GR 42 2.54x9cm 100/Pk SKU: 1442-6551

Quantitative Ashless Filter Paper - 1442-6551

Sulfate determination by precipitation requires filter paper whose ash content remains below the method's blank specification after ignition. Certificate of analysis provides lot-specific ash content values for incorporation into method blank calculations and quality records. Ultimately, each sheet reflects production standards where fiber density, thickness, and retention characteristics are verified before lot release.

Key Filter Paper Characteristics

• Standard wet strength is sufficient for conventional Buchner funnel and gravity filtration setups at moderate sample volumes.
• Pure cellulose fiber matrix combines low inorganic residue with the mechanical integrity needed for careful precipitate transfer.
• Basis weight of 100g/m² indicates the fiber mass per unit area that controls retention, flow rate, and wet strength.
• Tightly controlled manufacturing produces documented ash content that remains consistent across production lots for method reproducibility.
• Nominal retention of 2.5um provides the particle size cutoff appropriate for the analytical or preparative separation method.

When your analytical procedure specifies a particular grade, the retention and purity characteristics documented above confirm method compliance. With these demands in mind, 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.

Dimensions

25.4 x 90mm

Flow Speed

Slow

Folded/ Fluted/ Pleated

No

Grade

42

Hardened (Yes/ No)

No

Material

Cellulose Fiber

Nominal Ash Content (%)

<0.007%

Nominal Basis Weight (g/ m²)

100g/m²

Pack Count

100

Particle Retention

2.5um

Pore Size (µm)

2.5

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

No

Wettability

Hydrophilic

• Gravimetric Determination - Collects and ignites precipitates for accurate mass measurement with negligible filter blank contribution.
• 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.
• Nickel Determination - Retains nickel dimethylglyoxime precipitate for ignition-based quantification in alloy and plating bath testing.
• Zinc Analysis - Collects zinc ammonium phosphate precipitate for ignition-based quantification in metallurgical and water testing.
• Lead Quantification - Captures lead sulfate precipitate for gravimetric determination in environmental and industrial samples.