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Quantitative/Hardened Ashless Filter Papers
SKU# N0712.5CM
- Nominal Retention (µm) 4
- Diameter (cm) 12.5
- Thickness (mm) 0.18
- Flow Time (sec) 200
- Unit Quantity 100
Made of 100% cotton linter cellulose, Ash Content: 0.01%(Except No.4A 0.025%), Acid washed: Double acid washed in hydrochloric then hydrofluoric acid (No. 3, 5A, 5B, 5C, 6, 7), then rinsed with ultrapure water to neutralize. No. 4A is further treated with nitric acid before washing.
