Grade 41 Fast Ashless Filter Paper, 125mm Circle 100/Pk SKU: 1441-125

Quantitative Ashless Filter Paper - 1441-125

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. Certificate of conformance documentation accompanies each lot, providing traceability for quality systems and regulatory audit requirements.

Key Filter Paper Characteristics

• Tightly controlled manufacturing produces documented ash content that remains consistent across production lots for method reproducibility.
• Acid washing process removes metallic contaminants that could interfere with trace element determinations after ignition.
• Nominal retention of 20um provides the particle size cutoff appropriate for the analytical or preparative separation method.
• Controlled ash level at <0.007% ensures inorganic residue after ignition remains within the acceptable range for gravimetric procedures.
• Ashless filter paper provides the documented low residue needed for ignition-based analytical procedures where filter mass affects results.

If your laboratory supports multiple research groups with varying filtration needs, this paper's broad applicability simplifies your procurement process. 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

125mm

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

• Sulfate Gravimetry - Retains barium sulfate precipitate for ignition-based sulfate quantification in water and industrial samples.
• Gravimetric Determination - Collects and ignites precipitates for accurate mass measurement with negligible filter blank contribution.
• Silica Determination - Captures dehydrated silica for gravimetric analysis in cement, geological, and industrial raw material testing.
• Total Ash Testing - Provides the ultra-low blank needed for accurate ash determination in food, pharmaceutical, and material samples.
• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Chloride Gravimetry - Retains silver chloride precipitate for mass-based chloride determination in water quality and process control.