Whatman™ Quantitative Filter Papers, Ashless Grades (Ash 0.007%), Grade 40 | Quantitative Filter Paper

Whatman™ Quantitative Filter Papers, Ashless Grades (Ash 0.007%), Grade 40

Supplier: Cytiva

Whatman™ Quantitative Filter Papers, Ashless Grades (Ash 0.007%), Grade 40

Supplier: Cytiva

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:
CA11008-520
CA28475-140
CA28475-128
CA70240-042
CA28475-106
CA28475-081
CA28475-060
CA10147-982
CA28475-048
CA80080-586
CA28475-026
CA28475-015
CA28475-004
CA89203-510
CA11013-630
CA11013-350
CA76292-862
CA76292-858
CA76292-860

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)
210 µm (nominal)
210 µm (nominal)
210 µm (nominal)
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.
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.
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)
340 s (Herzberg)
340 s (Herzberg)
340 s (Herzberg)
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%
0.007%
0.007%
0.007%
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
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
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
95 g/m²
95 g/m²
95 g/m²
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
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
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
Medium flow
Medium flow
Medium flow
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)
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
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
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

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