Grade 40 Ashless Filter Paper for Pollution Analysis, 320mm Circle, 100/Pk SKU: 1440-320

Quantitative Ashless Filter Paper - 1440-320

Trace-level determinations by ignition depend on filter paper with ash content low enough to fall within method-acceptable blank ranges. Controlled fiber density balances rapid filtration rates with complete precipitate capture for efficient quantitative determinations. By design, rigorous quality control at every production stage ensures physical properties align with published grade specifications before distribution.

Key Filter Paper Characteristics

• Controlled fiber density balances rapid filtration with complete precipitate capture for efficient quantitative determinations.
• Tightly controlled manufacturing produces documented ash content that remains consistent across production lots for method reproducibility.
• Acid-washed cellulose construction produces ash content below 0.01%, meeting the blank value requirements of quantitative gravimetric methods.
• Pure cellulose fiber matrix combines low inorganic residue with the mechanical integrity needed for careful precipitate transfer.
• Nominal ash content of <0.007% ensures minimal inorganic residue after ignition, protecting the accuracy of gravimetric determinations.

If your laboratory runs standardized filtration protocols, the lot-level consistency of this filter paper protects your method reproducibility. Fine fiber construction provides the mechanical integrity you need to transfer collected precipitates to the crucible without sample loss. Secure your research outcomes by partnering with a filtration solution that understands your need for speed, accuracy, and reproducibility.

Diameter

320mm

Flow Speed

Medium

Folded/ Fluted/ Pleated

No

Grade

40

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

<0.007%

Nominal Basis Weight (g/ m²)

95g/m²

Pack Count

100

Particle Retention

8um

Pore Size (µm)

8

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

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