Grade 44 Ashless Thin Filter Paper, 90mm Circle, 100/Pk SKU: 1444-090

Quantitative Ashless Filter Paper - 1444-090

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. Rigorous quality control at every production stage ensures physical properties align with published grade specifications before distribution.

Key Filter Paper Characteristics

• Nominal basis weight of 80g/m² reflects the fiber density that determines flow rate, retention, and mechanical handling characteristics.
• Acid-washed cellulose construction produces ash content below 0.01%, meeting the blank value requirements of quantitative gravimetric methods.
• At 3um rated retention, the fiber matrix captures particles above the threshold while allowing smaller materials to pass through.
• Designed for gravimetric determinations where the filter paper is ashed or ignited as part of the analytical measurement step.
• Pure cellulose fiber matrix combines low inorganic residue with the mechanical integrity needed for careful precipitate transfer.

If your laboratory runs standardized filtration protocols, the lot-level consistency of this filter paper protects your method reproducibility. Here, fine fiber construction provides the mechanical integrity you need to transfer collected precipitates to the crucible without sample loss. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

90mm

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

Pack Count

100

Particle Retention

3um

Pore Size (µm)

3

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.
• 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.
• Calcium Oxalate Analysis - Captures calcium precipitate for ignition to calcium oxide, supporting clinical and water hardness testing.
• Chloride Gravimetry - Retains silver chloride precipitate for mass-based chloride determination in water quality and process control.
• Sulfate Gravimetry - Retains barium sulfate precipitate for ignition-based sulfate quantification in water and industrial samples.