Key Construction Characteristics

• Circular format, 42mm diameter, supplied nonsterile
• Suitable for Buchner funnels and filtration under pressure
• Packaged 100 discs per box

This grade supports accurate, reproducible quantitative analysis where filter residue must remain minimal. The high-purity cellulose maintains sample integrity through clarification and precipitate recovery, while the controlled basis weight provides the mass consistency needed for dependable gravimetric determinations.

Color

White

Diameter

42mm

Flow Speed

Medium-Slow

Grade

DMS40

Material

Cellulose

Mesh Format

Circle

Nominal Ash Content (%)

<0.007

Nominal Basis Weight (g/ m²)

85

Nominal Thickness (µm)

170

Pack Count

100

Particle Retention

7-9 um

Pore Size (µm)

7

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 40

• Gravimetric Analysis The ashless construction with under 0.007% residue allows the filter to be combusted alongside captured precipitates for accurate quantitative mass determination.
• Analytical Precipitate Filtration The 7 to 9 micron retention captures medium to fine analytical precipitates such as finely precipitated calcium carbonate during quantitative separations.
• Soil and Water Analysis Medium-slow flow and high cellulose purity make the paper suitable for separating solid matter from aqueous extracts in environmental sample preparation.
• Buchner Funnel Filtration The paper performs reliably in Buchner funnels and under vacuum or pressure for clarifying laboratory solutions.
• Sample Clarification The depth medium clarifies cloudy suspensions ahead of instrumental analysis while protecting downstream steps from particulates.
• Food and Beverage Analysis The high-purity, low-ash paper supports routine quantitative techniques separating solids from associated liquids.