Grade 44 Ashless Thin Filter Paper, 150mm Circle, 100/Pk SKU: 1444-150

Quantitative Ashless Filter Paper - 1444-150

Gravimetric analysis demands filter paper that contributes virtually no residue after ignition, ensuring mass measurements reflect the sample alone. Controlled washing process removes metallic and mineral contaminants that would otherwise contribute measurable mass after ignition. Rigorous quality control at every production stage ensures physical properties align with published grade specifications before distribution.

Key Filter Paper Characteristics

• Standard cellulose construction provides reliable performance for gravity filtration and light vacuum applications.
• Controlled fiber density balances rapid filtration with complete precipitate capture for efficient quantitative determinations.
• Controlled ash level of <0.007% meets the blank value requirements of quantitative methods where filter contribution must be documented.
• 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.

Whether your method requires simple clarification or precise gravimetric determination, the documented specifications above define what this paper delivers. Ashless certification supports the regulatory compliance documentation your environmental and pharmaceutical methods demand. Elevate the quality of your analytical data today by standardizing on a filtration product built to meet the exact specifications of your applications.

Diameter

150mm

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

• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water 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.
• Nickel Determination - Retains nickel dimethylglyoxime precipitate for ignition-based quantification in alloy and plating bath testing.
• Total Ash Testing - Provides the ultra-low blank needed for accurate ash determination in food, pharmaceutical, and material samples.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.