Hardened Slow-Speed Quantitative Filter Paper, Low Ash 0.02%, Pore 7–9 μm
Hardened quantitative filter paper, slow speed, max. 0.02% ash. Sits between ash-free quantitative (max. 0.002%) and low-ash qualitative (max. 0.06%) grades—suitable for quantitative work where absolute mineral residue is not critical. Recommended for fine precipitates: barium sulphate, lead sulphate, zinc sulphate, nickel sulphate, barium fluoride and barium hydroxide. Wet-strength reinforced. Pore 7–9 μm, thickness 290 μm, basis weight 80 g/m². Equiv. Whatman 50. Available as circles (100 units, shrink-wrapped) and folded.
In stock
SKU:
21427
As low as:
€12.26
As low as:
Hardened Slow-Speed Quantitative Filter Paper, Low Ash 0.02%
Hardened quantitative filter paper with 7–9 μm pore size and max. 0.02% ash content. An intermediate grade between ash-free quantitative paper (max. 0.002%) and low-ash qualitative paper (max. 0.06%)—suited to quantitative work that does not demand the absolute minimum mineral residue.
Recommended precipitates
Retains fine precipitates. Recommended for:
- Barium sulphate
- Lead sulphate
- Zinc sulphate
- Nickel sulphate
- Barium fluoride
- Barium hydroxide
Slow flow rate ensures effective retention of fine particles without compromising filtrate integrity.
Technical specifications
- Type: Hardened quantitative, slow speed
- Ash content: Max. 0.02%
- Pore size: 7–9 μm
- Thickness: 290 μm
- Basis weight: 80 g/m²
- Wet strength: High
- Equivalent to: Whatman 50
Available formats
- Circles: Packs of 100 units, shrink-wrapped in plastic
- Folded: In box
Typical applications
Used in chemical analysis, quality control and gravimetric laboratories. Handles fine-particle precipitates and wet manipulation. Compatible with Buchner funnels and moderate vacuum filtration.
| Brand | PRAT DUMAS |
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