Filter Paper Grade No. 4, Qualitative, Coarse Retention - 27

Filter Paper Grade No. 4, Qualitative, Coarse Retention - 24, Part number 1004-270-CY , Buy now from Whatman at Laboratory Disposable Products.

Whatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper. They are useful in qualitative analytical separations when fast flow is required and the collection of fine particles is not critical. These cellulose filters are used in qualitative analytical techniques to determine and identify materials (e.g., in air pollution monitoring).

Specifications
Application: Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
Grade: Grade 4
Grade Type: Standard
Material: Cellulose
Nominal Ash Content: 0.06
Nominal air flow rate: 4 s/100 ml/in
Nominal basis weight: 92 g/m
Nominal thickness: 210 m
Typical Particle Retention in Liquid: 25 m
Typical Trace Element Levels: Aluminum 3.6 g/g Antimony <0.5 g/g Arsenic <0.5 g/g Barium <0.5 g/g Boron <1 g/g Calcium 27.5 g/g Chromium 1 g/g Copper 0.9 g/g Iron 13.7 g/g Lead <0.5 g/g Magnesium 21 g/g Manganese <0.5 g/g Mercury <0.5 g/g Potassium 6.2 g/g Silicon 8.8 g/g Sodium 32.3 g/g Zinc 58.3 g/g
Typical water flow rate: 247 ml/min

Ash is determined by ignition of the cellulose filter at 900 DEG C in air.
Particle retention rating at 98 efficiency.
For 9 cm diameter
U.S. Sales Only

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