Grade 41 Quadrant Folded Filter Paper, 150mm Circle, 500 Pk SKU: 10380206

Quantitative Ashless Filter Paper - 10380206

Gravimetric procedures in regulated laboratories require documented ash content that can be reported alongside analytical results for compliance verification. Controlled fiber density balances rapid filtration rates with complete precipitate capture for efficient quantitative determinations. From fiber selection through final inspection, the manufacturing process ensures every sheet meets the performance specifications of its grade.

Key Filter Paper Characteristics

• Acid-washed cellulose construction produces ash content below 0.01%, meeting the blank value requirements of quantitative gravimetric methods.
• Manufactured under controlled acid washing conditions, each sheet delivers consistent ash levels across production lots for method reproducibility.
• Certificate of analysis documents actual ash content per production lot, providing traceability for regulated analytical methods.
• Controlled fiber density balances rapid filtration with complete precipitate capture for efficient quantitative determinations.
• Acid washing process removes metallic contaminants that could interfere with trace element determinations after ignition.

When your budget requires balancing performance with cost efficiency, the documented consistency above ensures you're not paying for premium features you don't need. In this context, consistent lot-to-lot ash values mean your validated gravimetric method stays valid without recalibrating blank corrections between purchases. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

Diameter

150mm

Flow Speed

Fast

Folded/ Fluted/ Pleated

Yes

Grade

41

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

<0.007%

Nominal Basis Weight (g/ m²)

85g/m²

Pack Count

500

Particle Retention

20um

Pore Size (µm)

20

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

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