Laboratory Filter Papers
Showing 25–39 of 39 results
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Whatman
Qualitative Filter Papers-Grade 5: 2.5μm
Grade 5: 2.5 μm*
The maximum degree of fine particle filtration in the qualitative range.Capable of retaining the fine precipitates encountered in chemical analysis.
Slow flow rate.
Excellent clarifying filter for cloudy suspensions and for water and soil analysis.
Also available prepleated as Grade 5V.
SKU: n/a -
Whatman
Qualitative Filter Papers-Grade 4: 20-25μm
Extremely fast filtering with excellent retention of coarse particles and gelatinous
precipitates such as ferric hydroxide and aluminum hydroxide.Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis.
Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
Available prepleated as Grade 4V.
SKU: n/a -
Whatman
Qualitative Filter Papers-Grade 3:6μm
Grade 3: 6 μm, (Medium flow, thick filter paper)
Double the thickness of Grade 1 with still finer particle retention and excellent loading capacity; more precipitate can be held without clogging.
The extra thickness gives increased wet strength and makes this grade highly suitable for use in Büchner funnels.
The high absorbency is particularly valuable when the paper is used as a sample carrier.
SKU: n/a -
Whatman
Qualitative Filter Papers – Grade 2: 8µm
Slightly more retentive than Grade 1 with a corresponding increase in filtration time (i.e., slightly slower filtration speed).
More absorbent than Grade 1. In addition to general filtration in the 8 μm particle size range, the extra absorbency is utilized, for example, to hold soil nutrient in plant growth trials.
Also used for monitoring specific contaminants in the atmosphere and in soil testing.
SKU: n/a -
Whatman
Qualitative Filter Papers – Grade 1: 11µm
Grade :Grade 1
Grade Type :Standard
Typical Particle Retention in Liquid1 :11 µm
Nominal Thickness :180 µm
Typical water flow rate2 :57 ml/min
Nominal Basis Weight :87 g/m²
Nominal Air Flow Rate :13 s/100 ml/in²
Nominal Ash Content :0.06%
Material :CelluloseFormat :Sheets
Dimensions :580 x 680 mm (22 x 26 in)
Pack size :100 piecesSKU: n/a