Grade 41 Fast Ashless Filter Paper, 55mm Circle 100/Pk SKU: 1441-055

Quantitative Ashless Filter Paper - 1441-055

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. Working in concert, quality-controlled production produces filter paper with the documented consistency that reproducible analytical and preparative methods demand.

Key Filter Paper Characteristics

• Designed for gravimetric determinations where the filter paper is ashed or ignited as part of the analytical measurement step.
• Smooth surface finish facilitates complete precipitate recovery and clean separation from the paper during transfer operations.
• Controlled fiber density balances rapid filtration with complete precipitate capture for efficient quantitative determinations.
• Basis weight of 85g/m² indicates the fiber mass per unit area that controls retention, flow rate, and wet strength.
• Certificate of analysis documents actual ash content per production lot, providing traceability for regulated analytical methods.

When your quality system requires documented specifications for every consumable, the grade data above provides the traceability your auditors expect. In particular, ashless purity positions this paper as your standard medium for any method where the filter becomes part of the final measurement. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

55mm

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.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.
• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.
• Nickel Determination - Retains nickel dimethylglyoxime precipitate for ignition-based quantification in alloy and plating bath testing.
• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Total Ash Testing - Provides the ultra-low blank needed for accurate ash determination in food, pharmaceutical, and material samples.