Filter Paper Grade No. 40, Quantitative, Ashless, Medium Retention – 4.25, Part number 1440-055-CY , Buy now from Whatman at Laboratory Disposable Products. Cytivas Whatman Grade 40 high-purity filters are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.

High-purity filters contain 0.007 maximum ash content
Medium nominal particle retention rating of 8 m
Medium filtration speed (Herzberg 340 s)
Particularly useful for gravimetric analysis

Specifications:
Grade: Grade 40
Type: Ashless
Typical Particle Retention in Liquid: 8 m
Nominal thickness: 210 m
Typical water flow rate: 25 ml/min
Nominal basis weight: 95 g/m
Nominal air flow rate: 21 s/100 mL/in
Nominal Ash Content: 0.007
Material: High-quality cotton linters
Alpha Cellulose Content Min.: 98
Typical Trace Element Levels: Aluminum 2.5 g/g Antimony <0.5 g/g Arsenic <0.5 g/g Barium <0.5 g/g Boron <1 g/g Calcium 8.3 g/g Chromium 1.5 g/g Copper 2 g/g Iron 12 g/g Lead <0.5 g/g Magnesium 4 g/g Manganese <0.5 g/g Mercury <0.5 g/g Potassium 2.3 g/g Silicon 6.2 g/g Sodium 16.8 g/g Zinc 64.5 g/g
Application: Designed for gravimetric analysis and the preparation of samples for instrumental analysis. Gravimetric analysis for numerous components in cements, clays, iron, and steel products. As a primary filter for separating solid matter from aqueous extracts in general soil analysis. Quantitative determination of sediments in milk and as a pure analytical grade clean-up filter for solutions prior to AA spectrometry. Also used as a high-purity filter in the collection of trace elements and radionuclides from the atmosphere.

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

Whatman Cytiva expertise have enabled advances in science and medicine that have shaped today’s biotechnology industry.

“Whatman” Cytiva at Dawn Scientific provides all types of product With a broad portfolio that includes Whatman filters and membranes, Amersham chromatography columns and resins, tissue culture reagents, and products for sample preparation, blotting, and protein analysis, Whatman Cytiva improved the discovery and manufacture of therapeutics.

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Filter Paper Grade No. 40, Quantitative, Ashless, Medium Retention – 4.25 | 1440-042 CY | Dawn Scientific