Grade 40 Ashless Filter Paper for Pollution Analysis, 150mm Circle 100/Pk SKU: 1440-150

Quantitative Ashless Filter Paper - 1440-150

Regulatory laboratories performing routine gravimetric assays need ashless paper with certificates of analysis documenting compliance with method specifications. Certificate of analysis provides lot-specific ash content values for incorporation into method blank calculations and quality records. From fiber selection through final inspection, the manufacturing process ensures every sheet meets the performance specifications of its grade.

Key Filter Paper Characteristics

• Rated at 8um particle retention, the fiber matrix provides a defined cutoff for consistent separation across analytical batches.
• Designed for gravimetric determinations where the filter paper is ashed or ignited as part of the analytical measurement step.
• 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.
• Tightly controlled manufacturing produces documented ash content that remains consistent across production lots for method reproducibility.

When your application makes the filter paper part of the measurement, the ash and weight specifications above define its analytical contribution. Fine fiber construction provides the mechanical integrity you need to transfer collected precipitates to the crucible without sample loss. 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

150mm

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

• Phosphate Gravimetry - Collects magnesium ammonium phosphate precipitate for ignition to pyrophosphate in soil and fertilizer analysis.
• 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.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.
• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water testing.
• Silica Determination - Captures dehydrated silica for gravimetric analysis in cement, geological, and industrial raw material testing.