Grade 44 Ashless Thin Filter Paper, 240mm Circle, 100/Pk SKU: 1444-240

Quantitative Ashless Filter Paper - 1444-240

Gravimetric analysis demands filter paper that contributes virtually no residue after ignition, ensuring mass measurements reflect the sample alone. Each production lot is tested for ash content and documented with a certificate to support analytical traceability requirements. Taken together, controlled manufacturing delivers the documented retention, flow rate, and physical consistency that analytical and preparative filtration methods require.

Key Filter Paper Characteristics

• Smooth surface finish facilitates complete precipitate recovery and clean separation from the paper during transfer operations.
• Standard construction provides the soft, conformable surface that seats properly in gravity filtration funnels without edge leakage.
• Standard construction provides the absorption and wicking characteristics that gravity-based filtration protocols require.
• Pure cellulose fiber matrix combines low inorganic residue with the mechanical integrity needed for careful precipitate transfer.
• At 80g/m² nominal basis weight, the paper provides the mass uniformity needed for reproducible gravimetric determinations.

Scaling your method from development to routine production requires paper consistency at every lot, and the specifications above provide that assurance. Acid-washed cellulose removes the inorganic contaminants that would otherwise introduce blank errors in your ignition-based quantitative determinations. Take control of your sample preparation variables and ensure that your data reflects the true nature of your work, rather than the quality of your consumables.

Diameter

240mm

Flow Speed

Slow

Folded/ Fluted/ Pleated

No

Grade

44

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

<0.007%

Nominal Basis Weight (g/ m²)

80g/m²

Particle Retention

3um

Pore Size (µm)

3

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Nickel Determination - Retains nickel dimethylglyoxime precipitate for ignition-based quantification in alloy and plating bath testing.
• Gravimetric Determination - Collects and ignites precipitates for accurate mass measurement with negligible filter blank contribution.
• Phosphate Gravimetry - Collects magnesium ammonium phosphate precipitate for ignition to pyrophosphate in soil and fertilizer analysis.
• Calcium Oxalate Analysis - Captures calcium precipitate for ignition to calcium oxide, supporting clinical and water hardness testing.
• Silica Determination - Captures dehydrated silica for gravimetric analysis in cement, geological, and industrial raw material testing.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.