Grade 40 Ashless Filter Paper for Pollution Analysis, 240mm Circle, 100/Pk SKU: 1440-240

Quantitative Ashless Filter Paper - 1440-240

Trace-level determinations by ignition depend on filter paper with ash content low enough to fall within method-acceptable blank ranges. Acid washing removes metallic ions that could interfere with trace element determinations following ignition of the loaded filter. In sum, rigorous quality control at every production stage ensures physical properties align with published grade specifications before distribution.

Key Filter Paper Characteristics

• Acid-washed cellulose construction produces ash content below 0.01%, meeting the blank value requirements of quantitative gravimetric methods.
• Designed for gravimetric determinations where the filter paper is ashed or ignited as part of the analytical measurement step.
• Manufactured under controlled acid washing conditions, each sheet delivers consistent ash levels across production lots for method reproducibility.
• Standard cellulose construction eliminates chemical treatment steps that could introduce background contamination in sensitive analytical methods.
• Non-strengthened paper is appropriate for routine gravity filtration where prolonged vacuum exposure is not part of the workflow.

When your analytical procedure specifies a particular grade, the retention and purity characteristics documented above confirm method compliance. Ashless certification supports the regulatory compliance documentation your environmental and pharmaceutical methods demand. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

240mm

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

• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.
• Chloride Gravimetry - Retains silver chloride precipitate for mass-based chloride determination in water quality and process control.
• 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.
• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Nickel Determination - Retains nickel dimethylglyoxime precipitate for ignition-based quantification in alloy and plating bath testing.