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.

Catalog Number	Diameter (Metric)
FKS10740783	90 mm

Catalog number FKS10740783

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Diameter (Metric):

90 mm

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

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

Specifications

Airflow Rate96 s/100 mL/in²

DescriptionGrade 42 Ashless Filter Paper for Instrumental Analysis, 90 mm circle (100 pcs)

Filter TypeAshless

FormatDisc

MaterialCotton Linters

Particle Retention2.5 μm

Pore Size2.5 μm

Filtration Speed1870 sec.

Flow RateSlow

For Use With (Application)Designed for gravimetric analysis and the preparation of samples for instrumental analysis.For critical gravimetric analysis with the finest particle retention.

GradeGrade 42

PorosityFine

Quantity100 Pk.

Thickness (Metric)200 μm

TypeQuantitative Filter Paper

Diameter (English)3.54 in.

Diameter (Metric)90 mm

Unit SizePK