Grade 42 Ashless Filter Paper for Instrumental Analysis, 125mm Circle, 100/Pk SKU: 1442-125

Quantitative Ashless Filter Paper - 1442-125

Gravimetric analysis demands filter paper that contributes virtually no residue after ignition, ensuring mass measurements reflect the sample alone. Fine fiber matrix delivers the mechanical integrity needed to transfer collected precipitates from funnel to crucible without loss. Consistent physical properties across the full sheet area support uniform filtration results in both gravity and vacuum applications.

Key Filter Paper Characteristics

• Ashless filter paper provides the documented low residue needed for ignition-based analytical procedures where filter mass affects results.
• Certificate of analysis documents actual ash content per production lot, providing traceability for regulated analytical methods.
• Particle retention rating of 2.5um defines the separation threshold for the application, determining which solids are captured and which pass through.
• 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.

When your quality system requires documented specifications for every consumable, the grade data above provides the traceability your auditors expect. To that end, uniform fiber density across the sheet area ensures your precipitate capture remains consistent from center to edge. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

125mm

Flow Speed

Slow

Folded/ Fluted/ Pleated

No

Grade

42

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

<0.007%

Nominal Basis Weight (g/ m²)

100g/m²

Pack Count

100

Particle Retention

2.5um

Pore Size (µm)

2.5

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Total Ash Testing - Provides the ultra-low blank needed for accurate ash determination in food, pharmaceutical, and material samples.
• Silica Determination - Captures dehydrated silica for gravimetric analysis in cement, geological, and industrial raw material testing.
• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water testing.
• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.
• Sulfate Gravimetry - Retains barium sulfate precipitate for ignition-based sulfate quantification in water and industrial samples.
• Calcium Oxalate Analysis - Captures calcium precipitate for ignition to calcium oxide, supporting clinical and water hardness testing.