Quantitative Ashless Filter Paper (Whatman Grade 40 - JTP Grade 352)
£13.01 vat excl.
£15.61 vat Inc.
Grade 352 high purity filters from Johnson Test Papers are general-purpose papers for quantitative analysis. This grade has medium flow rate and good particle retention and is the most commonly used acid-washed filter. High-purity filters support accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis where ash content might affect weight measurements of combusted samples.
Specifications:
- Sizes: 55 to 320 mm
- Whatman Cross Reference = No.40
- Speed class: Medium
- Filtering Thickness (mm) 0.15
- Pore size (μM) 3-5
- Weight (g/m²) 84
- Filtration Speed (sec*) 100
- Burst Strength (Kg/cm²) > 0.20
Qualitative analysis
- Low ash content 0.07% (Acid wash treated)
- High wet strength
- Consistent performance Hardened grades available
- Custom cut
- Bulk packaging
- Made of 100% cotton linters
- Supplied in rolls, sheers, discs and folded filters