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Thumbnail Filmstrip of Cellulose Quantitative Filter Paper, Grade 42, 2-3um, 110mm, Ashless, Nonsterile, 100/Pk Images
Featuring an ashless quantitative cellulose medium, this 110mm filter paper disc delivers the finest particle retention in the quantitative range, capturing fine precipitates in the 2 to 3 micron range. With a very slow filtration speed and a nominal thickness of 160 microns, it traps particulate within the depth of the cellulose fiber matrix to support accurate gravimetric work. The naturally hydrophilic surface wets readily with aqueous samples, and the low residual ash makes the paper suitable for procedures that require ignition or ashing.
Key Cellulose Media Characteristics
- Ashless quantitative grade: very low residual ash supports gravimetric determinations where filter mass affects the result.
- Fine retention: retains particles in the 2 to 3 micron nominal range, the finest of the quantitative grades.
- Very slow filtration: dense fiber structure maximizes capture of ultrafine and colloidal precipitates.
- Naturally hydrophilic: the cellulose surface wets readily with aqueous samples for consistent flow.
- Depth retention: particulate is entrapped within the random cellulose fiber matrix throughout the media depth.
Key Construction Characteristics
- Material: high-purity cellulose, ashless quantitative grade.
- Format: 110mm diameter circle disc.
- Nominal thickness: 160 microns.
- Wet bursting strength: 52 kPa.
- Packaging: nonsterile, 100 discs per box.
This grade provides the documented purity and fine retention needed for critical analytical filtration, helping preserve sample integrity through to weighing or ashing. Consistent fiber density across the disc supports reproducible precipitate capture from one lot to the next, giving reliable performance in demanding gravimetric and instrumental sample preparation workflows.
- Color
- White
- Diameter
- 110mm
- Flow Speed
- Very Slow
- Grade
- Quantitative (DXS42)
- Material
- Cellulose
- Membrane Thickness (µm)
- 160
- Mesh Format
- Circle
- Nominal Basis Weight (g/ m²)
- 80
- Nominal Thickness (µm)
- 160
- Pack Count
- 100
- Particle Retention
- 2-3 µm
- Pore Size (µm)
- 2-3
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 42
- Gravimetric Analysis Captures fine and colloidal precipitates such as barium sulfate and metastannic acid for accurate weight determination.
- Ashing Procedures Low ash content supports ignition-based methods where residual filter mass would affect the measured result.
- Instrumental Sample Preparation Removes fine particulates ahead of ICP, ICP-MS, and AAS analysis to protect sensitive instrumentation.
- Cement and Calcium Carbonate Testing Retains calcium carbonate precipitate for gravimetric analysis in cement and industrial raw material work.
- Environmental Analysis Separates fine solid matter from aqueous extracts in soil and water sample preparation.
- Fine Precipitate Clarification Clarifies samples containing difficult, slow-settling particulate where maximum retention is required.