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Thumbnail Filmstrip of Cellulose Quantitative Filter Paper, Ashless, Grade 40, Medium-Slow, 7-9um, 70mm, 100/Pk Images
Featuring a high-purity ashless cellulose medium engineered for quantitative analysis, this Grade 40 (DMS40) filter paper delivers a 7 to 9 micron particle retention with a medium-slow flow profile. Each 70mm circle measures 170 microns thick with a nominal basis weight of 85 g/m2 and an ash content below 0.007%, making it well suited to gravimetric work where residual ash would otherwise compromise weight measurements. Supplied 100 discs per pack.
Key Cellulose Media Characteristics
- Hydrophilic refined cellulose construction that wets readily with aqueous samples.
- Nominal particle retention of 7 to 9 microns for general-purpose quantitative separations.
- Medium-slow flow speed balancing throughput with retention of finer precipitates.
- Ashless purity with maximum ash content below 0.007% for reliable gravimetric and combustion analysis.
- Uniform 170 micron thickness and 85 g/m2 basis weight for consistent, reproducible results.
Key Construction Characteristics
- Format: 70mm diameter circles.
- Material: refined cellulose, ashless quantitative grade.
- Classification: quantitative, nonsterile.
- Packaging: 100 discs per pack.
This ashless quantitative paper maintains sample integrity by minimizing background contamination during critical analytical filtration. Its consistent retention and clean filtrate make it dependable for separating solid matter from aqueous extracts and preparing samples for instrumental analysis. The low ash content supports accurate results in applications sensitive to trace-level interference.
- Color
- White
- Diameter
- 70mm
- Flow Speed
- Medium-Slow
- Grade
- DMS40 (Grade 40)
- Material
- Cellulose
- 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)
- 7-9
- Qualitative/ Quantitative
- Quantitative
- Sartorius Equivalent
- Grade 3
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 40
- Gravimetric Analysis The under 0.007% ash content allows accurate weight measurements of combusted residues without significant background interference.
- Soil Sample Preparation Separates solid matter from aqueous extracts in general soil analysis with reliable 7 to 9 micron retention.
- Quantitative Precipitate Filtration Captures medium-fine precipitates from analytical solutions while delivering a clear filtrate.
- Instrumental Analysis Sample Prep Provides clean, low-contamination filtrate for downstream spectrophotometric and trace element methods.
- Industrial Material Testing Supports gravimetric determination of components in cements, clays, and iron and steel products.
- Buchner Funnel Filtration Compatible with Buchner funnels and filtration under vacuum or pressure for routine analytical work.