Grade 42 Ashless Filter Paper for Instrumental Analysis, 42.5mm Circle, 100/Pk SKU: 1442-042

Quantitative Ashless Filter Paper - 1442-042

Classical analytical methods requiring filter ignition with collected precipitate demand documented ash values verifiable through every production lot. Controlled fiber density balances rapid filtration rates with complete precipitate capture for efficient quantitative determinations. By design, from fiber selection through final inspection, the manufacturing process ensures every sheet meets the performance specifications of its grade.

Key Filter Paper Characteristics

• Acid washing process removes metallic contaminants that could interfere with trace element determinations after ignition.
• Controlled fiber density balances rapid filtration with complete precipitate capture for efficient quantitative determinations.
• Designed for gravimetric determinations where the filter paper is ashed or ignited as part of the analytical measurement step.
• At 100g/m² nominal basis weight, the paper provides the mass uniformity needed for reproducible gravimetric determinations.
• Standard construction delivers adequate wet strength for conventional filtration while maintaining economical cost for routine applications.

If your laboratory runs standardized filtration protocols, the lot-level consistency of this filter paper protects your method reproducibility. Specifically, ashless certification supports the regulatory compliance documentation your environmental and pharmaceutical methods demand. 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

42.5mm

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

• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.
• 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.
• Chloride Gravimetry - Retains silver chloride precipitate for mass-based chloride determination in water quality and process control.
• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water testing.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.