OMICRON® Quantitative(Ashless) Filter Paper - 400R - 8µm
Ashless, high purity cellulose papers specially crafted for critical gravimetric and instrumental analysis procedures. These filters are produced from carefully selected cotton linters containing > 98% alpha-cellulose. Double acid-washing followed by ultra-pure water rinsing ensures ash content is consistently ≤0.007%, minimizing contamination and ensuring precise analytical results.
Key Features
- Ashless Design: Ash content ≤0.007% to prevent interference in sensitive analysis
- High-Purity Cellulose: Made from refined cotton linters and α-cellulose
- Chemically Neutral: Acid-washed and ultra-pure water rinsed for maximum purity
- Trace Metal Safe: Free from mineral and metallic impurities
- Consistent Performance: Strict quality control ensures reliable and uniform results
Technical Specifications
- Type: Ashless Quantitative Filter
- Particle Retention(µm): 8µm
- Initial Filtration Speed (Sec/100ml): 335
- Ash Content: <0.007%
- Thickness: ~0.21 mm
- Weight(g/m²): 92-94 g/m²
- Heavy Metals: Below Detection Limit
- Application: Gravimetric analysis, metals & oxides
Applications
- Gravimetric analysis where residue must be weighed accurately after ignition
- General quantitative chemical analysis in analytical and research laboratories
- Separation and collection of fine to medium crystalline precipitates
- Food, pharmaceutical, and environmental testing requiring minimal inorganic contamination
- Sample preparation for elemental analysis and trace metal determination
- Quality control laboratories for routine quantitative filtration
- Academic and industrial research involving combustion or ashing of residue
(Omicron Scientific's brand alternative to Whatman's 1440-125)