Grade 42 Ashless Filter Paper for Instrumental Analysis, 185mm Circle, 100/Pk SKU: 1442-185

Quantitative Ashless Filter Paper - 1442-185

Regulatory laboratories performing routine gravimetric assays need ashless paper with certificates of analysis documenting compliance with method specifications. Cellulose purity and documented ash specifications position ashless paper as the standard medium for ignition-based quantitative determinations. For this reason, rigorous quality control at every production stage ensures physical properties align with published grade specifications before distribution.

Key Filter Paper Characteristics

• Manufactured under controlled acid washing conditions, each sheet delivers consistent ash levels across production lots for method reproducibility.
• Acid-washed cellulose construction produces ash content below 0.01%, meeting the blank value requirements of quantitative gravimetric methods.
• Smooth surface finish facilitates complete precipitate recovery and clean separation from the paper during transfer operations.
• Ashless filter paper provides the documented low residue needed for ignition-based analytical procedures where filter mass affects results.
• Designed for gravimetric determinations where the filter paper is ashed or ignited as part of the analytical measurement step.

When your multi-site study requires comparable data across laboratories, papers manufactured to tight documented specifications ensure your results align. With this in mind, 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

185mm

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

• Silica Determination - Captures dehydrated silica for gravimetric analysis in cement, geological, and industrial raw material testing.
• Iron Determination - Collects iron hydroxide precipitate for gravimetric determination in ore assay and environmental analysis.
• Aluminum Analysis - Collects aluminum hydroxide precipitate for ignition and weighing in metallurgical and environmental methods.
• Chloride Gravimetry - Retains silver chloride precipitate for mass-based chloride determination in water quality and process control.
• 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.