Grade 40 Ashless Filter Paper for Pollution Analysis, 450mm Circle, 100/Pk SKU: 1440-6168

Quantitative Ashless Filter Paper - 1440-6168

Methods specifying filter ignition with collected precipitate demand ash contributions that remain negligible and predictable across production lots. Acid washing removes metallic ions that could interfere with trace element determinations following ignition of the loaded filter. Controlled manufacturing delivers the documented retention, flow rate, and physical consistency that analytical and preparative filtration methods require.

Key Filter Paper Characteristics

• Pure cellulose fiber construction without hardening treatment ensures minimal chemical background in filtered samples.
• Tightly controlled manufacturing produces documented ash content that remains consistent across production lots for method reproducibility.
• Smooth surface finish facilitates complete precipitate recovery and clean separation from the paper during transfer operations.
• Rated at 8um particle retention, the fiber matrix provides a defined cutoff for consistent separation across analytical batches.
• Acid-washed cellulose construction produces ash content below 0.01%, meeting the blank value requirements of quantitative gravimetric methods.

If your laboratory runs standardized filtration protocols, the lot-level consistency of this filter paper protects your method reproducibility. To meet this need, 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

450mm

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

• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Calcium Oxalate Analysis - Captures calcium precipitate for ignition to calcium oxide, supporting clinical and water hardness testing.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.
• Gravimetric Determination - Collects and ignites precipitates for accurate mass measurement with negligible filter blank contribution.
• Silica Determination - Captures dehydrated silica for gravimetric analysis in cement, geological, and industrial raw material testing.
• Total Ash Testing - Provides the ultra-low blank needed for accurate ash determination in food, pharmaceutical, and material samples.