Qualitative Filter Paper Discs, Grade DXS05, 3um Retention, 42mm, Ashless Hardened, 100/Pk
GVS SKU: FP042DXS05QALC01

Featuring an ashless, acid-hardened cellulose medium made from refined pulp and pure cotton linters, these Grade DXS05 qualitative filter paper discs deliver the highest degree of fine particle retention in the GVS qualitative range. Each 42mm disc provides a 3um nominal particle retention with a very slow filtration speed, making it well suited for the most demanding clarification work. The hardened structure increases wet strength and chemical resistance for reliable handling during difficult filtrations.

Key Cellulose Filter Paper Characteristics

• Ashless and hardened: Acid-hardened construction reduces ash content and improves wet strength for critical analytical filtration.
• High alpha-cellulose content: Made from refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100%.
• Maximum fine-particle retention: Grade DXS05 provides the highest degree of fine particle filtration in the qualitative range at a 3um nominal retention.
• Very slow filtration speed: Optimized for extra fine-grained precipitates and difficult clarification conditions.
• Naturally hydrophilic: Wets readily with aqueous samples for consistent filtration.

Key Construction Characteristics

• Disc diameter: 42mm circles.
• Material: Hardened ashless cellulose filter paper.
• Classification: Qualitative.
• Pack: 100 discs per pack, nonsterile.

This grade maintains dependable retention of extra fine-grained precipitates such as barium sulphate and cupreous oxide, supporting sample integrity in gravimetric and clarification work. The very slow flow rate and hardened structure provide consistent performance under difficult filtration conditions where finer precipitates must be captured.

Diameter

42mm

Flow Speed

Very Slow

Grade

DXS05

Hardened (Yes/ No)

Yes

Material

Cellulose

Mesh Format

Circle

Pack Count

100

Pore Size (µm)

3

Qualitative/ Quantitative

Qualitative

Sterility

Nonsterile

Wettability

Hydrophilic

• Clarification of Cloudy Suspensions The very slow, high-retention DXS05 grade clarifies cloudy liquids and difficult suspensions effectively.
• Fine Precipitate Filtration Captures extra fine-grained precipitates such as barium sulphate and cupreous oxide.
• Water and Soil Analysis Suited to water and soil sample preparation requiring maximum fine particle retention.
• Wine Clarification Often specified for clarifying wine where fine clarity is required.
• Difficult Filtration Conditions Designed for the most demanding qualitative filtrations where finer particle capture is critical.
• Gravimetric Sample Prep The ashless hardened medium supports recovery of fine precipitates retained on the filter surface.