Whatman 1440-125 40 Ashless Filter Paper for Pollution Analysis, 125mm

Whatman 1440-125 Grade 40 Ashless Filter Paper for Pollution Analysis, 125 mm circle (100 pcs)

Brand : Whatman
Catalog No. : 1440-125

Whatman Quantitative Filter Papers, Ashless, Grade 40
Whatman Grade 40 high-purity filters from Cytiva's business are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.

Specification
Parameter Grade 40 Ashless Filter Paper for Pollution Analysis, 125 mm circle (100 pcs)
Grade Grade 40
Format Circles
Type Ashless
Typical Particle Retention in Liquid1 8 µm
Nominal thickness 210 µm
Typical water flow rate2 25 ml/min
Nominal basis weight 95 g/m²
Nominal air flow rate 21 s/100 mL/in²
Nominal Ash Content3 0.007%
Material High-quality cotton linters
Alpha Cellulose Content Min. ≥98%
Typical Trace Element Levels Aluminium 2.5 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 8.3 µg/g Chromium 1.5 µg/g Copper 2 µg/g Iron 12 µg/g Lead <0.5 µg/g Magnesium 4 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 2.3 µg/g Silicon 6.2 µg/g Sodium 16.8 µg/g Zinc 64.5 µg/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.
Dimensions Ø 125 mm
1Particle retention rating at 98% efficiency.
2For 9 cm diameter
3Ash is determined by ignition of the cellulose filter at 900°C in air.


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