About this item
Whatman Grade 40 high-purity filters from Cytiva's business are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.
- High-purity filters contain 0.007% maximum ash content
- Medium nominal particle retention rating of 8 µm
- Medium filtration speed (Herzberg 340 s)
- Particularly useful for gravimetric analysis
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.
Cytiva's high-purity Whatman Grade 40 ashless paper is suited to:
- Soil analysis, when separating solid matter from aqueous extracts
- Quantitative determination of milk sediment
- Use as a clean-up filter for solutions prior to atomic absorption (AA) spectrometry
- Analysis of constituent components in cements, clays, iron, and steel products
- Collection of trace elements and radionuclides from the atmosphere
Specifications
- Catalog No:
- 28475-048
- 28475-026
- 28475-081
- 28475-060
- 28475-128
- 28475-106
- 28475-140
- 11008-520
- Thickness:
- 210 µm (nominal)
- 210 µm (nominal)
- 210 µm (nominal)
- 210 µm (nominal)
- 210 µm (nominal)
- 210 µm (nominal)
- 210 µm (nominal)
- 210 µm (nominal)
- Particle retention:
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- 8 µm (Particle retention rating at 98% efficiency), in liquid max.
- Filtration speed:
- 340 s (Herzberg)
- 340 s (Herzberg)
- 340 s (Herzberg)
- 340 s (Herzberg)
- 340 s (Herzberg)
- 340 s (Herzberg)
- 340 s (Herzberg)
- 340 s (Herzberg)
- Ash content:
- 0.007%
- 0.007%
- 0.007%
- 0.007%
- 0.007%
- 0.007%
- 0.007%
- 0.007%
- Airflow rate:
- 21 s/100 ml/in²
- 21 s/100 ml/in²
- 21 s/100 ml/in²
- 21 s/100 ml/in²
- 21 s/100 ml/in²
- 21 s/100 ml/in²
- 21 s/100 ml/in²
- 21 s/100 ml/in²
- Basis weight:
- 95 g/m²
- 95 g/m²
- 95 g/m²
- 95 g/m²
- 95 g/m²
- 95 g/m²
- 95 g/m²
- 95 g/m²
- Burst strength:
- 0.034 bar wet burst; 1.103 bar dry burst
- 0.034 bar wet burst; 1.103 bar dry burst
- 0.034 bar wet burst; 1.103 bar dry burst
- 0.034 bar wet burst; 1.103 bar dry burst
- 0.034 bar wet burst; 1.103 bar dry burst
- 0.034 bar wet burst; 1.103 bar dry burst
- 0.034 bar wet burst; 1.103 bar dry burst
- 0.034 bar wet burst; 1.103 bar dry burst
- Flow rate:
- Medium flow
- Medium flow
- Medium flow
- Medium flow
- Medium flow
- Medium flow
- Medium flow
- Medium flow
- Recommended flow rate:
- 25 ml/min (water)
- 25 ml/min (water)
- 25 ml/min (water)
- 25 ml/min (water)
- 25 ml/min (water)
- 25 ml/min (water)
- 25 ml/min (water)
- 25 ml/min (water)
- Tensile strength:
- 46.7 N/15 mm Tensile M/D Dry
- 46.7 N/15 mm Tensile M/D Dry
- 46.7 N/15 mm Tensile M/D Dry
- 46.7 N/15 mm Tensile M/D Dry
- 46.7 N/15 mm Tensile M/D Dry
- 46.7 N/15 mm Tensile M/D Dry
- 46.7 N/15 mm Tensile M/D Dry
- 46.7 N/15 mm Tensile M/D Dry
Specifications
Supplier: VWR International
Supplier: VWR International
Supplier: VWR International
Supplier: VWR International
Supplier: VWR International
Supplier: BDH