Grade 40 Ashless Filter Paper for Pollution Analysis, 30mm Circle, 100/Pk SKU: 1440-329

Quantitative Ashless Filter Paper - 1440-329

Gravimetric procedures in regulated laboratories require documented ash content that can be reported alongside analytical results for compliance verification. 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

• Designed for gravimetric determinations where the filter paper is ashed or ignited as part of the analytical measurement step.
• Standard cellulose construction eliminates chemical treatment steps that could introduce background contamination in sensitive analytical methods.
• Ashless filter paper provides the documented low residue needed for ignition-based analytical procedures where filter mass affects results.
• Smooth surface finish facilitates complete precipitate recovery and clean separation from the paper during transfer operations.
• Particle retention rating of 8um defines the separation threshold for the application, determining which solids are captured and which pass through.

If your teaching or research laboratory processes high volumes of routine samples, the documented flow rates above translate directly to throughput. Documented ash specifications on every lot give you the traceability your regulated analytical methods and quality audits require. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

30mm

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

• Chloride Gravimetry - Retains silver chloride precipitate for mass-based chloride determination in water quality and process control.
• 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.
• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water testing.
• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.