Grade 42 Ashless Filter Paper for Instrumental Analysis, 90mm Circle, 100/Pk SKU: 1442-090

Quantitative Ashless Filter Paper - 1442-090

Classical analytical methods requiring filter ignition with collected precipitate demand documented ash values verifiable through every production lot. Acid-washed cellulose construction reduces inorganic residue to levels below 0.01%, meeting the blank requirements of gravimetric analytical methods. Together, controlled manufacturing delivers the documented retention, flow rate, and physical consistency that analytical and preparative filtration methods require.

Key Filter Paper Characteristics

• Controlled ash level of <0.007% meets the blank value requirements of quantitative methods where filter contribution must be documented.
• Pure cellulose fiber matrix combines low inorganic residue with the mechanical integrity needed for careful precipitate transfer.
• Standard cellulose construction eliminates chemical treatment steps that could introduce background contamination in sensitive analytical methods.
• Particle retention rating of 2.5um defines the separation threshold for the application, determining which solids are captured and which pass through.
• Ashless filter paper provides the documented low residue needed for ignition-based analytical procedures where filter mass affects results.

When your quality system requires documented specifications for every consumable, the grade data above provides the traceability your auditors expect. Premium cellulose purity reduces the blank correction calculations your gravimetric procedures would otherwise require. 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

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

• Nickel Determination - Retains nickel dimethylglyoxime precipitate for ignition-based quantification in alloy and plating bath testing.
• Sulfate Gravimetry - Retains barium sulfate precipitate for ignition-based sulfate quantification in water and industrial samples.
• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.
• Total Ash Testing - Provides the ultra-low blank needed for accurate ash determination in food, pharmaceutical, and material samples.
• Silica Determination - Captures dehydrated silica for gravimetric analysis in cement, geological, and industrial raw material testing.