Cellulose Qualitative Filter Paper, 7-8um Retention, 70mm, Medium-Slow, Low Ash, 100/Pk
GVS SKU: FP070DMS02QALC01

Featuring a low ash cellulose medium made from refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100%, this 70mm qualitative filter paper disc delivers a 7 to 8 micron nominal particle retention with a medium-slow flow rate. Designated Grade DMS02, it is slightly more retentive and more absorbent than medium-flow grades, providing reliable capture of fine precipitates for routine qualitative analytical work. Each disc measures 190 micron in thickness with a nominal basis weight of 100 g/m2, and the ash content of less than 0.06% is achieved during manufacture without post-treatment.

Key Cellulose Media Characteristics

• Naturally hydrophilic cellulose constructed from refined pulp and pure cotton linters with nearly 100% alpha-cellulose content
• Nominal particle retention of 7 to 8 microns for capturing fine precipitates
• Medium-slow flow rate that balances retention against throughput
• Low ash content of less than 0.06%, not reduced by post-treatment, minimizing sample contamination
• Enhanced absorbency suited to monitoring atmospheric contaminants and soil testing

Key Construction Characteristics

• Circular disc format, 70mm diameter
• Nominal thickness of 190 microns
• Nominal basis weight of 100 g/m2
• Supplied nonsterile, 100 discs per pack

This grade maintains consistent retention and reproducible flow across routine separations, supporting dependable qualitative results. The high alpha-cellulose composition and low ash content help preserve sample integrity for analytical and gravimetric workflows. It is frequently folded for use in analytical funnels and performs reliably for the filtration of fine precipitates.

Color

White

Diameter

70mm

Flow Speed

Medium-Slow

Grade

DMS02

Hardened (Yes/ No)

Yes

Material

Cellulose

Membrane Thickness (µm)

190

Mesh Format

Circle

Nominal Ash Content (%)

<0.06

Nominal Basis Weight (g/ m²)

100

Nominal Thickness (µm)

190

Pack Count

100

Particle Retention

7-8 µm

Pore Size (µm)

7-8

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 2

• Fine Precipitate Filtration Captures fine precipitates such as lead dioxide, calcium fluoride, nickel sulphide, and zinc sulphide with its 7 to 8 micron retention.
• Soil Analysis Provides the absorbency and retention needed for soil testing and seed testing procedures.
• Atmospheric Contaminant Monitoring Collects and retains atmospheric dust and specific contaminants for air pollution monitoring.
• Qualitative Analytical Separations Serves routine laboratory qualitative analysis to determine and identify materials.
• Analytical Funnel Filtration Often used as a folded filter in an analytical funnel for clarifying samples.
• General Laboratory Filtration Supports a wide range of routine laboratory filtrations requiring medium-slow flow and fine retention.