Grade 41 Fast Ashless Filter Paper, 320mm Circle 100/Pk SKU: 1441-320

Quantitative Ashless Filter Paper - 1441-320

Analytical laboratories performing routine gravimetric work need filter paper with consistent, documented ash values across every production lot. Controlled fiber density balances rapid filtration rates with complete precipitate capture for efficient quantitative determinations. Rigorous quality control at every production stage ensures physical properties align with published grade specifications before distribution.

Key Filter Paper Characteristics

• Smooth surface finish facilitates complete precipitate recovery and clean separation from the paper during transfer operations.
• Pure cellulose fiber matrix combines low inorganic residue with the mechanical integrity needed for careful precipitate transfer.
• Acid-washed cellulose construction produces ash content below 0.01%, meeting the blank value requirements of quantitative gravimetric methods.
• Non-hardened paper balances effective particle retention with economical unit cost for high-volume routine laboratory use.
• Ashless filter paper provides the documented low residue needed for ignition-based analytical procedures where filter mass affects results.

If you're transitioning from qualitative screening to quantitative gravimetric work, the documented ash content above confirms this paper's suitability. For exactly this reason, ultra-low ash content ensures your gravimetric results reflect captured material, not residue from the filter paper itself. 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

320mm

Flow Speed

Fast

Folded/ Fluted/ Pleated

No

Grade

41

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

<0.007%

Nominal Basis Weight (g/ m²)

85g/m²

Pack Count

100

Particle Retention

20um

Pore Size (µm)

20.0-25.0

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Calcium Oxalate Analysis - Captures calcium precipitate for ignition to calcium oxide, supporting clinical and water hardness testing.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.
• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water testing.
• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Gravimetric Determination - Collects and ignites precipitates for accurate mass measurement with negligible filter blank contribution.
• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.