Grade 44 Ashless Thin Filter Paper, 110mm Circle, 100/Pk SKU: 1444-110

Quantitative Ashless Filter Paper - 1444-110

Methods specifying filter ignition with collected precipitate demand ash contributions that remain negligible and predictable across production lots. Each production lot is tested for ash content and documented with a certificate to support analytical traceability requirements. With this in mind, rigorous quality control at every production stage ensures physical properties align with published grade specifications before distribution.

Key Filter Paper Characteristics

• Pure cellulose fiber matrix combines low inorganic residue with the mechanical integrity needed for careful precipitate transfer.
• Tightly controlled manufacturing produces documented ash content that remains consistent across production lots for method reproducibility.
• Manufactured under controlled acid washing conditions, each sheet delivers consistent ash levels across production lots for method reproducibility.
• Controlled ash level of <0.007% meets the blank value requirements of quantitative methods where filter contribution must be documented.
• Acid washing process removes metallic contaminants that could interfere with trace element determinations after ignition.

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

110mm

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

• Sulfate Gravimetry - Retains barium sulfate precipitate for ignition-based sulfate quantification in water and industrial samples.
• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water testing.
• Nickel Determination - Retains nickel dimethylglyoxime precipitate for ignition-based quantification in alloy and plating bath testing.
• Chloride Gravimetry - Retains silver chloride precipitate for mass-based chloride determination in water quality and process control.
• Phosphate Gravimetry - Collects magnesium ammonium phosphate precipitate for ignition to pyrophosphate in soil and fertilizer analysis.
• Gravimetric Determination - Collects and ignites precipitates for accurate mass measurement with negligible filter blank contribution.