Qualitative Filter Paper Discs, 5um Retention, 70mm, Medium-Slow, Nonsterile, 100/Pk
GVS SKU: FP070DMS03QLTC01

Featuring a hardened, 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 is supplied in the DMS03 grade, a medium-slow filtration paper with a nominal particle retention of 5 to 7 microns. The extra-thick construction, roughly double the thickness of the standard DME01 grade, increases wet strength and supports a higher solute loading, making it well suited to liquids that are difficult to clarify. Each disc measures 70mm in diameter with a thickness of 0.32mm, and the papers are packaged 100 per box.

Key Cellulose Media Characteristics

• Nominal retention range of 5 to 7 microns delivers fine particle retention with a medium-slow filtration speed.
• Hydrophilic cellulose structure wets readily for consistent flow through the depth medium.
• Low ash content below 0.06% is inherent to the material and is not reduced by post-treatment.
• Extra thickness provides increased wet strength and a higher solute loading capacity for heavily loaded samples.
• Refined pulp and pure cotton linter composition gives nearly 100% alpha-cellulose for reliable qualitative work.

Key Construction Characteristics

• Material: hardened, low ash cellulose filter paper.
• Format: 70mm circular disc, 0.32mm thick.
• Grade: DMS03, medium-slow (thick) filtration.
• Sterility: Nonsterile.
• Pack: 100 discs per box.

This grade is preferred for liquids that are hard to clarify, including essences, oils, and tinctures, where the additional thickness helps maintain flow under heavier particulate loads. The medium-slow speed balances retention against throughput, and the consistent cellulose structure supports repeatable separations across routine qualitative analyses.

Diameter

70mm

Flow Speed

Medium-Slow

Grade

DMS03

Hardened (Yes/ No)

Yes

Material

Cellulose

Mesh Format

Circle

Nominal Ash Content (%)

<0.06

Nominal Thickness (µm)

320

Pack Count

100

Particle Retention

5-7 um

Pore Size (µm)

5

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wettability

Hydrophilic

• Clarification of Difficult Liquids Effectively clarifies essences, oils, tinctures, and other samples that are hard to filter, using the extra-thick depth medium.
• Fine Precipitate Filtration Retains fine precipitates in routine qualitative separations with a 5 to 7 micron nominal retention.
• Buchner Funnel Filtration Suited to filtration under vacuum or pressure where increased wet strength is beneficial.
• Soil and Environmental Testing Supports soil analysis and contaminant monitoring where higher solute loading is required.
• General Laboratory Filtration Provides reliable medium-slow filtration for everyday qualitative laboratory work.
• Education and Teaching Labs Used to demonstrate simple qualitative analytical separations in instructional settings.