GE HEALTHCARE BIOSCIENCES

Whatman™ Quantitative Filter Paper: Grade 41 Circles

Use for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates or for quantitative air pollution analysis. Whatman™ Quantitative Filter Paper: Grade 41 Circles are commonly used in preparing samples for metal analysis after nitric acid digestion.

Catalog Number	Diameter (Metric)
09850A	70 mm

Catalog number 09850A

Price (USD)

Diameter (Metric):

70 mm

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.

Extremely low ash content (0.007% ash maximum)
20μm nominal particle retention rating
Fast filtration speed (Herzberg 54 s)
Commonly used for routine air pollution analysis and soil pollution analysis
High-purity filters for quantitative analysis

Specifications

Airflow Rate4 s/100 mL/in²

DescriptionGrade 41 Fast Ashless Filter Paper, 70 mm circle (100 pcs)

Filter TypeAshless

FormatDisc

MaterialCotton Linters

Particle Retention20 μm

Pore Size20 μm

Filtration SpeedASTM, 12 seconds; Herzberg, 54 seconds

Flow RateFast

For Use With (Application)Designed for gravimetric analysis and the preparation of samples for instrumental analysis.For analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminum hydroxides).Also used in quantitative air pollution analys

GradeGrade 41

PorosityCoarse

Quantity100 Pk.

Thickness (Metric)215 μm

TypeQuantitative Filter Paper

Diameter (English)2.75 in.

Diameter (Metric)70 mm

Unit SizePK