QUANTITATIVE ASHLESS FILTER PAPER #5A
Diameter: 70 mm
Grade: No. 5A
Weight (g/m²): 97
Thickness (mm): 0.22
Flow Time1 (sec): 60
Absorption Speed2 (cm): 9.5
Wet Strength3 (cm H2O): 14.3
Retention Characteristic (µm): 7 Coarse and Gelatinous
Collection Efficiency (%, 0.3 µm DOP): 75
- Highest Quality Alpha Cotton Cellulose
- Ash Content: 0.1%
- Acid Washed: Double acid washed in hydrochloric acid, then hydrofluoric acid, then rinsed with ultrapure water to neutralize
Comments: Fast flow rate, retains coarse particulates and gelatinous precipitates (<10 µm). Filter hydroxides and metallic aerosols, environmental monitoring, determine silica content in steel.
- Flow time is the time in seconds required to filter 100 mL of distilled water at 20°C under pressure supplied by a 10 cm water column through a 10 cm2 section of filter paper.
- Absorption speed is the distance in cm that water will travel in an upright strip of filter paper in ten (10) minutes at 20°C.
- Wet strength is the height in cm of a water column that will rupture a 10 cm2 section of filter paper.