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Whatman™ Quantitative Filter Paper: Grade 42 Circles

Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Circles are suitable for processes that require ashing.

$40.13 - $648.79

Specifications

Format Circle
Grade 42
Pore Size (Metric) 2.5μm
Porosity Fine
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Products
Catalog Number Mfr. No. Diameter (Metric) Price Quantity    

09-855AA

 
whatman™
1442-055
55mm Pack of 100 Each for $47.04

09-855A

  Accessories
whatman™
1442-070
70mm Pack of 100 Each for $56.33

09-855B

  Accessories
whatman™
1442-090
90mm Pack of 100 Each for $75.17

09-855D

  Accessories
whatman™
1442-125
125mm Pack of 100 Each for $105.85

09-855E

  Accessories
whatman™
1442-150
150mm Pack of 100 Each for $134.10

09-856B

  Accessories
whatman™
1442-240
240mm Pack of 100 Each for $315.92

09-856A

  Accessories
whatman™
1442-042
425mm Pack of 100 Each for $40.13

09-855F

  Accessories
whatman™
1442-185
185mm Pack of 100 Each for $198.10

09-856D

  Accessories
whatman™
1442-320
320mm Pack of 100 Each for $648.79

09-855C

  Accessories
whatman™
1442-110
110mm Pack of 100 Each for $91.83
Description & Specifications

Specifications

Format Circle
Grade 42
Pore Size (Metric) 2.5μm
Porosity Fine

Ashless grades are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman™ quantitative filter papers are designed for gravimetric analysis and the preparation of samples for instrumental analysis.

  • Ashless: 0.007% ash maximum
  • Fine (2.5 µm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
  • Herzberg filtration speed of 1870 s
  • Commonly used as a calcium carbonate filter

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