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Whatman™ Qualitative Filter Paper: Grade 4 Circles

Filters and retains course particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

$16.88 - $397.15

Specifications

Grade 4
Pore Size (Metric) 20 to 25μm
Particle Retention Coarse particles and gelatinous precipitates
Format Circle
Material Cellulose
View More Specs


Products ${productFamilyLength}
Catalog Number Mfr. No. Diameter (Metric) Price Quantity  
Catalog Number Mfr. No. Diameter (Metric) Price Quantity  
09-825B Accessories Whatman™
1004090
90mm Pack of 100 Each for $26.65
09-825A Accessories Whatman™
1004070
70mm Pack of 100 Each for $21.71
09-825C Accessories Whatman™
1004110
110mm Pack of 100 Each for $33.71
09-825D Accessories Whatman™
1004125
125mm Pack of 100 Each for $43.46
09-825E Whatman™
1004150
150mm Pack of 100 Each for $55.29
09-825F Accessories Whatman™
1004185
185mm Pack of 100 Each for $82.00
09-825L Whatman™
1004270
270mm Pack of 100 Each for $183.19
09-825G Accessories Whatman™
1004240
240mm Pack of 100 Each for $139.75
09-825J Accessories Whatman™
1004042
42.5mm Pack of 100 Each for $16.88
09-825K Accessories Whatman™
1004055
55mm Pack of 100 Each for $21.71
09-825H Accessories Whatman™
1004320
320mm Pack of 100 Each for $263.17
09-825M Accessories Whatman™
1004400
400mm Pack of 100 Each for $397.15
Specifications

Description

 

These cellulose filters are used in qualitative analytical techniques to determine and identify materials and for clarifying liquids. 
  • Particle Retention: 25μm
  • Porosity: Coarse
  • Filtration speed: Herzberg, 37 sec.
  • Surface: smooth
  • Extremely fast filtering  with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide
  • Useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis
Description & Specifications

Specifications

4
Coarse particles and gelatinous precipitates
Cellulose
20 to 25μm
Circle